CAT 785®

OFF-HIGHWAY TRUCK BARE CHASSIS

Caterpillar offers off-highway truck bare chassis designed for specialty machines in a variety of applications —including water trucks, tow tractors, and fuel / lube trucks. When configured as a water truck, the tank capacity is
30,000 gallons (113 500 liters). These partial machine configurations allow construction, quarry, and mining customers topurchase complete solutions from our global Cat ® dealer network — with support every step of the way.

PROVEN CAT TRUCK PLATFORM

SAFETY INFUSEDCat trucks are built for durability, reliability, andefficiency to deliver the performance you need insome of the toughest applications around the world.

Integrated Cat Detect system, 360-degree surroundview, LED lighting, 600 mm (24 in) wide walkways,
guarding of rotating components and hydraulic brakesystem with enhanced traction control system. Optional
Working at Heights and Powered Access Stairway.

APPLICATION-SPECIFICCAB & ROPS CERTIFICATIONCat Off-Highway Truck Bare Chassis ROPS is certified
to ISO 3471 Tractor criteria, to provide a higher levelof protection for towing applications.

OPERATOR-FOCUSED ENVIRONMENTThe new cab features the Next Generation operator
seat with GenTherm, improved storage, pass throughegress, automated temperature control, and an
integrated transmission hoist control and jog dial for
improved control — providing the operator with aquieter, smoother, more comfortable ride.

POWER TO THE GROUND
The proven Cat 3512E engine offers flexibility bothin terms of emission profiles and power ratings.
An optional engine meeting U.S. EPA Tier 4 Final andEU Stage V emission standards is available with theCat Selective Catalytic Reduction (SCR) system. Witha standard power of 1,600 hp or an optional 1,450 hp— this truck is available to match your application.

STREAMLINED SERVICEABILITY
Modular HVAC and radiator, remote troubleshooting
and flash updates, optional Cat Health Equipment
Insights, Electronic Operation and Maintenance
Manual (OMM), and ground level serviceability
improve maintenance and reduce downtime.

SUPPORTED BY THE CAT DEALER
NETWORK+ Full support of Cat dealer and parts network+ Cat dealer installation & retrofit kits available+ Eligible for Equipment Protection Plans (EPP)& Customer Value Agreements (CVAs)

785 Off-highway Truck Bare Chassis Specifications
Configurations and features may vary by region. Please consult your Cat® dealer for availability in your area.

EngineOperating Weights – without Hoist Cylinders (HRC)

Engine Model

Cat 3512E

Bare Chassis Weight

84 853 kg

187,068 lb

Rated Engine Speed

1,650 rpm

Payload164 623 kg

362,931 lb

Gross Power - SAE J1995:2014

1193 kW

1,600 hp

Front Axle Bare Chassis Weight

47 008 kg

103,634 lb

Net Power - SAE J1349:20111125 kW

1,509 hp

Front Axle Payload

35 319 kg

77,865 lb

Rear Axle Bare Chassis Weight

37 844 kg

83,431 lb

129 304 kg285,066 lb

Emissions Rating®

Fuel Optimized

Bore

170 mm

6.7 inRear Axle PayloadStroke

215 mm

8.5 in

Displacement

58.56 L3,573 in 3

• LRC = Lesser Regulated Countries. HRC = Highly Regulated Countries.
• Bare chassis weight does not include debris. Weights shown with

• Net Power advertised is the power available at the flywheel when theengine is equipped with air intake system, exhaust system, and alternator.
• U.S. EPA Tier 4 Final / EU Stage V available for applicable markets.
• Additional fuel optimized selectable power ratings: 1,450 hp

Michelin 33R51 Tires. The payload includes anything added to thebare chassis.
• Care must be taken when designing any attachments so that theaxle weights are not exceeded.

Tires & Rims

Operating Weights – all configurations
Gross Vehicle Weight249 476 kg

550,000 lb

Front Axle Gross Vehicle Weight

82 327 kg

181,499 lb

Rear Axle Gross Vehicle Weight

167 148 kg

368,498 lb

Operating Weights – with Hoist Cylinders (LRC)

33.00 R51 (standard)

36.00 R51 (optional)

610 mm (24") Rims (standard)

660 mm (26") Rims (optional)• Quick Change Rims optional.
• Caterpillar recommends the customer evaluate all job conditions andconsult tire manufacturer for proper tire selection and TKPH (TMPHcapabilities.

Bare Chassis Weight

85 623 kg

188,766 lb

Weights – Approximate

Payload163 853 kg

361,234 lb

Rated Gross Machine Weight (RGMW)

Front Axle Bare Chassis Weight

47 435 kg

104,576 lb

33.00 R51 Tires

249 476 kg

550,000 lb

Front Axle Payload

34 892 kg

76,923 lb

36.00 R51 Tires

255 826 kg

564,000 lb

Rear Axle Bare Chassis Weight

38 188 kg

84,190 lb

Nominal Rated Payload (NRP)

Rear Axle Payload

128 960 kg

284,308 lb

33.00 R51 Tires

139 tonnes

153 tons

36.00 R51 Tires

142 tonnes

157 tons

Operating Weights – without Hoist Cylinders (LRC)• Consult your tire manufacturer for maximum tire load.

Bare Chassis Weight

83 725 kg

184,582 lb

Payload165 751 kg

365,418 lb

Front Axle Bare Chassis Weight

46 383 kg

102,257 lb

Front Axle – Empty

55.4 %

Front Axle – Loaded

33 %Rear Axle – Empty

44.6 %

Rear Axle – Loaded

67 %Front Axle Payload

35 944 kg

79,242 lbRear Axle Bare Chassis Weight

37 341 kg

82,322 lb

Rear Axle Payload

129 807 kg

286,175 lb

Operating Weights – with Hoist Cylinders (HRC)
Bare Chassis Weight86 751 kg

191,253 lb

Payload162 725 kg

358,747 lb

Front Axle Bare Chassis Weight48 060 kg

105,954 lb

Front Axle Payload

34 267 kg

75,545 lb

Rear Axle Bare Chassis Weight

38 690 kg

85,296 lb

Rear Axle Payload

128 458 kg

283,201 lb

2

Weight Distributions – Approximate

Final Drives
Double reduction, planetary with full floating axles.
Differential Ratio

2.10:1

Planetary Ratio

10.83:1

Total Reduction Ratio

22.75:1

785 Off-highway Truck Bare Chassis Specifications
Braking SystemCab

Service Brakes: Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated

Air Conditioning (HFC - 134A refrigerant)

24,500 Btu/hr

Brake Surface – Front

61 270 cm2

9,487 in2

Heater / Defroster

33,300 Btu/hr

Brake Surface – Rear

89 728 cm

13,908 in

ROPS Certification RatingStandards (Service and Secondary)

22ISO 3450:2011

Tractor ROPS Rating

785 WTR (Tractor)

105 000 kg

231,485 lb

Parking Brake: Four-corner, Multi-disc, Spring applied, Hydraulically Released• The operator sound pressure level, 77 dB(A) with direct drive and 75Transmission• ROPS (Rollover Protective Structure) meets ISO 3471:2008 fordBA) with optional clutch, tested to ISO 6396:2008.

Forward 1

12.1 km/h

7.5 mphForward 2

16.3 km/h

10.2 mph

Forward 3

22.2 km/h

13.8 mph

Forward 4

29.9 km/h

18.6 mph

Forward 5

40.6 km/h

25.2 mph

Forward 6

54.8 km/h

34 mphReverse11 km/h

6.8 mph

Operator and ISO 13459:2012 for Trainer.

• FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level

II for Operator and ISO 13459:2012 Level II for Trainer.

• Note: Welding on ROPS or making modifications to the ROPS mayvoid the ROPS certification. Please contact Caterpillar OEM Solutions
if the application requires welding on the machine frame.

Suspension• Maximum travel speeds with standard 33.00-R51 tires.

Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom
double shear clevis attachments

Body Hoists

Effective Cylinder Stroke - Front
Effective Cylinder Stroke - Rear

Twin, two-stage hydraulic cylinders with snubbing valve.
Pump Flow – High Idle

729.6 L/min

317 gal/minRelief Valve Setting – Raise

17 238 kPa

2,500 psi

Body Raise Time – High Idle

15.2 seconds

Body Lower Time – Float

16.2 seconds

Body Power Down – High Idle

15.9 seconds

Rear Axle Oscillation

320 mm

12.6 in

165 mm6.5 in+/- 5 degrees

Service Refill Capacities
Fuel Tank

1552 L

Diesel Exhaust Fluid (DEF) Tank

136 L

410 gal36 galCooling System

379 L

100 gal
54 galCrankcase

204 L

Front Wheels, Each

30 L

8 gal

Differentials and Final Drives

527 L

139 galSteering Tank

110 L

29 galSteering System (includes tank)

170 L

45 galBrake/Hoist System

511 L

135 galBrake Hoist System (includes tank)

606 L

160 galTorque Converter/Transmission System(Includes Sump)

175 L

46 galSteering
Steer Angle
Turning Diameter – Front
Steering Standards

36º29.8 m

97.75 ft

ISO 5010:2007

3

785 Off-highway Truck Bare Chassis Specifications
Dimensions
All dimensions are approximate.
10

11

8

7

94
6

3

5

12

2
1

20
21

1613 14

1915

1718

22

23
25
26
27
28
31

29

32

30

36
37

33
3534424

785 Off-highway Truck Bare Chassis Specifications
Dimensions
1 Overall Length ** (does not include Wheel Chocks)

9730 mm383.07 in

2 Wheel Base

5180 mm

203.94 in

3 Distance between Tires **2165 mm85.24 in4 Height to Top of ROPS **5208 mm

205.04 in

5 Rear Axle to Body Pivot

640 mm25.20 in

6 Distance between Body Pivot and Rear Axle

1618 mm63.70 in

7 Distance between Body Pivot and Hoist Cylinders - Horizontal

2251 mm

88.62 in

8 Distance between Main Beam and Top of Air Cleaner

1714 mm

67.48 in25.59 in

9 Distance between Main Beam and Engine Hood - Vertical

650 mm10 Distance between Main Beam and Engine Hood - Horizontal

268 mm

10.55 in

11 Overall Width

8100 mm318.90 in

12 Engine Guard Clearance **1038 mm

40.87 in

13 Distance between Hoist Cylinders

2348 mm

92.44 in

14 Distance between Body Pivots - Outer

1885 mm74.21 in

15 Distance between Body Pivots - Inner

1518 mm59.76 in

16 Body Pivot Bearing Width

175 mm

6.89 in

17 Distance between Frame Rails

1510 mm59.45 in18 Frame Rail Width

200 mm

7.87 in

19 Height of the Cab from Main Beam

2085 mm82.09 in

20 Cab Width

1804 mm71.02 in

21 Distance between Rocker Pads

3000 mm

118.11 in22 Overall Tire Width

6277 mm

20.58 in

23 Distance between Main Beam and Cab Front

2088 mm

24 Cab Front Angle

82.20 in
14 degrees

25 Cab Rear Angle

22 degrees

26 Distance between Main Beam and Cab Roof

1044 mm41.10 in

27 Distance between Main Beam and Cab Rear

53 mm

2.09 in

28 Main Beam Width

323 mm12.72 in

29 Rocker Pad Height

94 mm

3.70 in

30 Main Beam Height

340 mm

13.39 in

31 Distance between Body Pivot and Main Beam4662 mm

183.54 in

32 Body Pivot Outer Radius

120 mm4.72 in33 Body Pivot Pin Diameter

129.5 mm5.10 in

34 Distance between Body Pivot and Frame

230 mm35 Frame Slope Angle

9.06 in
7.5 degrees

36 Distance between Main Beam and Body Pivot Pin

425 mm16.73 in

37 Distance between Body Pivot and Hoist Cylinders - Vertical

194 mm

7.64 in** These dimensions may vary based on tire size, pressure and load. All dimensions are for reference only and may change for different machine configurations.

5785 Off-highway Truck Bare Chassis Specifications
Standard and Optional Equipment
Standard and optional equipment may vary. Consult your Cat dealer for details.
Standard Optional
POWERTRAIN
Cat 3512E diesel engine:• Automatic engine and DEF thermal• Automatic low voltage idle management• Air cleaner with precleaner (two)• Turbocharging (four) with air-to-air aftercooler• Mechanical Electronic Unit Injector• Automatic starter protection• Automatic ether starting aid• No air – electric starter with 93-amp hour
• Turbine air starter with air tank, air horn andautomatic lubrication system• Variable speed fan drive
Hydraulic braking system:• Automatic retarder control (ARC), adjustable• Brake release motor (towing)• Engine over speed protection• Extended life brake disc material• Hill start assist/Anti roll back strategy• Oil-cooled, multi-disc (front and rear) –service, retarding, parking, secondary• Park brake integrated with gear selector
Transmission:• 6-speed, automatic power shift with Electronic
Clutch Pressure Control (ECPC)• Advanced Productivity Electronic Control• Body-up reverse neutralizer• Body-up shift inhibitor• Downshift/reverse shift inhibitor• Directional shift management• Engine pre-lubrication system• Enhanced Traction Control System• Programmable top speed• Oil level sensor• Neutral coast inhibitor• Neutral start switch• Lock-up torque converter• Rear axle continuous lubrication/filtration

ELECTRICAL
24V electrical system, low maintenance batteries
Alarm, backup
Auxiliary rear work lights, (one) LH side
Brushless alternator, 225 amp
Digital Payload Display
Ground accessible power control box:
• Ethernet VIMS TM port and VIMS lamp
• Engine starter, transmission and battery lockouts
Jump start/battery charge receptacle
LED payload indicator lamps

6••

OPERATOR ENVIRONMENT
5V USB charging port
12V auxiliary power connection
Cup holders
Diagnostic connection port COM3 and Ethernet
Delayed Engine Shutdown
Dome courtesy light and map lights
Emergency stop
Entertainment radio ready:• Speakers • Antenna (AM/FM/WB/satellite radio)• Radio mounting provisions & 12V power supply
Fire suppression readyFloor mat, multi-piece & replaceable
Gauges and indicators panel:• Critical oil and coolant temperatures• Fuel and DEF level (if applicable)

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•••••••••••••••••••••••• Rear axle continuous lubrication/filtration withcooler• Engine system, brake and transmission faultindicators

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Standard Optional
LED Lighting system:• Back-up and hazard lights• Curb lights, (one) RH side, (one) LH side
• Turn signals (front and rear)• Engine compartment lights• Headlights with low-high beam selector• Ladder light and service deck lights• Stop/tail lights• Additional lighting package• Auxiliary VIMS
• Body rear
• Seat & park brake
Workshop horn

• Operator selectable max. machine speed byrotary dial
• Speedometer, Tachometer• Fuel and DEF level (if applicable)
Heated mirrors, right and left
Hoist, body control
Interactive touchscreen vehicle information display:• Day/night mode
• Action alarm• Quad gauge display
Operator air suspension seat
Operator Door Power Window
Provision for customer accessory mounting
Push button secure start
Retractable front visor
ROPS cab, insulated/sound suppressed
Stairway and walkway access, 600 mm (24 in)Steering wheel, tiltable, telescopic
Self-filling windshield washer fluid from ACcondensate•••••••••••••••••••••••••••••••
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785 Off-highway Truck Bare Chassis Specifications
Standard and Optional Equipment
Standard and optional equipment may vary. Consult your Cat dealer for details.
Standard Optional
Storage locations for operator gear
Three-point seat belt for operator seat

Secondary steering (automatic)••

Tie off points•

Tow hooks (front) and tow pin (rear)•Trainer air suspension seat
Windshield wiper, intermittent control / washer
Unitized hydraulic powered HVAC withautomatic temperature control
Ventilated operator seat

Standard Optional

•
••
•
•

Deluxe Cab:•

• Advanced cabin filtration system•• Catwalk and handrails for rear cab access•• Heated, cooled, and ventilated front seat•• Power right side window•• Suspended companion seat•

• Storage tray•

Sight glasses for hydraulic oils•

S•O•SSM sample ports•

Wheel chocks•

Wireless Electronic Technician (ET)•Working at heights protection•

CAT TECHNOLOGY PRODUCTS
Product LinkTM Elite
360 degree surround view camera•

2560 L (676 gal) fuel tank (non-Tier 4)••4G cellular/satellite dual mode•

Connectivity bundle (includes: wireless operator
ID, bluetooth key FOB to start)•Cyber security

OTHER EQUIPMENT•

Vital Information Management System (VIMS)•

Driver Safety System (DSS) 4.0 Ready•

Auxiliary “buddy” dumping quick connect•

Integrated object detection system

Auxiliary connection ‘user defined shutdown’•

MineStar GPS••

MineStar communication group•

Auxiliary steering quick connect (towing)•

Bumper towing – center pin kit•

Oil Renewal System (ORS) (non-Tier 4)•Cold weather start (block heater)•Road Analysis Control (RAC)••

Tire Payload Monitoring System 2 (TPMS 2)

Communication Ar – Minestar™ radioeOMM•

Fast fill fuel and DEF remote fill system•

Fire extinguisher, portable•

Five-piece crankcase guards•

Fuel heater, fuel water separator•

Fuel tank mud guard•

Gauge, brake wear indicator•

Ground accessible fluid service center, hydraulicand coolant•

Guards for rotating components•

Hill Start Assist•

Hub odometer, kilometers
Hydraulic Filters, 1,000 hours••

Powered access stairway
Remote flash software and troubleshooting
Rim Diffuser••••7

For more information on Cat Truck Bare Chassis, contact OEM Solutions:
oem_solutions@cat.com | www.cat.com/oemsolutions© 2024 Caterpillar
All rights reservedMaterials and specifications are subject to change without notice. Featured machines in photos may include additional
equipment. See your Cat dealer for available options.
CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow,” the “Power Edge”
and Cat “Modern Hex” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar
and may not be used without permission.

AEXJ0120-01 (01-2024)