Technical Information

Hydraulic Fan Drive Systems

www.danfoss.com

Technical Information
Hydraulic Fan Drive Systems

Revision history

2 | © Danfoss | Sept 2018

Table of revisions
Date

Changed

Rev

Sept 2018

Rebrand to Engineering Tomorrow

0403

June 2015

Danfoss layout - update product information

DA

November 2010

new back pageCC

February 2010

Fix Osaka address

CB

July 2009

updated manual adding new productsCA

June 2008

deletions and illustration modifications

BA

April 2008

added special tools part numbers

AC

March 2008

minor edits and corrections

AB

First editionAA

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Contents
General Information
Market Leading Experience.......................................................................................................................................................... 5
Typical Applications........................................................................................................................................................................ 5
Reduced Power Consumption.....................................................................................................................................................6
Trimmed and Standby Fan Speed..............................................................................................................................................7
Flexible Mounting............................................................................................................................................................................ 7
Wide Range of Components........................................................................................................................................................ 7
Basic Operation................................................................................................................................................................................. 7
Intelligent Control............................................................................................................................................................................ 7
Balanced Fan Speed and Heat Generation............................................................................................................................. 8
Fan Drive Systems
Modulating Fan Drive Systems....................................................................................................................................................9Gear Pump with Gear Motor and PLUS+1TM Fan Drive Controller.................................................................................9Gear Pump with PLUS+1TM Controller......................................................................................................................................9Variable Displacement Pump with Fan Drive Control......................................................................................................10
Variable Displacement Pump and HIC Cartridge Valve................................................................................................... 10
Closed Circuit System with Microcontroller.........................................................................................................................11
System Components
Gear Pumps......................................................................................................................................................................................12
Model Sizes and Capacities...................................................................................................................................................12
Configurations........................................................................................................................................................................... 12
Series 45 Variable Displacement Axial Piston Pumps....................................................................................................... 14
Series 45 Fan Drive Control........................................................................................................................................................ 15
D Series Motor.................................................................................................................................................................................16
SGM2Y Motor...................................................................................................................................................................................18
SGM3Y Motor...................................................................................................................................................................................18
L/K Frame Axial Piston Motors.................................................................................................................................................. 19
PLUS+1TM Controllers...................................................................................................................................................................21
Temperature Sensors....................................................................................................................................................................22
Models.......................................................................................................................................................................................... 23
Features........................................................................................................................................................................................23
PLUS+1 TM Compliance.......................................................................................................................................................... 23
System Design Parameters
Sizing Equations............................................................................................................................................................................. 25
Equations.....................................................................................................................................................................................25
Variables.......................................................................................................................................................................................25
System Design Data Form...........................................................................................................................................................26
Engine details.............................................................................................................................................................................26
Power steering...........................................................................................................................................................................26
Fan information.........................................................................................................................................................................27
Control preference................................................................................................................................................................... 27
Reservoir...................................................................................................................................................................................... 27
Fluid............................................................................................................................................................................................... 28
Filtration.......................................................................................................................................................................................28
Installation Guidelines
Pumps................................................................................................................................................................................................ 29
Pump Drives............................................................................................................................................................................... 29
Pump Inlet..............................................................................................................................................................................29
Pump Outlet..........................................................................................................................................................................29
Motors................................................................................................................................................................................................ 29
SGM2YN and SGM3YN Fan Drive Motors.........................................................................................................................29
D Series Fan Drive Motors......................................................................................................................................................29
L and K Variable Motors..........................................................................................................................................................30
Reverse Displacement Motors............................................................................................................................................. 30
Series 40 Fixed Displacement Motors............................................................................................................................... 30
Series 90 Fixed Displacement Motors............................................................................................................................... 30
Controls............................................................................................................................................................................................. 31© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Contents
PLUS+1TM controller................................................................................................................................................................31
Series 45 Fan Drive Controls................................................................................................................................................. 31
H1 Pump with Fan Drive Control........................................................................................................................................ 31
System................................................................................................................................................................................................32
Filtration.......................................................................................................................................................................................32
Operating Temperatures....................................................................................................................................................... 32
Fluids............................................................................................................................................................................................. 32
Installation Drawings
D Series Pumps............................................................................................................................................................................... 34
D Series Gear Motor...................................................................................................................................................................... 38
SGM2YN Gear Motor ....................................................................................................................................................................39
PRV10-IS2 Valve for SGM2Y........................................................................................................................................................48
PRV12-IS2 Valve for SGM3Y........................................................................................................................................................49
Reverse Displacement Motors (RDM)..................................................................................................................................... 50
Cartridge Motor.........................................................................................................................................................................50
Port locations and gauge installation............................................................................................................................... 51
L and K Frame Variable Motor................................................................................................................................................... 52
Motor Rotation.......................................................................................................................................................................... 53
Schematics ................................................................................................................................................................................. 53
Series 40 Fixed Motors................................................................................................................................................................. 53
M35/M44 MF: mounting flange...........................................................................................................................................54
M35/M44 MF: axial ports, twin ports, loop flushing, speed sensor........................................................................ 54
Series 90 Fixed Motors................................................................................................................................................................. 55
90K55 Fixed Motor Cartridge Mount.................................................................................................................................56
Fan Drive Control Schematic..................................................................................................................................................... 58
Schematics
Fan Drive System Schematics....................................................................................................................................................59
Fan Drive System Related Literature
Overview........................................................................................................................................................................................... 60
Gear Pumps.................................................................................................................................................................................60
Open Circuit Piston Pumps................................................................................................................................................... 60
Closed Circuit Piston Pumps.................................................................................................................................................60
Gear Motors................................................................................................................................................................................ 60
Open Circuit Piston Motors...................................................................................................................................................60
Controllers...................................................................................................................................................................................60
System Guidelines.................................................................................................................................................................... 60

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Technical Information
Hydraulic Fan Drive Systems
General Information
Market Leading Experience
Over a number of years, Danfoss has built up a wealth of experience with fan drive applications forvehicles and machines operating on and off the highway. This knowledge has been gained by providing
system solutions which integrate our market leading hydraulic pumps, motors, valves and electrohydraulic controllers.
Danfoss Hydraulic Fan Drive Systems Provide:

•
•
•
•
•
•
•
•
•
•

On-Off and fully modulating controls
Increased engine reliability
Decreased fan noise
Flexible cooling pack positioning
Vehicle fuel savings
Design flexibility with multiple inputs for the electro-hydraulic controllers plus CAN bus per SAEJ
1939
Integrated systems
Lower operating costs
Ability to downsize the engine while maintaining system productivity
Ability to provide engine anti-stall and overspeed protection

Typical Applications
Due to the versatility, flexibility and reliability of Danfoss fan drive systems, they may be applied innumerous applications, including the following.
Agriculture Machinery•••

On-Off and fully modulating controls
Increased engine reliability
Automatic or On-demand reversing

Construction Machinery

•
•
•
•
•
•

Backhoe loaders
Crawler dozer - Crawler loader
Wheel loaders
Dump trucks - Haulers
Excavators
Skid steer loaders

Material Handling Vehicles•••

Fork lift trucks
Rough terrain trucks
Telehandlers

Road Building Vehicles

•
•
•
•

© Danfoss | Sept 2018

PaversGraders
Road rollers
Crawlers

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Technical Information
Hydraulic Fan Drive Systems
General Information
Forestry Machinery

•
•
•
•

Feller bunchers
Forwarders
Harvesters
Log skidders

On Highway Vehicles

•
•
•
•

Buses
RV motorhomes
Garbage trucks
Sweepers

High Power Specialty Vehicles•••

MarineOil and Gas drilling/Fracking
MiningReduced Power Consumption
Danfoss hydraulic fan drive systems allow cooling fan power consumption to be tailored to coolingrequirements. Our systems provide a precise, modulated cooling flow for a given set of monitoredconditions.
The power to drive a cooling fan rises as a cubic function of fan speed (doubling the fan speed requires
an eight-fold increase of input power). However, engine power and cooling demand decrease at higher
speeds. Because of this inverse relationship, a direct drive cooling fan must be sized to meet coolingrequirement at a relatively low engine speed and is therefore significantly oversized for coolingrequirements at higher speeds. Hydraulic fan drive systems allow fan speed to be trimmed so the fan canbe properly sized at low engine speeds without drawing excessive power at high speeds.

b
ila
va

e
le

n

p
ne
gi

ow

er

Power
savings!

Power

A

Power vs Engine Speed Curve

e
Dir

fa n
ve
d ri
ct -

po

we

r

Trimm ed fan po wer

co o
in e
En g

d
lin g

ema

nd

Fan sized to meetthis condition
P101 274E

Idle

Engine speedMax

Fan systems are sized to provide required air flow at all engine speeds and operating conditions. Directdrive fans consume a great deal of power at higher engine speeds, without any advantage.
6 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
General Information
Trimmed and Standby Fan Speed
Under full cooling demand, maximum fan speed increases with engine speed, up to the set point of the
fan drive system (the point where further increase in speed yields no further gain). Beyond this point fan
speed does not increase, allowing greatly reduced power consumption compared to an untrimmed fan.
Under minimum cooling demand, standby fan speed can be set to provide very low, or minimal air flow.
Fan Speed vs Engine Speed

m
t rim
Un

e

an
df

sp e

ed

Trimmed fan speed

Fan speed

Set poin t

Trim at mid-range cooling demand

Fan standby speed

P101 275E

Engine speed

The upper curves represent maximum cooling conditions; maximum fan speed is trimmed at the set
point. The lowest curve represents the standby condition; fan speed is maintained at a minimum value.
Flexible Mounting
Hydraulic fan drives make it is possible to mount the radiator and fan just about anywhere on the vehicle.
This is advantageous in space conscious designs.
Wide Range of Components
A fan drive system is sized to provide the required fan torque and speed. Danfoss has a wide range ofpumps, motors, controls, and sensors to meet your unique fan drive system needs.
Basic Operation
In simplest terms, fan speed is controlled by regulating the amount of hydraulic oil passing through the
fan motor. The greater the flow, the greater the fan speed. The amount of flow is regulated based on one
or more inputs from the power system. Typically, engine coolant temperature is the main controlling
factor. Other system inputs may include hydraulic fluid temperature, charge air temperature and various
signals or switches. As inputs indicate a change in cooling demand, the system adjusts flow to the motor.
Intelligent Control
At the core of the Danfoss Fan Drive System is a controller that monitors relevant cooling parameters andadjusts fan speed accordingly.
Fan Drive Controller
The Danfoss fan drive control system monitors cooling parameter inputs and provides an electronic
signal to a proportional hydraulic valve. The proportional valve relays a hydraulic signal either to the© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
General Information
bypass valve on the motor or the displacement control of a variable displacement pump. Possible inputs
to the fan drive control system include engine coolant temperature, charge air temperature, engine ortransmission oil temperature, compartment temperature, ambient temperature, and various othersignals and switches. Also, many engine control systems provide a fan controlling signal or CAN message
which can serve as a cooling parameter input.
Balanced Fan Speed and Heat Generation
When an input, such as engine coolant temperature, rises above a predetermined level, signalling an
increase in cooling demand; fan speed is gradually increased. Coolant temperature and fan speed
continue to rise until heat generation and cooling are balanced. Under most conditions, this balanceoccurs at a level below the maximum capability of the system.
Maximum fan speed is reached only under simultaneous conditions of maximum ambient temperatureand maximum engine load. These parameters are set as part of the cooling system design criteria.
Fan Speed Vs. Engine Temperature
2000
1600
1400
1200
1000
800
600

P101 276E

Fan speed (rpm)

1800

400
200
0

(F) 170

175

(C)

80

180

185
85

190

195
90

Engine temperatur e

200

205
95

Fan speed is increased as monitored temperature increases until balance is reached.

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Technical Information
Hydraulic Fan Drive Systems
Fan Drive Systems
Modulating Fan Drive Systems
Monitoring various cooling system parameters enables the Danfoss modulating fan drive systems toincrease fan speed as required. As a modulating system, it ramps fan speed only to the level required,providing only as much air flow as needed to maintain balance between heat generation and cooling.
Gear Pump with Gear Motor and PLUS+1TM Fan Drive Controller
The pump receives oil directly from the reservoir through the inlet line. The output of the pump is
directed to a gear motor with an integral proportional relief valve.
The setting of the valve determines the maximum pressure in the system by bypassing oil (around the
motor’s gear set) directly to the return port of the motor. The proportional valve is normally closed andrequires the application of a PWM signal to reduce the bypass pressure. In a hydraulic fan drive system,
the pre-determined maximum pressure setting determines the maximum pressure to the motor, and the
maximum trim speed of the fan.
Applying a PWM signal to the valve allows the fan to run at speeds below its maximum trim speed,
regardless of the flow supplied by the pump.
Oil exiting the motor is directed back to the reservoir through a filter and a heat exchanger. Oil returning
to the reservoir must enter the reservoir well below the fluid level so air will not be entrained in the fluid.
The oil is diffused as it enters the reservoir to decelerate it to an acceptable level, to mix it with the fluid in
the reservoir, and to prevent the oil from flowing immediately back to the pump inlet. The return oil
should remain in the reservoir long enough to allow any entrained air in the fluid to rise to the surface
and dissipate back into the atmosphere. An anti-cavitation check valve prevents damage to the fan
motor in case of overrun. Fan overrun can occur when fan speed exceeds the speed commanded by thesystem due to the fan windmilling in the vehicle’s air stream.
Gear Pump with PLUS+1TM Controller
PLUS+1TM System Illustration

RESERVOIR
FilterMicrocontroller(PLUS+1 TM)
EngineControl
ModuleCAN-BUS J1939
Engine Cooling Command

Temperature
sensors
T1

T2

Gear pump(SNP or D)

DIESEL ENGINE

Fan drive
gear motor(D or SGMY)

T3

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Technical Information
Hydraulic Fan Drive Systems
Fan Drive Systems
Variable Displacement Pump with Fan Drive Control
The variable displacement pump sends flow to the fan motor. Based on sensor and other inputs, themicrocontroller adjusts the proportional relief valve to regulate the pressure in the pilot port of thepump’s load sensing control. Higher pressure in the pilot line results in increased flow to the fan motor.
The control has a pressure compensator feature which can be used to limit the fan’s trim speed. Trim
speed can also be set by software in the microcontroller.
Fan Drive Control System Illustration
Microcontroller(PLUS+1TM)

RESERVOIR
FilterTemperature
sensors
T1

T2

Variable pump
(Series 45)

DIESEL ENGINE

Gear motor
(SNM)

T3

P107 984E

Variable Displacement Pump and HIC Cartridge Valve
The system shown below is the same as the previous system with the addition of an electronicallycontrolled HIC cartridge valve between the pump and motor.
The HIC cartridge valve reverses the hydraulic flow to the motor, thus reversing the rotation of the fan.
This feature is commonly used to clean out the radiator if it becomes clogged with debris.
Variable Pump with HIC Cartridge Valve
Microcontroller(PLUS+1 TM)

RESERVOIR
Filter

SelectorswitchSignallamp

Temperature
sensors

T1

Gear motor
(SNM)

T2

Variable pump
(Series 45)
DIESEL ENGINE

T3
HIC
Cartridge valve
P107 985E

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Technical Information
Hydraulic Fan Drive Systems
Fan Drive Systems
Closed Circuit System with Microcontroller
The variable displacement axial piston pump sends flow to the fixed displacement piston fan motor.
Based on temperature sensor and other inputs, the microcontroller regulates the displacement of theaxial piston pump. Higher coolant temperature results in increased flow to the fan motor. The pumps
displacement control has a pressure compensator feature which can be used to limit the maximum fan
trim speed in either direction. Trim speed can also be set by software in the microcontroller. The nature of
the closed-loop system prevents fan overrun. Zero fan speed is available on demand.
Variable Pump with Fixed Piston Motor
Microcontroller(PLUS+1TM)

Filter
RESERVOIR

Temperature
sensors

FilterT1

T2

DIESEL ENGINE

Piston pump
(H1 w/fan drive control)

Fixed displacement
piston motor(S40 or S90)

T3

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Technical Information
Hydraulic Fan Drive Systems
System Components
Gear Pumps
Danfoss offers gear pumps in a variety of models, sizes, capacities, and configurations. Integral priority
flow dividers are available which supply a constant flow for power assisted steering with the remainder
driving the fan drive motor.
Model Sizes and Capacities
Danfoss gear pumps are available in the following models and sizes.

Aluminum construction•

Group 2•4 to 25 cm3/rev [0.24 to 1.53 in3/rev] displacement
Group 322 to 90 cm3/rev [1.34 to 5.49 in3/rev]

Cast iron construction•

Group 2.5 (D Series)
7 to 45 cm3/rev [0.43 to 2.75 in3/rev]

Configurations

•
•
•
•
•
•

Single pumpSingle pump with priority flow divider for power steering assist
Tandem pumps
Tandem pumps with priority flow divider for power steering assist
Multiple pumps (triple, quadruple, etc.)
Quadra-Flow pumps (digital displacement)

D Series pumps (single and tandem) are available with load sense and discrete flow options.
Group 2 aluminum gear pump

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Technical Information
Hydraulic Fan Drive Systems
System Components
Group 2.5 D Series gear pump

Quadra-Flow gear pump

© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Components
Series 45 Variable Displacement Axial Piston Pumps
Danfoss offers a complete family of variable displacement, open circuit, axial piston pumps. The Series 45
family offers a wide range of shafts, flanges, and porting options. Through drives are also available for
auxiliary pump drives. Load sensing (LS), pressure compensating (PC), remote pressure compensating(RPC) and electro-proportional fan drive controls are available.
Frame K/L•••

25, 30, 38 and 45 cm3/rev [1.53, 1.83, 2.32, 2.75 in3/rev]
Operating pressures up to 260 bar [3770 psi]
Speeds to 3200 min-1(rpm)

Frame J•••45, 51, 60, 65 and 75 cm3/rev [2.75 3.11, 3.66, 3.97, and 4.57 in3/rev]
Operating pressures to 310 bar [4495 psi]
Speeds to 2800 min-1(rpm)

Frame F•••74 and 90 cm3/rev [4.52 and 5.49 in3/rev]
Operating pressures to 310 bar [4495 psi]
Speeds to 2400 min-1(rpm)

Frame E•••

100, 130, and 147 cm3/rev [6.10, 7.93 and 8.97 in3/rev]
Operating pressures to 310 bar [4495 psi]
Speeds to 2450 min-1(rpm)

Frame J

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Technical Information
Hydraulic Fan Drive Systems
System Components
Frame K/L

Series 45 Fan Drive Control
The Series 45 fan drive control is an electric proportional control for Series 45 pumps. It controls thepump based on various machine operating parameters. In a fan drive system, coolant temperature forms
the basis for pump control.
When the solenoid is de-energized, the pump operates in the high pressure standby (pressurecompensation) mode; when the solenoid is fully energized, the pump returns to the low pressure
standby mode of operation. This allows the system to minimize energy loss when the cooling systemdoes not require cooling fan operation, potentially using existing system control components(temperature sensor or micro-controller).
The control is proportional. As the current applied to the solenoid increases, the regulated systempressure gradually decreases until the full current is applied, achieving low standby pressure.

© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Components

System pressure
Servo pressure
Pilot Pressure
Drain
Proportional solenoid

LS adjustment

LS spool

PC adjustment

PC spool

P106 027E

D Series Motor
D series fan drive motors are available in displacements from 17 cm3/rev [1.04 in3/rev]to 45 cm3/rev [2.75
in3/rev].
D series fan motors are PLUS+1 compliant.

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Technical Information
Hydraulic Fan Drive Systems
System Components
D Series Motor

D Series Motor Technical Data
Ratings

Units

17

19

21

23

25

29

32

36

38

41

45

Displacement

cm3/rev

17.0

19.0

20.5

22.5

25.4

29.0

31.8

36.1

38.0

41.0

45.0

in3/rev

1.04

1.16

1.25

1.37

1.55

1.77

1.94

2.20

2.32

2.50

2.75

bar

276

276

276

276

276

276

276

276

276

241

210

psi

4000

4000

4000

4000

4000

4000

4000

4000

4000

3495

3045

bar

303

303

303

303

303

303

303

303

303

265

231

psi

4400

4400

4400

4400

4400

4400

4400

4400

4400

3843

3350

Rated pressure

Peak pressure

Speed at rated pressure

Minimum shaft speed at 69 bar [1000 PSI]
Standard Weight

Mass moment of inertia of internal rotating
components

Theoretical torque at rated pressure

Theoretical power at rated speed© Danfoss | Sept 2018

maximum

3400

3400

3400

3400

3400

3400

3400

3400

3400

3000

3000

minimum*

600

600

600

600

600

600

600

600

600

600

600

rpm

400

400

400

400

400

400

400

400

400

400

400

kg

8.53

8.66

8.80

8.94

9.07

9.38

9.53

9.84

9.93

10.16

10.43

lb

18.8

19.1

19.4

19.7

20.0

20.7

21.0

21.7

21.9

22.4

23.0

x10-6 kg•m²

127

138

146

156

172

191

206

228

239

255

276

x10-6
slug•ft²

94

102

107

115

127

141

152

168

176

188

204

N•m

65.7

73.4

79.2

87.0

98.2

112.1

122.9

139.6

146.9

138.4

132.4

lbf•ft

48.5

54.2

58.4

64.2

72.4

82.7

90.7

102.9

108.3

102.1

97.6

kW

23.4

26.1

28.2

31.0

35.0

39.9

43.8

49.7

46.1

43.5

41.6

hp

31.2

34.9

37.6

41.3

46.6

53.2

58.4

66.3

61.1

58.0

55.5

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Technical Information
Hydraulic Fan Drive Systems
System Components
D Series Motor Technical Data (continued)
Ratings

Units

17

19

21

23

25

29

32

36

38

41

45

Case drain pressure

bar

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

psi

72.5

72.5

72.5

72.5

72.5

72.5

72.5

72.5

72.5

72.5

72.5

* minimum speed at maximum pressure
SGM2Y Motor
Group 2 fan drive motors are available in displacements from 8.4 cm3/rev [0.51 in3/rev]to 25 cm3/rev [1.54in3/rev].
Configurations include European and SAE flanges; taper 1:8, 1:5, and straight shafts Ø15.875 mm [0.62 in].
Group 2 fan drive motors are PLUS+1 compliant.
SGM2Y Motor

SGM2Y technical data
Units

Frame size
8.0

011

014

017

019

022

025

Displacement

cm3/rev[in3/rev]

8.4 [0.51]

10.8 [0.66]

14.4 [0.88]

16.8 [1.03]

19.2 [1.17]

22.8 [1.39]

25.2 [1.54]

Peak pressure

bar [psi]

270 [3916]

270 [3916]

270 [3916]

250 [3626]

230 [3336]

200 [2900]

180 [2610]

250 [3626]

250 [3626]

250 [3626]

230 [3336]

210 [3046]

180 [2610]

160 [2320]

150 [2176]

150 [2176]

150 [2176]

150 [2176]

130 [1885]

100 [1450]

100 [1450]

3500

3500

3500

3500

3500

3500

3500

Rated pressure
Back pressure
Maximum speed

min-1 [rpm]Weightkg [lb]4.73 [10.43]

4.83 [10.65]

5.03 [11.1]

5.18 [11.42]

5.23 [11.53]

5.33 [11.75]

5.53 [12.2]

Moment of inertia ofrotating components

x 10-6 kg•m2

32.4 [796]38.4 [911]47.3 [1122]

53.3 [1265]

59.2 [1405]

68.1 [1616]

74.1 [1758][x 10-6 lbf•ft2]

Electrical connector

model

Deutsch DT 04-2P connectors (Protection rate IP 69K DIN 400050)

A

0 to 1.1 A @ 12VDC, with coil resistance of 7.2 ohms @ 20°C [68°F]

Electrical current signal

0 to 0.55 A @ 24VDC, with coil resistance of 28.8 ohms @ 20°C [68°F]
PWM frequency

Hzfrom 100 to 200

SGM3Y Motor
Group 3 fan drive motor available in displacements from 22.1 cm3/rev [1.34 in3/rev]to 44.1 cm3/rev [2.69
in3/rev].
Group 3 fan drive motors are PLUS+1 compliant.
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Technical Information
Hydraulic Fan Drive Systems
System Components
SGM3Y Motor

SGM3Y technical data
Units

Displacement

cm3/rev

Frame size
022

026

033

038

044

22.1 [1.34]

26.2 [1.60]

33.1 [2.02]

37.9 [2.31]

44.1 [2.69][in3/rev]
Peak pressure

bar [psi]

Rated pressure
Back pressure
Maximum speed

min-1

210 [3046]

210 [3046]

210 [3046]

210 [3046]

210 [3046]

190 [2756]

190 [2756]

190 [2756]

190 [2756]

190 [2756]

120 [1740]

120 [1740]

120 [1740]

120 [1740]

120 [1740]

3500

2500

2500

2500

2500

[rpm]
Weightkg [lb]9.12 [20.11]

9.22 [20.33]

9.32 [20.55]

9.38 [20.68]

9.52 [21.0]

Moment of inertia
of rotating
components

x 10-6kg•m2[x 10-6
lbf•ft2]

198 [4699]

216 [5126]

246 [5838]

267.2 [6341]

294.2 [6981]

Electrical connector

model

Deutsch DT 04-2P connectors (Protection rate IP 69K DIN 400050)

Electrical current
signalA

0 to 1.1 A @ 12VDC, with coil resistance of 7.2 ohms @ 20°C [68°F]

PWM frequency

Hz

0 to 0.55 A @ 24VDC, with coil resistance of 28.8 ohms @ 20°C [68°F]
from 100 to 200

L/K Frame Axial Piston Motors
For higher power applications, Danfoss offers the L and K frame two position, axial piston motor. The KV
and LV motors can operate at two different displacements. Minimum displacement can be used whenhigh fan speed is required at low engine speed and maximum displacement can be used at high engine
speed. The K and L frame motors can also be used as single displacement motors.
This short, compact motor is configured ideally for installations requiring compact packaging andoptimized plumbing. All hydraulic ports are on one face of the motor. Axial or radial configurations areavailable.
Mounting• SAE B-2 bolt and Danfoss cartridge
Shaft
SAE 0.875 diameter cylindrical and 1:8 taper keyed shafts•

System Ports© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Components•

SAE O-ring boss, axial or twin radial locations

Specifications• 25, 30, 38 and 45 cm3/rev [1.52, 1.83, 2.14, 2.32 and 2.75 in3/rev] maximum displacements••

Operating pressure up to 415 bar [6000 psi]
Speeds up to 5500 min-1(rpm)Control• Direct acting single line hydraulic displacement control••

10 to 241 bar [150 to 3500 psi] shift pressure
Reverse Displacement Control (electric or hydraulic)

Options• Speed sensor••

Maximum displacement limiter
Integral over-pressure and anti-cavitation protection

LV Motor

20 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Components
LC Motor

PLUS+1TM Controllers
12 Pin Microcontroller© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 21

Technical Information
Hydraulic Fan Drive Systems
System Components
24 Pin Microcontroller

PLUS+1TM controllers and input/output expansion modules are designed to provide flexible, expandable,
powerful, and cost effective total machine management systems for off-highway vehicles. These modules
communicate with one another and other intelligent systems over a machine CAN (Controller Area
Network) data bus. PLUS+1TM hardware products are designed to be equally effective in a distributed
CAN network system, with intelligence in every node, or as stand-alone control for smaller machine
systems. PLUS+1TM systems are incrementally expandable: Additional modules can be easily added to themachine CAN network to increase system capabilities or computational power.
InputsEach input pin allows one or more of these functional types. For pins with multiple functions, input
parameters are user programmable using PLUS+1TM GUIDE templates.
• Digital (DIN)

•
•
•
•

Digital or Analog (DIN/AIN)
Digital or Analog or Frequency (DIN/AIN/FreqIN)
Analog or Temperature or Rheostat (AIN/Temp/Rheo)
Fixed Range Analog or CAN shield (AIN/CAN shield)

Outputs
PLUS+1TM control modules feature user-configurable universal output circuits. Output parameters are
configured using PLUS+1TM GUIDE templates. Refer to product data sheets for maximum current ratingsof individual modules. The following output types are supported:• Digital (DOUT)• PWM (PWMOUT)• Analog voltage suitable for driving Danfoss PVG valves (PVEOUT)CAN Ports
All PLUS+1TM modules have CAN ports that conform to CAN 2.0b specifications, including CAN shield.
Temperature Sensors
The Danfoss family of analog temperature sensors is designed to operate in conjunction with Danfoss
Fan Drive Controls. The PLUS+1TM compliant sensors are thermistor-type temperature sensors.

22 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Components
Temperature sensors

ModelsTwo models are available: An air sensor typically used to measure engine charge air temperature, and aliquid sensor typically used to measure engine coolant or oil temperature.

Features

•
•
•
•
•

Integrated connector and sensor body
Brass body construction
Anti-fouling air temperature sensor design
50° C to 125° C operating temperature
range, FDC software configurable

For proper operation, the air temperature sensor must be mounted at the top of the manifold pipe withthe sensor tip facing down.
Temperature versus resistance limits
Measured Temp, ° C[°F]
50 [122]

Resistance, Ohms
NominalTolerance

810.9

±5%

80 [176]

283.0

±5%

100 [212]

152.9

±8%

125 [257]

76.9

±8%

PLUS+1 TM Compliance
The Danfoss temperature sensors are compliant with the larger microprocessors (for example theMC050). The MC050 microprocessor has internal resistance in its four temperature inputs.
If you are using the Danfoss temperature sensors with the smaller microprocessors (for example theMC012 and MC024), you will need to connect the sensors in series with an external resistor (Rv) as shownin the following illustration.

© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 23

Technical Information
Hydraulic Fan Drive Systems
System Components
Analog sensor voltage

For assistance in configuring the temperature sensors contact your Danfoss representative.

24 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Design Parameters
Sizing Equations
Equations

Pumps
Based on SI units

Based on English units=

Vg • n • η v
1000(l/min)=Vg • n • η v

Input torque M =Vg • ∆p
20 • π • η m(N•m)

Input torque M =Vg • ∆p2 • π • ηm(lbf•in)

Input power P =Vg• n• ∆p
600 000 • η m(kW)

Input power P =Vg• n• ∆p
396 000 • η m

(hp)

231

(US gal/min)

MotorsBased on SI units

Based on English units

Output torque M=

Vg • ∆p • η m
20 • π(N•m)

Output torque M=

Vg • ∆p • η m
2•π(lbf•in)

Output power P=

Q • ∆p • η t
600

(kW)

Output power P=

Q • ∆p • η t
1714

(hp)

Variables

SI units [English units]
Vg = Displacement per revolution cm3/rev [in3/rev]
pO = Outlet pressure bar [psi]pi = Inlet pressure bar [psi]∆p = pO - pi (system pressure) bar [psi]n = Speed min-1 (rpm)ηv = Volumetric efficiency
ηm = Mechanical efficiency
ηt = Overall efficiency (ηv • ηm)
SI unit formulas are based on cm3, bar, N, N•m, W.
English formulas are based on in3, psi, lbf•in, hp.

© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 25

Technical Information
Hydraulic Fan Drive Systems
System Design Parameters
System Design Data Form
Print this form. Fill in all the fields and check the appropriate check boxes. Fax the filled out form to yourDanfoss Power Solutions Technical Sales Representative.
Engine details

Manufacturer

Model or Series
Engine PTO
Belt Drive

Pump Rotation

Clockwise, Right hand
Counterclockwise, Anti-clockwise, Left hand

Input torquelimit:CL

C

O

SpeedsLow Idle
Governed
High Idle

RPM (rated)
RPM (rated)
RPM (max speed)UN

O C K W IS E

SE

Ratio
:1
(engine to pump)

Pump Drive

TE R

C LOC KW

I

P106110

Power steering(if applicable)

Controlled Flow Requirement

US gal/min

Steering Pressure(maximum)

psi

l/min

bar
P104 376E

26 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Design Parameters
Fan information

Manufacturer

Model or Series

Fan Diameterinmm

Fan Input PowerHP

kW

Fan Rotation(viewed on motor shaft, see illustration)

Clockwise
Counterclockwise

Fan Trim Speedrpm

At speed

Clo ckwise

rpm
Co
un

Set Point at Fan Trim Speed(engine speed where max heat load occurs)

rpm

Coolant Temperature at Fan Trim Speed(coolant temp where max fan speed is required)°Ft e rclo ckw

ise

°C

Note: To properly size and specify a fan drive system, fan power requirements must be stated as accurately as possible. Fan power requirements
can be determined from fan curves supplied by the manufacturer. Radiator and cooler manufacturers will supply air flow requirements basedon heat loads. Air flow information must include accurate air flow and static pressure to determine correct fan power requirements.
P101 344E

Control preferenceElectro-Hydraulic Modulating

Electro-Hydraulic ON/OFF

Single Input
Multiple Inputs
P104 377E

Reservoir

Reservoir Capacity

US galliter
P104 378E© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
System Design Parameters
Fluid

Hydraulic Fluid Typeat 40° C [104°F]

Viscosity

SUS

cSt

at 100° C [212°F]

Maximum Fluid Temperature°C°F
P104 379E

Filtration

Filter Position

Inlet Line

Filter Flow

Full Flow
Partial Flow

Pressure Line
Return Line
(recommended)

Filter Rating

micronx ratio

Note: Do not locate the filter cartridge inside the reservoir. This reduces the reservoir capacity and reduces the dwell time (the time the oil
spends in the resrevoir). It also increases the potential for damage to the hydraulic components due to aeration of the oil.

28 | © Danfoss | Sept 2018

P104 380E

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Technical Information
Hydraulic Fan Drive Systems
Installation Guidelines
Pumps
Pump Drives
Where possible, avoid radial and axial loads on the pump drive.
For in-line drives, place a suitable drive coupling between the prime mover (e.g. engine) and the pump
input shaft to remove radial and axial load potential. For belt driven pump applications an outrigger
bearing may be required to relieve the pump of radial loads. Outrigger bearings are available with ball orroller bearing support for such applications. For Power Take Off (PTO) drives (where an external gear isassembled to the pump), and for belt driven pump applications, consult your Danfoss representative.
In many applications the limiting factor for driving a pump is available torque. Pump drive shafts have atorque limit based on material, design and system pressure. Likewise, pump drives such as air
compressors with PTOs also have torque limits. When planning to drive a pump on the back of an air
compressor, first check with the compressor supplier to understand their product torque limitations.
Most compressors do not have a constant torque capability across their speed range. Typically, thetorque capability of a compressor is lower at low engine speeds and increases to a speed where thecapability remains constant.
A number of pump drive shafts are generally available across the Danfoss product range. Consider
driveshaft selection carefully.

Pump Inlet
When designing the inlet portion of the hydraulic circuit, it is important to keep the pump inlet pressure
within published limits. To reduce the chances of inlet cavitation problems, observe the following
guidelines:• Position reservoir outlet above the pump inlet level whenever possible.

•••

Make the inlet line (hose and fittings) as straight and as short as possible without inducing bending or
stress loads onto the inlet port.
Size the inlet line to keep fluid velocities and inlet pressure within the limits published in theindividual product literature.
To reduce the chances of port fitting leakage, we recommend using SAE split flange or O-ring boss
ports whenever possible.

Pump Outlet•••

Make the outlet line (hose and fittings) as straight and as short as possible without inducing bendingor stress loads onto the outlet port.
Ensure the outlet line is sized to keep fluid velocities within the limits published in the individual
product literature.
To reduce the chances of port-fitting leakage we recommend using SAE split flange or O-ring boss
ports whenever possible.

MotorsSGM2YN and SGM3YN Fan Drive Motors
SGM2Y and SGM3Y fan drive motors have the proportional solenoid bypass relief valve built into the rearcover. Electrical connector is Deutsch DT 04-2P. Mount the motor so the relief valve is below the reservoir
oil level. Keep the relief valve in a horizontal position.
D Series Fan Drive Motors
D series fan drive motors are available with an integrated proportional or standard relief valve. Mount the
motor so the relief valve is below the reservoir oil level. Keep the relief valve in a horizontal position.
© Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Guidelines
L and K Variable Motors
L and K variable motors do not have over-pressure protection or an anti-cavitation valve integrated into
the motor. Both valve functions need to be provided externally.
L and K variable motors may be applied in open circuit systems without external back-pressure valves, aslong as the motor case pressure does not exceed the outlet pressure by more than 0.5 bar [7 psi].
Typically the motor's maximum displacement is used when the system is sized for maximum coolingwhen the engine is at Full Load High Idle speed. The motor's minimum displacement is selected toprovide improved cooling when the engine is at its low idle speed.
Reverse Displacement Motors
The Reverse Displacement Motor is a unique design variation of the L and K variable motors.
It has been designed to reverse the direction of fan rotation without using an externally mounted fourway directional control valve.
The motor is switched from maximum displacement in the forward direction to maximum displacementin the reverse direction with an integrated solenoid valve.
Over-pressure protection and an anti-cavitation valve are integrated into the motors endcap.
Series 40 Fixed Displacement Motors
Series 40 motors are available with over-pressure protection and an anti-cavitation valve in aunidirectional open circuit configuration.
They may be applied in open circuit systems without external back-pressure valves as long as the motor
case pressure does not exceed the outlet port pressure by more than 0.5 bar [7.0 psi].
Bi-directional open circuit operation is available, provided that a four-way directional control valve islocated between the pump and the motor.
Series 90 Fixed Displacement Motors
Series 90 fixed displacement motors are available without over-pressure protection or an anti-cavitation
valve in an open circuit configuration.
They may be applied in open circuit systems without external back-pressure valves, but specific axial
thrust, case pressure, and maximum shaft speed limits must be respected. (Consult your Danfoss
Technical Sales Representative for assistance when specifying a Series 90 fixed displacement motor in an
open circuit application.

30 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Guidelines
Controls
PLUS+1TM controller
The Plus+1TM controller is designed to control many different hydraulic devices. Mount the Plus+1TM
controller in a convenient, out of the way, location. A diagnostic connector is required to connect to the
Plus+1TM controller. Mount the connector in an easily accessible location in the operators cabin. Follow
the wiring guidelines found in Plus+1TM module technical literature.
Series 45 Fan Drive Controls
In Danfoss open circuit fan drives, fan speed is regulated by controlling the system pressure differential
across the fan motor. In Series 45 pumps, this is provided by using the Electric Proportional Control
variation. The Electric Proportional Control consists of a proportional solenoid integrated into the Remote
Pressure Compensated control housing. This control provides an output pressure proportional to thecurrent supplied to the solenoid and allows the pump to be operated at any pressure limit between theload sense and pressure compensation settings by varying the current sent to the solenoid. Both
Normally Closed and Normally Open control configurations are available. The Normally Closed
configuration is usually applied in system cooling fan installations. It is desireable that the fan fail to fullspeed if there is an interruption of the electrical command to the solenoid, for any reason.
H1 Pump with Fan Drive Control
A fan drive control option is available for the H1 family of high power, closed circuit, variabledisplacement pumps. The H1 Fan Drive Control is compatible with the PLUS+1TM controller and the fandrive application block. The Fan Drive Control is designed with a single solenoid and uses a single control
input to regulate both the fan speed and direction of rotation.
When the pump speed is at the design set point, fan speed required for the desired cooling capacity isdetermined by the pump's displacement. In many systems, the fan's speed at this condition may be close
to its maximum design speed. If the pump speed increases beyond the set point and the pump iscommanded to maximum displacement; then the fan speed will increase in proportion to the pumpspeed ratio and the pressure drop across the fan motor will increase in proportion to the square of thepump speed ratio. To prevent this from happening, the system designer is encouraged to limit the
maximum fan speed in each direction of rotation by adjusting the set pressure of the Pressure Limiters
for both directions of rotation.
The Fan Drive Control (FDC) has limitations on the maximum servo delta pressure developed, comparedto other types of controls, and so there are limitations to the operating conditions which can be achievedin the various frame size H1 pumps. Typical fan drive systems are unusual in that they achieve peakpressure only at high flows, so it is important that FDC equipped pumps not be applied beyond thespecified limits. (Refer to Fan Drive Design Guidelines 520L0926, Appendix H, for additional information,or contact your Danfoss Technical Sales Representative for assistance.)
Fan drives are sized with reserve pump capacity so that peak fan speed can be maintained even whenengine speed is reduced, as illustrated below. This is a feature that is unique to the Danfoss H1 Fan Drive
Control; it allows the system to maintain a nearly constant fan speed without the need for additional
control algorithms in the fan drive controller. In this example, representing an engine lugging condition(engine speed change of 20%), there was no significant reduction in fan speed.

© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 31

Technical Information
Hydraulic Fan Drive Systems
Installation Guidelines
Prime Mover Speed Change (2500 - 2000 - 2500 rpm)
RPM
Bar x 10 3
3.0
400
2.9
360
2.8
2.7
320
2.6
280
2.5
240
2.4
2.3
200
2.2
2.1
160
2.0
120
1.9
1.8
80
1.7
40
1.6
0
1.5
1.4
-40
1.3
-80
1.2
1.1
-120
1.0
-160
0.9
0.8
-200
0.7
0.6
-240
0.5
-280
0.4
-320
0.3
0.2
-360
0.1
-400 0.0

Swashplate Angle

Input speed

Fan drive speed

M4_M5_Servo_Press

MA_MB_System_Press

0

1

2

3

4

5

6

7

8

9

10
Seconds

11

12

13

14

15

16

17

18

19

Bar Degrees
30
20
28
18
26
24
16
22
14
20
12
18
16
10
14
12
8
10
6
8
6
4
4
2
2
0
0
-2
-2
-4
-4
-6
-8
-6
-10
-12
-8
-14 -10-16-18 -12-20-14-22-24 -16-26-18-28-30 -2020
P108679

SystemFiltration
To prevent premature wear, it is imperative that only clean fluid enters the pump and hydraulic circuit. A
filter capable of controlling the fluid cleanliness to class 22/18/13 (per ISO 4406-1999) or better, undernormal operating conditions, is recommended. At initial start up, the system can be at Class 25/22/17 but
should not be run at high speed or pressure until the Class 22/18/13 is achieved through filtration. Since
the filter must be changed at regular intervals, the filter housing should be located in an accessible area.
Appropriate filter change intervals may be determined by test or by gauges indicating excessive pressure
drop across the filter element.
For more information refer to Design Guideline for Hydraulic Fluid Cleanliness, Technical Information
520L0467.
Operating Temperatures
With Buna seals and normal operating conditions, the system temperature should not exceed 82 °C [180°F] except for short periods to 93 °C [200 °F]. With optional Viton elastomer, the system may be operated
at continuous temperatures up to 107°C [225°F] without damage to the hydraulic components.

C Caution
Operation in excess of 107 °C [225 °F] may cause external leakage or premature unit failure.
FluidsA mineral based fluid is recommended that includes additives to resist corrosion, oxidation and foaming.
The oil should have a maximum viscosity commensurate with system pressure drop and pump suction
pressures. Since the fluid serves as a system lubricant, as well as transmitting power, careful selection of
the fluid is important for proper operation and satisfactory life of the hydraulic components. Hydraulic
32 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Guidelines
fluids should be changed at appropriate intervals determined by test, supplier, or by change in color, orodor, of the fluid.
Every 10°C [18°F] rise in continuous reservoir temperature over 80°C [176 °F] decreases the life of the oil
by ½.
For additional technical information on hydraulic fluids refer to Hydraulic Fluids and Lubricants 520L0463
Technical Information Bulletin and specific product technical bulletins.
For information relating to biodegradable fluids, see Danfoss publication Experience with Biodegradable
Hydraulic Fluids 520L0465 or consult the Danfoss Technical Services Department.

© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 33

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
D Series Pumps
D Series pump counterclockwise (CCW) rotation
12.45[0.49]

Dimensions in mm [in]10.41
[0.41]

6.1[0.24]

Inlet port
1 5/16-12 UN-2B SAE Str. thd.
for 1 in. O.D. tube
47.75
[1.88]

Ø

82.55
82.50
[3.250][3.248]20.32[0.80]

133.87[5.27]

A
106.38[4.19]
53.17[2.09]

Ø 95.5[3.76]

Excess flow port (EF)
7/8-14 UNF-2B SAE Str. thd.
for 5/8 in. O.D. tube

2X R 11.18[0.44]

2X Ø

11.68[0.46]

39.91[1.57]

22.07
Ø 21.82

20.63[0.81][0.869][0.859]22.55[0.89]
61.76[2.43]SAE B 13T:

*Except as noted
13 Tooth spline, 16/32 pitch
30° Pressure angle
Flat root side fit
Per ANSI B92.1-1970. Class 7

Priority flow port (CF)
3/4-16 UNF-2B SAE Str. thd.
for 1/2 in. O.D. tube
45.47
[1.79]

B

41.15[1.62]

C

63.39[2.50]
74.20[2.92]

29.97 *
[1.18]
Eff. spline

D

Illustration of left-hand (CCW) rotation(SAE B mount available)

P106 103E

For specifications and measurements for A, B, C, and D, refer to the folowing table.

34 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
D Series Pump Clockwise (CW) Rotation
12.45[0.49]

Dimensions in mm [in]10.41
[0.41]

6.1[0.24]

Priority flow port (CF)
3/4-16 UNF-2B SAE Str. thd.
for 1/2 in. O.D. tube

47.75
[1.88]

21.12[0.83]

82.55
Ø
82.50
[3.250][3.248]18.09[0.71]
61.27[2.41]

133.87[5.27]
80.55[3.17]

Excess flow port (EF)
7/8-14 UNF-2B SAE Str. thd.
for 5/8 in. O.D. tube

BC
D

106.38[4.19]
53.19[2.09]

Ø 95.5[3.76]

Inlet port
1 5/16-12 UN-2B SAE Str. thd.
for 1 in. O.D. tube
26.42 *
[1.04]
Eff. spline

2X R 11.18[0.44]
11.68
2X Ø[0.46]

18.64
Ø 18.52[0.734][0.729]20.32[0.80]SAE A 11T:

*Except as noted

11 Tooth spline, 16/32 pitch
30° Pressure angle
Flat root side fit
Per ANSI B92.1-1970. Class 7
or better

63.39[2.50]

A

45.47[1.79]

74.60[2.94]

38.11[1.50]

Illustration of right-hand (CW) rotation(SAE B mount available)

P106 104E

Nominal pumpdisplacement
cm3/rev[in3/rev]

Maximum
continuouspressurebar [psi]

Maximumpressurebar [psi]

Maximum speed
min-1 (rpm)A
mm [in]Bmm [in]Cmm [in]D
mm [in]7.0 [0.43]

276 [4000]

303 [4400]

3400

80.5 [3.17]

92.0 [3.62]

94.5 [3.72]

116.1 [4.57]

9.5 [0.58]

276 [4000]

303 [4400]

3400

82.9 [3.27]

94.4 [3.72]

96.9 [3.82]

118.5 [4.67]

12.6 [0.77]

276 [4000]

303 [4400]

3400

86.1 [3.39]

97.5 [3.84]

100.1 [3.94]

121.7 [4.79]

14.3 [0.87]

276 [4000]

303 [4400]

3400

87.8 [3.46]

99.2 [3.91]

101.7 [4.01]

123.3 [4.86]

17.0 [1.04]

276 [4000]

303 [4400]

3400

90.4 [3.56]

101.9 [4.01]

104.4 [4.11]

126.0 [4.96]© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 35

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Nominal pumpdisplacement
cm3/rev[in3/rev]

Maximum
continuouspressurebar [psi]

Maximumpressurebar [psi]

Maximum speed
min-1 (rpm)A
mm [in]Bmm [in]Cmm [in]D
mm [in]19.0 [1.16]

276 [4000]

303 [4400]

3400

92.5 [3.64]

103.9 [4.09]

106.4 [4.19]

128.0 [5.04]

20.5 [1.25]

276 [4000]

303 [4400]

3400

94.0 [3.70]

105.4 [4.15]

108.0 [4.25]

129.6 [5.10]

22.5 [1.37]

276 [4000]

303 [4400]

3400

95.8 [3.77]

107.3 [4.22]

109.8 [4.32]

131.4 [5.17]

25.4 [1.55]

276 [4000]

303 [4400]

3400

98.8 [3.89]

110.2 [4.34]

112.8 [4.44]

134.4 [5.29]

29.0 [1.77]

276 [4000]

303 [4400]

3200

102.4 [4.03]

113.8 [4.48]

116.4 [4.58]

138.0 [5.43]

31.8 [1.94]

276 [4000]

303 [4400]

3000

105.2 [4.14]

116.6 [4.59]

119.1 [4.69]

140.7 [5.54]

36.0 [2.20]

241 [3500]

265 [3850]

2750

109.4 [4.31]

120.9 [4.76]

123.4 [4.86]

145.0 [5.71]

38.0 [2.32]

228 [3300]

250 [3630]

2750

111.4 [4.39]

122.8 [4.84]

125.4 [4.94]

147.0 [5.79]

41.0 [2.50]

207 [3000]

228 [3300]

2500

114.4 [4.50]

125.8 [4.95]

128.4 [5.05]

150.0 [5.90]

45.1 [2.75]

190 [2750]

209 [3025]

2500

118.6 [4.67]

130.1 [5.12]

132.6 [5.22]

154.2 [6.07]

Quadra-Flow Pump
Inlet port

145.5
[5.73]

Outlet port

151.4
[5.96]

75.7[2.98]

132.6[5.22]

198.6[7.82]

36 | © Danfoss | Sept 2018

P108899

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
D Series Pumps with Priority Flow Schematic

CF
EF

P106105

D Series Pump with Load Sensing Schematic

LS

CF
EF

P107897© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 37

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Quadra-Flow Schematic

P108900

D Series Gear Motor
D Series Motor Dimensions

B

Ø

14.23
[0.56]

External drain - drive side

Inlet port and outlet port
sized identically2 pin
Deutschconnector

44.4[1.75]

85.1[3.35]

20.32[0.8]
Motor is alsoavailable withcavities only
(no valve)

170.0[6.69]

44.4[1.75]

A

88.9[3.50]C

External drain - idler side

CW motor shown. For CCW motor, valve is on the opposite side.

17

19

P107 882E

Dimensions

Units

21

23

25

29

32

36

38

41

45

Dimension
A

mm

88.9

90.9

92.5

in

3.50

3.58

3.64

94.2

97.3

100.8

103.6

107.7

109.7

112.8

117.1

3.71

3.83

3.97

4.08

4.24

4.32

4.44

4.61

Dimension B

mm

91.7

93.8

95.3

97.0

100.1

103.6

106.4

110.7

112.5

115.6

119.9

in

3.61

3.69

3.75

3.82

3.94

4.08

4.19

4.36

4.43

4.55

4.72

Dimension C

mm

154.4

156.5

158.0

160.0

162.8

166.4

169.2

173.5

175.5

178.6

182.6

in

6.08

6.18

6.22

6.30

6.41

6.55

6.66

6.83

6.91

7.03

7.19

Dimensions in table are maximum dimensions.

38 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
SGM2YN Gear Motor
02AA
156 max[6.142 max.]

CW motor shown. For CCW motor, valve is on the opposite side.

C +1.5 [+0.059] max

92 max[3.622 max.]

B ±1[±0.04]

72

34.5

[1.36]

65.5[2.59](100 [3.94])

15.7 ±0.5[0.62 ±0.02 ]120 [4.72] max.

[2.83]

9+0.5
0Inlet D

[0.35+0.02
0 ]Ø 0.75X

B ±1[±0.04]
Connector: Deutsch DT 04-2P

A ±0.5 [±0.02]

XE

R 0.8 max.
[0.03 max.]Outlet103 [4.055] max.

67.6 max.
[2.66 max.]

15.7 ±0.5[0.62 ±0.02 ]-0.06-0.002[Ø3.15 -0.004
]

o

45

Ø 80 -0.106

7.2 ±0.25[0.28 ±0.01]

89 max[3.504 max.]

36.2 max.
[1.425 max.]

G M6-6H
12 [0.47] min.
full thread

26 ±1[1.02 ±0.04 ]12.5 ±1[ 0.49 ±0.039]

Voltage: 12V DC (Current 1.1 A)
24V DC (Current 0.55 A)
PWM 100-200 Hz

Valve type: PRV10–IS2+0.5 [+0.02 ]00

Drain: 9/16–18UNF–2B(SAE J1926/1 O-Ring boss)
12.7 [0.5] min. full thread

F ±0.2 [±0.008]

P005 400E

SGM2YN - 02AA dimensions
Frame size
Dimension
mm [in]Inlet port

© Danfoss | Sept 2018

8.0

011 [0.67]

014 [0.95]

017 [1.04]

019 [1.16] 022 [1.34] 025 [1.53]A

47 [1.85]

49 [1.93]

52 [2.05]

54 [2.13]

56 [2.17]

59 [2.32]

61 [2.40]

B

95.5 [3.76]

99.5 [3.91]

105.5[4.15]

109.5 [4.31]

113.5[4.47]

119.5[4.70]

123.5[4.86]

C

118.5[4.66]

122.5[4.83]

128.5[5.05]

132.5 [5.22]

136.5[5.37]

142.5[5.61]

146.5[5.77]

D

7/8-14 UNF-2B (SAE J1926/1 O-ring boss); 16.7 [0.66] min. full thread

520L0824 | BC00000115en-000403 | 39

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
SGM2YN - 02AA dimensions (continued)
Frame size
Outlet port

8.0

011 [0.67]

E

15 [0.59]

F

35 [1.38]

014 [0.95]

019 [1.16] 022 [1.34] 025 [1.53]
20 [0.79]
40 [1.57]

M6-6H; 12[0.47] min. full thread

G
Drain port

9/16 18UNF-2B (SAE J1925/1 O-ring boss) 12.7 [0.50] min. full threads

38 ±1[1.5 ±0.04]

13 ±0.5[0.51 ±0.02]

Detail ‘P’
3.7 max[0.14 max]

5.7 ±0.75[0.22 ±0.029](19.3)([0.76])16.5 ±0.75[0.65 ±0.029]

M12x1.25-6g
11.5 [0.453] min.
full threadHP

90 ±0.25[3.54 ±0.01]

A

A[Dia 0.687]

Ø 17.46017 [1.04]

Ø 34 [Dia 1.34]
Depth 5 [0.2] max

1: 5
Ø 0.35

X

+0.3

A-A

9 -0.1[0.354 +0.012-0.004 ]Detail ‘H’

Inlet D(SAE J1926/1 O-Ring boss)
16.7 [0.66] min. full thread0

3 -0.0250[0.118 -0.001 ]39.5 ±0.25[1.555 ±0.01]
P005 401E

For more information regarding SGM2Y gear motors, refer to SGM2Y and SGM3Y Fan Drive Motors
Technical Information 11040345.

40 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
06BA
156 max[6.142 max.]
132 max[5.2 max.]

CW motor shown. For CCW motor, valve is on the opposite side.

106.38

B ±1 [±0.04][4.19].
ax
8 m ax.
R 4 9] m
8[1.

06.35 -0.5
0 ][0.25-0.02

12 ±1[ 0.47 ±0.04 ]R1
2[0. .7 m
5]
ma ax.
x.

115.5 max.
[4.55] max.
19.5 max.
[0.77] max.

0

15.7 ±0.5[0.62 ±0.02 ]0[Ø3.25 +0.002]

Ø 82.55 +0.05

X

11–11.6[0.43–0.46]

R 0.8 max.
[0.03 max.]

Inlet DØ 0.75

X

Connector: Deutsch DT 04-2P

C +1.5 [+0.06] max.

Voltage: 12V DC (Current: 1.1 A)
24V DC (Current: 0.55 A)
PWM: 100–200 Hz

A ±0.5 [±0.02]

103 max.
[4.055] max.

67.6 max.
[2.66] max.

15.7 ±0.5[0.62 ±0.02 ]26 ±1[1.02 ±0.04 ]36.2 max.
[1.43] max.

89 max[3.504 max.]

Valve Type: PRV10-IS2
Drain: 9/16–18UNF–2B(SAE J1926/1 O-Ring boss)
12.7 [0.5] min. full thread

Outlet E(SAE J1926/1 O-Ring boss)
F min. full thread

P005 402E

SGM2Y - 06BA dimensions
Frame size

011 [0.67]

014 [0.95]

017 [1.04]

019 [1.16] 022 [1.34] 025 [1.53]

Dimension
mm [in]A

47 [1.85]

49 [1.93]

52 [2.05]

54 [2.13]

56 [2.17]

59 [2.32]

61 [2.40]

B

95.5 [3.76]

99.5 [3.91]

105.5[4.15]

109.5 [4.31]

113.5[4.47]

119.5[4.70]

123.5[4.86]

C

116 [4.57]

120 [4.72]

126 [4.96]

130 [5.11]

134 [5.28]

140 [5.51]

144 [5.67]

Inlet port

D

Outlet port

E
F

Drain port

© Danfoss | Sept 2018

8.0

7/8-14 UNF-2B (SAE J1926/1 O-ring boss); 16.7 [0.66] min. full thread
7/8-14 UNF-2B

1 1/16-12 UN-2B

16.7 [0.66] min. full thread

19 [0.75] min. full thread

9/16 18UNF-2B (SAE J1925/1 O-ring boss) 12.7 [0.50] min. full threads

520L0824 | BC00000115en-000403 | 41

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings

40.5 ±1[1.59 ±0.04]

12.5 ±0.5[0.49 ±0.02]

Detail ‘P’(19.3)([0.76])

17 ±0.75[0.67 ±0.029]

M12x1.25-6g
11 [0.433] min.
full threadH

90 ±0.25[3.54 ±0.01]

A[Dia 0.687 ]Ø 17.46

5.7 max.
[0.22 max.]PAØ 0.35

Detail ‘H’Ø 34 [Dia 1.34]
Depth 5 [0.2] max

1: 8

+0.15

6.3 ±0.75[0.25 ±0.029]

Inlet D(SAE J1926/1 O-Ring boss)
16.7 [0.66] min. full threadXA-A

9.5 -0.25[0.37+0.006-0.0098 ]0

4 -0.030[0.16 -0.0012]

39.5 ±0.25[1.56 ±0.01]
P005 403E

For more information regarding SGM2Y gear motors, refer to SGM2Y and SGM3Y Fan Drive Motors
Technical Information 11040345.

42 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
06GB
156 [6.14] max.
132 [5.2] max.

CW motor shown. For CCW motor, valve is on the opposite side.
36.2 [1.42] max

106.38

B ±1 [±0.04][4.19]R 48 [1.89] max.

11-11.6[0.43-0.46]

19.5 max[0.77 max]

15.7 ±0.5[0.62 ±0.02 ]Valve Type: PRV10-IS2

Inlet DØ 0.75 X

C ±1.5 [±0.06] max.

K

Connector: Deutsch DT 04-2P
Voltage: 12V DC (Current: 1.1 A)
24V DC (Current: 0.55 A)
PWM: 100–200 Hz

A ±0.5 [±0.02]
12.0 ±1[0.47±0.04]

26 ±1[1.02 ±0.04 ]89 [3.5] max

15.7 ±0.5[0.62 ±0.02 ]0][Dia 3.25 -0.001

0Ø 82.55 -0.05

06.35 -0.5
0[0.25 -0.02]

X

103 [4.05] max

67.6 [2.66] max

115.5 max
[4.55 max]

R 12.7 [0.5] max.

R 0.8 [0.03] max.
Outlet E

Drain 9/16-18UNF-2B(SAE J1926/1 O-Ring boss)
12.7 [0.5] min full thread(SAE J1926/1 O-Ring boss)
F min. full thread

P005 404E

SGM2YN - 06GB dimensions
Frame size
Dimension
mm [in]011 [0.67]

014 [0.95]

017 [1.04]

019 [1.16] 022 [1.34] 025 [1.53]A

47 [1.85]

49 [1.93]

52 [2.05]

54 [2.13]

56 [2.17]

59 [2.32]

61 [2.40]

B

95.5 [3.76]

99.5 [3.91]

105.5[4.15]

109.5 [4.31]

113.5[4.47]

119.5[4.70]

123.5[4.86]

C

116 [4.57]

120 [4.72]

126 [4.96]

130 [5.11]

134 [5.28]

140 [5.51]

144 [5.67]

Inlet port

D

Outlet port

E

7/8-14 UNF-2B

1 1/16-12-UN-2B

F

16.7 [0.66] min. full thread

19 [0.75] min. full thread

Drain port

© Danfoss | Sept 2018

8.0

7/8-14 UNF-2B (SAE J1926/1 O-ring boss); 16.7 [0.66] min. full thread

9/16 18UNF-2B (SAE J1925/1 O-ring boss) 12.7 [0.50] min. full threads

520L0824 | BC00000115en-000403 | 43

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
58.0 ±1[2.31 ±0.04]
7.9 ±0.75

BA

Detail ‘H’Ø 0.35 X

A-A

M6 - 6H
17.475–17.729[0.688–0.698]

16 min.
[0.63 min.]0

4 -0.0250[0.16 -0.001]

Inlet D(SAE J1926/1 O-Ring boss)
16.7 [0.66] min. full thread
39.5 ±0.25

B-B

Ø 34 [Dia 1.34]
Depth 5 [0.2] max.

[0.62 ±0.01 ]Ø 0.1 / 25.4 K[0.51 ±0.029]

A

B

H

90 ±0.25[3.54 ±0.01 ]0[Dia 0.625-0.001]

0Ø 15.875 -0.025

50.8 ±0.25[2.0 ±0.01]

P005405

For more information regarding SGM2Y gear motors, refer to SGM2Y and SGM3Y Fan Drive Motors
Technical Information 11040345.

44 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
07BC
176.5 max
[6.949 max]
146.05 [5.75]
CW motor shown. For CCW motor, valve is on the opposite side.

123 min.
[4.84 min.]22.22 ±0.5[0.875 ±0.02 ]157 max[6.18 max]

R6
1
[2.4 max
ma .
x.]

x.
ma .]
.3 max5
R 1 602[0.

Inlet DØ 0.7512.8 max[0.504 max]

27 max[1.06 max]

B ±1 [±0.0394]

XR[5 141
.55 m
m ax.
ax
.]

14.15 - 14.75[0.557 - 0.581]

115 max[4.53 max]

C ±1.5 [±0.06] max.

Connector: Deutsch DT 04-2P

B ±1 [±0.04]

Voltage:12 V DC (Current: 1.1A)
24 V DC (Current: 0.55A)
PWM 100-200 Hz

A ±0.5 [±0.02]

115 max[4.53 max.]

R 0.8 max.
[0.03 max.]

97.2 max[3.83 max]

22.22 ±0.5[0.875 ±0.02 ]0

Ø 101.6 -0.05
0[Dia 3.999 -0.002]

X

148 max[5.83 max]

13.5 ±1[0.532 ±0.04]

22.22 ±1[0.875 ±0.0394 ]0[0.38 -0.02]

52.8 max[2.08 max]

09.65 -0.5

Valve type: PRV12–IS2

168.5 max
[6.63 max]Outlet E(SAE J1926/1 O-Ring boss)
F min. full thread

Drain: 9/16–18UNF–2B(SAE J1926/1 O-Ring boss)
12.7 [0.5] min. full thread
P005 406E

SGM3YN - 07BC dimensions
Frame size
Dimension
mm [in]

026

033

038

044

63

64.5

67

68.8

71

B

127.1

130.1

135.1

138.6

143

C

20 [0.787]

20 [0.787]

27 [1.063]

27 [1.063]

27 [1.063]

Inlet port

D

Outlet port

E

1-1/16-12UN-2BF

19 [0.75] min. full thread

Drain port
© Danfoss | Sept 2018

A022

1-1/16-12UN-2B

9/16 18UNF-2B (SAE J1925/1 O-ring boss) 12.7 [0.50] min. full threads

520L0824 | BC00000115en-000403 | 45

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
67.5 ±1[2.657 ±0.04]
42.9 ±0.25[1.69 ±0.01]
28.4 ±0.5[1.12 ±0.02]

15.9 ±0.75[0.59 ±0.029]

H

23.1 [0.91]
5/8–18UNF–2A
21.5 [0.846]
min. full threadØ 4 ±0.1[Dia 0.16 ±0.004]

A

Detail ‘H’

1: 8

X

A-A
3.33 – 3.07
[0.13 – 0.12]

06.375 -0.025
0[0.25 -0.001]

Inlet D(SAE J1926/1 O-Ring boss)
19 [0.748] min. full thread

52.6 ±0.5

Ø 0.35

Ø 41 [Dia 1.61]
Depth 5 [0.2] max.

Outlet[2.07 ±0.02][Dia 0.875]

Ø 22.225

115 ±0.25[4.53 ±0.01]

A

P005407

For more information regarding SGM3Y gear motors, refer to SGM2Y and SGM3Y Fan Drive Motors
Technical Information 11040345.

46 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
07GB
176.5 max
[6.949 max]
CW motor shown. For CCW motor, valve is on the opposite side.

146.05 [5.75]
123 min.
[4.84 min.]22.22 ±0.5[0.875 ±0.02 ]157 max[6.18 max]

Inlet DØ 0.7512.8 max[0.504 max]

27 max[1.06 max]

23 ±0.3[0.906 ±0.012]

R6
1[2.4 maxma .
x.]

B ±1 [±0.0394]

x.
ma .]
.3 max5
R 1 602[0.

X

14.15 - 14.75[0.557 - 0.581]

115 max[4.53 max]R
[5 141
.55 m
m ax.
ax
.]

C ±1.5 [±0.059] max.
B ±1 [±0.04]
Connector: Deutsch DT 04-2P

X
R 0.8 max.
[0.03 max.]

97.2 max[3.83 max]

22.22 ±0.5[0.875 ±0.02 ]Ø 101.6 -0.05

0[Dia 3.999 -0.002]

0115 max[4.53 max.]

52.8 max[2.08 max]

13.5 ±1[0.532 ±0.04]

Voltage:12 V DC (Current: 1.1A)
24 V DC (Current: 0.55A)
PWM 100-200 Hz

148 max[5.83 max]

09.65 -0.5
0[0.38 -0.02]

23 ±0.3[0.906 ±0.012]

22.22 ±1[0.875 ±0.0394 ]A ±0.5 [±0.02]

Valve type: PRV12–IS2

168.5 max
[6.63 max]Outlet E(SAE J1926/1 O-Ring boss)
F min. full thread

Drain: 9/16–18UNF–2B(SAE J1926/1 O-Ring boss)
12.7 [0.5] min. full thread
P005 408E

SGM3YN - 07GB dimensions
Frame size

026

033

038

044

Dimension
mm [in]

A

61

63

64.5

66.5

69.5

B

132.5

135.5

140.5

144.0

148.5

C

20 [0.787]

20 [0.787]

27 [1.063]

27 [1.063]

27 [1.063]

Inlet port

D

Outlet port

E

1 1/16-12UN-2BF

19 [0.748] min. full thread

Drain port
© Danfoss | Sept 2018022

1 1/16-12UN-2B

9/16 18UNF-2B (SAE J1925/1 O-ring boss) 12.7 [0.50] min. full threads

520L0824 | BC00000115en-000403 | 47

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
49.2 ±1[1.937 ±0.04]

C
115 ±0.25[4.53 ±0.01][Dia 0.875 ]Ø 22.225H

15.9 ±0.75[0.59 ±0.029]

33.3 ±0.25[1.31 ±0.01]

BBCØ 0.1 / 25.4 K
Ø 0.35 X

Detail ‘H’Ø 41 [Dia 1.61]
Depth 5 [0.2] max

Inlet D(SAE J1926/1 O-Ring boss)
19 [0.748] min. full thread

C-C

B-B

24.76 – 25.07[0.975 – 0.987]

52.6 ±0.5[2.07 ±0.02]

1/4–20UNC–2B

Outlet06.375 -0.025

25 min.
[0.98]

0[0.25 -0.001]

P005 409E

For more information regarding SGM3Y gear motors, refer to SGM2Y and SGM3Y Fan Drive Motors
Technical Information 11040345.
PRV10-IS2 Valve for SGM2Y
Connector type:
Deutsch DT04-2P, IP69K

12 point SOCKET 26 mm
Tightening 3÷5 N·m

Hexagon 27
Tightening 45÷50 N·m

Ø 26.5[Dia 1.04]

54.5 [2.15]

36 [1.42]

7/8−14UNF−2A

7.5 [0.3]
Ø 37 [Dia 1.46]

50 [1.97]
115.4 [4.54]

30 [1.18]
31.5 [1.24]
P005 396E

48 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
PRV12-IS2 Valve for SGM3Y
Connector type:
Deutsch DT04-2P, IP69K

12 point SOCKET 26 mm
Tightening 3÷5 N·m

Hexagon 32
Tightening 68÷75 N·m

Ø 31.5[Dia 1.24]

54.5 [2.15]

36 [1.42]

1-1/16−12UN−2A

7 [0.28]
Ø 37 [Dia 1.46]

50 [1.97]
114.4 [4.504]

29 [1.14]
45 [1.77]
P005 397E© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 49

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Reverse Displacement Motors (RDM)
Cartridge Motor

78.3 ± 1.544.5

72 ± 0.8

6.22
67 ± 0.3

77 ± 1.5

68.5 ± 0.8

22
± 0.5

102.1 ± 1.5

108.3 ± 1.5

Approximate
Center of Gravity

Case drain
port

2x 86.9± 1.5

83 ± 0.12

101.6 ± 0.8

Approximate
Center of Gravity
Case Drain
port

54.6
± 0.8

System Port A

2x 37.5± 0.8

2x 14.2 ± 0.5

57.4
± 0.8

87.4 ± 0.8

Deutsch DT04-2P
Solenoid Connector

148.3 ± 2.5

System Port B

2x 80 ± 0.2

P108915

Recommended mounting hardware
Bolt size

Grade

Torque N•m [lbf•ft]

Mounting circle diameter

1/2 inch5

86 [64]160 mm [6.299 in]

8122 [90]

Use hardened washer under each bolt head.

50 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Port locations and gauge installation
Pressure measurements can be obtained by installing tee fittings to the connections at the locations
listed in the table below. Recommended gauge sizes are listed.
Twin radial port locations
X1

F

MB

MA

L1

L1

A

B
P108844

Port information
Port identifier

MetricInch

Pressure obtained

Gauge size, bar [psi]X1

ISO 6941-1, M 18x1.5

ISO 11926-1, 3/4-16

Control signal

600 [10 000]

L1

ISO 6941-1, M 14x1.5

ISO 11926-1, 9/16-18

Case drain

10 [100]

ISO 6941-1, M 27x2

ISO 11926-1, 1-1/16-12

A/B

System pressure

600 [10 000]

MA/MB

ISO 11926-1, 7/16 - 20

System gauge port

600 [10,000]

F

ISO 11926-1, 7/16-20

Brake release port

© Danfoss | Sept 2018-

520L0824 | BC00000115en-000403 | 51

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
L and K Frame Variable Motor
Dimensions in mm [in]System pressure port A
1-1/16-12 UNF - 2Bthd.

57.82 mm
[2.276 in]

System pressure port B
1-1/16-12 UNF - 2Bthd.

70.71 mm
[2.784 in]
43.74 mm[1.722 in]Control port X1
Shift to min. angle
9/16-18 UNF - 2Bthd.

19.5 mm[0.77 in]26.71 mm[1.052 in]Woodruff key
6.3+0.025/-0
x ø22.2

31.5 mm[1.24 in]

0.750-16 UNF - 2Athd.
ø4.00 mm[0.157 in]

22 mm[0.87 in]

ø22.22 mm[0.875 in]Gauge ø38 mm
[1.50 in]

ø9.33 mm[0.367 in]ø Gauge
178.1 mm[7.01 in]

28 mm
[1.10 in]2x

Case drain port L2
3/4 - 16 UNF - 2Bthd.

34.50 mm
[1.358 in]

182.4 mm
[7.18 in]8.82 mm [0.347 in]
Fan hub must not
Protrude beyond this point

AXIAL ENDCAP OPTION

Control port X2
Shift to max. angle
9/16-18 UNF - 2Bthd.

160.9 mm
[6.33 in]90.7 mm[3.57 in]

128.45 mm[5.06 in]
45 mm
[1.77 in]

System pressure port A
1-1/16 - 12 UNF -2Bthd.

25 mm[0.98 in]40.6 mm[1.6 in]40.6 mm[1.6 in]19.5 mm[0.77 in]

System pressure port B
1-1/16-12 UNF - 2B thd.

Case drain port L1
3/4 -16 UNF - 2Bthd.

Control port X1
Shift to min. angle
9/16-18 UNF - 2Bthd.

TWIN ENDCAP OPTIO
N

61.2 mm[2.41 in]2X

Taper 1:8
per SAE J501
Nominal ø25.4[ø 1.00]

73 mm[2.87 in]2x

15 mm
[0.59 in]
108 mm
[4.25 in]
105 mm
[4.13 in]83.7mm[3.30 in]

89 mm
[3.5 in]

38 mm[1.50 in]66.25 mm
[2.61 in]
2X
Case drain port L2
3/4-16 UNF - 2B thd.

52 | © Danfoss | Sept 2018+0.20
ø14.3 -0.13 mm

182.4 mm
[7.18 in]

+0.01
[0.563in]
2x -0.005

9.6 mm[0.38 in]
R1 Max.
[0.039]174 mm
[6.85 in]+0.000mm-0.05+0.000[4.000 -0.002 in]ø101.6

P101298

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Motor Rotation
L and K Frame variable motors are fully bidirectional. The table gives the direction of rotation withrespect to flow direction through the motor.
Rotation by Flow Direction
Mount

SAE-B

Cartridge

Flow A→B

CCW

CW

Flow B→A

CW

CCW

Schematics
Motor schematic, single line control
M1

X1

A

MIN
B

L2
M2

L1

P107 784

Motor schematic, dual line control
M1

X1

X2

A

MIN

B

L2
M2

L1

P107 785

Series 40 Fixed Motors© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 53

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
M35/M44 MF: mounting flange
66.55 [2.620]
Case drain - L1 and L2
both sides
Approx. center ofgravity

4.06[0.16]CW

CCW

14.27 dia.
[0.562] (2) places

70.36[2.77](2) places

87.25[3.435](2) places
P100569E*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M35/M44 MF: axial ports, twin ports, loop flushing, speed sensor
Flow direction

54 | © Danfoss | Sept 2018

Motor shaft rotation

Port APort B

ClockwiseIn

Out

Counterclockwise

Out

In

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
M35-M44 MF dimensions

92.1[3.62]

184.9[7.28]

186.8[7.34]

30.5[1.200]84.8[3.34]

1-1/16 -12
O-ring boss
Per SAE J514
(2) places
44.4[1.75]

71.9[2.83]

7/8 -14
O-ring boss
Per SAE J514
Alternate case drain - L2

77.7
[3.06](2) Places
Port B

40.1[1.58](2) places

Axial Ported Endcap

7/8 -14
O-ring boss
Per SAE J514
Case drain - L3

186.3
[7.34]
154.6[6.08]

1-1/16 -12(2) places

Port A

92.1[3.63]
12.8[0.51]

79.5
77.1 [3.13][3.04]

78.2[3.08]

71.9[2.83]
23.9[0.94](2) Places

7/16 -20*
System pressuregauge port - M2

Loop flushingvalve (option)

7/16 -20*
System pressuregauge port - M1

Loop flushing
shuttle valve (option)

99.1[3.90]

Twin Ports*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
Series 90 Fixed Motors© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 55

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
90K55 Fixed Motor Cartridge Mount
0.875 – 14 straightthread O-ring boss
case outlet port L11

41.8[1.64]

41.8[1.64]

0.5625 – 18 straightthread O-ring boss
system pressuregauge port M1 1

End cap ports
25.4 [1.00 dia.] – 6000 psi(4) bolt split flange type per
SAE J518 (Code 62)
except20.8 [0.82] minimum
full thread depth

63.7[2.51]

130.80 ± 0.023[5.150 ± 0.001]
83.14 ± 0.54
[3.273 ± 0.021]

18.8[0.74]

11.2[0.44]

0.5625 – 18 straightthread O-ring boss
system pressuregauge port M2 1

Port “A”
Port “B”

Loop flushingrelief valve

View “Z”(rear view)
axial ported
82.3[3.24]

153.7[6.05]
Ports “A”& “B”

82.3[3.24]

146.8[5.78]

View “Y”(top view)"Y"

13[0.512]

6.3[0.248]O-ring seal

Loop flushing
shuttle valve99[3.90]"Z"

108[4.25]

91.4[3.60]
ports“A”&“B”

Port “B”

Port “A”
0.5625 – 18 straight thread
O-ring boss system pressuregauge port M2 1

View"Z"(rear view)twin ported

"X"

152.4
[6.00]

Axial ported

51.8[2.04]

Twin ported“W”
left side view

End cap options:
C = Twin-no loop flush
1 = Twin code 61
8 = Twin
25.4 [1.00 dia.] – 6000 psi(4) bolt split flange typeper SAE J518 (Code 62)
except 20.8 [0.82]
minimum full depth
D = Twin-metric ports
1.00 – 6000 psi (4) bolt
split flange tupe per
SAE J518 (Code 62)
except M12x1.75
thread 0.87 [22]minimum full thread

159.975 ± 0.025[6.2982± 0.001]

R. 0.0 [0.0] maximum
86.4[3.40]

Port “B”

0.5625 – 18 straightspeed sensing port 1

41.78[1.645] 18.8
[0.74]
41.78[1.645]

Port “A”

114.31[4.50]

17[0.67]

0.875 – 14 straightthread O-ring boss
case outlet port L21

63.71[2.51]

View “W”(bottom view)P101 438

All SAE straight thread O-rings ports per SAE J1926 (fittings per SAE 514). Shaft rotation is determined byviewing motor from output shaft end. Contact your Danfoss representative for specific installation
drawings

56 | © Danfoss | Sept 2018

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Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Splined output shaft options
Output shaft
optionShaft diameter T Full spline
length U

Major diameter
V

Pitch diameterW

Number ofteeth Y

Pitch Z

S1

24.9
[0.98]

27.9[1.10]

31.13[1.2258]

29.634[1.1667]

14

12/24

C6

29
[1.14]

32.5[1.28]

34.42[1.3550]

33.338[1.3125]

21

16/32

Flow direction

176[6.93]
35°(4) places

230[9.06]

Shaft rotation

Flow direction
Port “A”

Port “B”

Clockwise (CW)

Out

In

Counterclockwise (CCW)

In

Out

100
[3.94]

100[3.94]CCW

CW

Coupling must not
protrude beyond
this surface"U"80[3.15]
caseoutlet"V" dia.

86.1[3.39]
case outlet(alternate position)
17.1 +0.5-0.25[0.67 +0.02-0.01 ]
2 places

Port “B”"T" dia. maximum

R.2.54[R 0.10] maximum

Splined shaft option s(see tables)
Port "A"View “X”(front view)
Speed senso r connecto r
61.86[2.435]

Coupling must not protrude
beyond 58.1 [2.29] maximum
7.938 [0.3125] square key
x38.1 [1.5] long
Ø34.900[Ø1.3740]

Shaft option K1© Danfoss | Sept 2018

P101439

520L0824 | BC00000115en-000403 | 57

Technical Information
Hydraulic Fan Drive Systems
Installation Drawings
Fan Drive Control Schematic
PLUS+1TM Microcontroller
Fan drive motorX

2

1

temp. sensors
switches
engine PWM

B
M2

L2
S

L1

S45 Frame J pump with PRV control

58 | © Danfoss | Sept 2018

P108870

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems
Schematics
Fan Drive System Schematics
Gear Motor (with proportional control) Schematic

P104 375E

S45 Fan Drive Controller Schematic
X

B
M2

L2
S

© Danfoss | Sept 2018

L1

P106 012

520L0824 | BC00000115en-000403 | 59

Technical Information
Hydraulic Fan Drive Systems
Fan Drive System Related Literature
Overview
Fan drive systems may consist of a variety of pump, motor, valve and control combinations. The productcodes shown on the following pages are for components that have been designed specifically for fan
drive systems. Refer to the literature listed below for product code information and specifications forother Danfoss components that may be utilized in a fan drive system.
Gear Pumps

•
•
•
•

SNP 2 (group 2) Gear Pumps 520L0560
D Series Gear Pumps 520L0781
Group 1 thru 3 Gear Pumps and Motors 520L0557
SNP 3 (group 3) Gear Pumps 520L0569

Open Circuit Piston Pumps•

Series 45 Open Circuit Axial Piston Pumps 520L0519

Closed Circuit Piston Pumps•••

Series 42 Variable Piston Pumps 11022637
Series 90 Axial Piston Pumps and Motors 520L0603
H1 Pumps with Fan Drive Control - (045-100 cm3) 11062168

Gear Motors••

SGM2Y and SGM3Y Fan Drive Gear Motors 11040345
D Series Gear Motors Including Fan Drive 11044656

Open Circuit Piston Motors

•
•
•
•

L and K Frame Variable Motors 520L0627
Series 40 Axial Piston Motors 520L0636
Series 90 Axial Piston Motors 520L0604
RDM Motors L1424445

Controllers

•
•
•
•

Fan Drive Control Temperature Sensors BLN-95-9063
Electronic Fan Drive Controller (FDC) 11005336
Electronic Fan Drive Controller Assembly (FDCA) 11005337
PLUS+1TM Controller Family 520L0719

System Guidelines••

60 | © Danfoss | Sept 2018

Design Guidelines for Hydraulic Fluid Cleanliness 520L0467
Design Guidelines for Hydraulic Fan Drive Systems 520L0926

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Technical Information
Hydraulic Fan Drive Systems© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 61

Technical Information
Hydraulic Fan Drive Systems

62 | © Danfoss | Sept 2018

520L0824 | BC00000115en-000403

Technical Information
Hydraulic Fan Drive Systems© Danfoss | Sept 2018

520L0824 | BC00000115en-000403 | 63

Products we offer:

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

DCV directional control
valvesElectric converters
Electric machines
Electric motors

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic andelectric components. We specialize in providing state-of-the-art technology and solutions
that excel in the harsh operating conditions of the mobile off-highway market as well as themarine sector. Building on our extensive applications expertise, we work closely with you toensure exceptional performance for a broad range of applications. We help you and othercustomers around the world speed up system development, reduce costs and bring vehicles
and vessels to market faster.

Hydrostatic pumps

Danfoss Power Solutions – your strongest partner in mobile hydraulics and mobile
electrification.

Orbital motors

Go to www.danfoss.com for further product information.

PLUS+1® controllers

We offer you expert worldwide support for ensuring the best possible solutions foroutstanding performance. And with an extensive network of Global Service Partners, we also
provide you with comprehensive global service for all of our components.

Hydrostatic motors

PLUS+1® displays
PLUS+1® joysticks andpedals
PLUS+1® operator
interfaces
PLUS+1® sensors
PLUS+1® software
PLUS+1® software services,support and training
Position controls andsensors
PVG proportional valves
Steering components andsystems
Telematics

Comatrolwww.comatrol.com

Local address:

Turollawww.turollaocg.com
Hydro-Gear
www.hydro-gear.com
Daikin-Sauer-Danfoss
www.daikin-sauer-danfoss.com

Danfoss
Power Solutions (US) Company
2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239 6000

Danfoss
Power Solutions GmbH & Co. OHG
Krokamp 35
D-24539 Neumünster, Germany
Phone: +49 4321 871 0

Danfoss
Power Solutions ApS
Nordborgvej 81
DK-6430 Nordborg, Denmark
Phone: +45 7488 2222

Danfoss
Power Solutions Trading(Shanghai) Co., Ltd.
Building #22, No. 1000 Jin Hai Rd
Jin Qiao, Pudong New District
Shanghai, China 201206
Phone: +86 21 3418 5200

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

© Danfoss | Sept 2018

520L0824 | BC00000115en-000403