No. M-201803

Instruction Manual for Gear Pump

NOTE:
Please read this manual carefully before using the pump inorder to obtain maximum performance.
Please keep this manual handy for reference.

DAITO KOGYO CO., LTD.

Contents

Safety precautions ................................................................................... 1
Handling of MC-Type Seal-Less Gear Pump .......................................... 2

Handling of mechanical seal type/oil seal type shaft seal part .......... 4
Preface .................................................................................................... 6
1. Outline of the gear pump .................................................................. 6
2. Installation ......................................................................................... 7
3. Piping ................................................................................................ 8
4. Operation .......................................................................................... 9
5. Abnormal phenomena during operation ......................................... 10
6. Maintenance ................................................................................... 11
7. Safety valve .................................................................................... 14
8. Procedure for long-term storage .................................................... 15
9. Period and scope of guarantee ...................................................... 15

Safety Precautions

Note the following when handling the pump:
1) Do not remove the safety cover of the rotating object while the pump is in operation.
2) In principle, replenish the lubricating oil only while the pump is stopped.
If you must replenish the oil while the pump is in operation for reasons such as you
cannot stop the pump, take great care to ensure safety although there is no structuralrisk.
3) Tighten the gland packing while the pump isTighten equally
stopped.
The gland packing on both sides should betightened equally and a little at a time.
Observe the operation condition, and tighten
further if necessary.
Over-tightening shortens the life due to thedevelopment of heat in the packing or
abrasion of the shaft.
4) Reinstall the V-belt while the pump is
stopped.
Reinstall to the reference 5) "tension" stated in section 6 “Maintenance” below, andcheck the degree of parallelism referring to section 2, “Installation.”5) If there is leakage from the shaft seal part or other parts, stop the pump before repairing
it or taking countermeasures.
6) If inspections or maintenance operations are done manually while the safety cover isremoved, turn off the power such that it cannot be turned on by mistake.
7) When removing the pump from the line, the fluid may spout from the flange as the flangebolt is loosened, so first drain the fluid completely through, for instance, the drainage ofthe pipeline.
8) When removing the pump from the line for inspections
or repairs, note it is dangerous to insert your finger into
the pump through the aperture.
9) In case of the circuit of a pipe which automatically
opens/closes, a partial impact pressure occurs due to asmall time lag generated upon opening/closing the valve
or starting/stopping the pump, which could damage
parts or cause fluid leakage. Consider this carefully inthe planning stage.
10) Do not operate the pump outside of its specifications. This could cause a serious
accident such as damage to the piping, pump parts, or equipment such as the motor.

-1-

Handling of MC-Type Seal-Less Gear Pump
1) Precautions for handling the magnet (permanent magnet) partsa) Handle the magnet parts carefully during transport or assembly, otherwise an
unexpected injury could occur such as your hand becoming trapped between
attracting magnets (if the north and south pole face each other) or other magnetic
objects such as metal.
b) Do not leave multiple magnets on the workbench at the same time or leave amagnetic object near a magnet. This could generate a strong attractive force, which
could trap the hand between magnets or other magnetic object, or damage themagnet. In unavoidable circumstances, take safety measures such as keeping
magnets and objects sufficiently far away from each other or interspersing a spacer.
c) Placing a magnetic product such as a magnetic tape, floppy disk, prepaid card, cashcard, or electronic clock near the magnet could destroy or magnetize the magnetic
data, making it unreadable.
d) If the product is handled by a person who uses an electronic medical device such asa pacemaker, it could hinder the normal functioning of the medical device and is very
dangerous. Never allow such a person to handle the product for any reason.
Similarly, do not place the product near a person who uses an electronic medical
device.
2) Storagea) Store the product in the designated packing condition such as attaching a cover forsafety and to prevent breakage and contamination.
b) Clearly specify by using a warning mark during storage that the product is magnetic.
c) Do not place the magnet near an electronic device because this could affect the
instrument or control panel, resulting in a failure or accident.
3) Disassembly of the Seal-Less Gear Pumpa) As stated in 1) and 2), assembly and disassembly of the pump involve risks such as
the difficulty of handling the magnet parts or generation of a large thrust force. In
addition, assembly and disassembly of the pump requires skill. For these reasons,when it is necessary to disassemble the pump for a regular inspection, for example,
send the pump body to our factory or request our service engineer to visit you.
b) If you must disassemble the seal-less gear pump for some unavoidable reason, use
the dedicated tool for disassembly. Please purchase it after consultation.

-2-

4)

5)

Use of the Seal-Less Gear Pump
Gland case
Ball bearingsa) Install a magnet filter in the piping on the pumpsuction side.
Oil sealb) When the MC-□□J type equipped with a jacket
is used, heat the gland case section with steam etc.
and cover the gland case and the rest of
the pump with heat-insulating material
Gland coverexcluding the gland cover section.
Inner magnet* If the gland case has a cooling vent,Outer magnet
air intake (air intake port), and grease drain,
avoid these sections when covering the pumpwith heat-insulating material.
Exchange the shield type ball bearings and the oil seal once every two years.
(The oil seal is installed as a dust guard.)
Refer to the lubricant list in the delivery diagram.

-3-

Handling of mechanical seal type/oil seal type shaft seal part
The mechanical seal type and oil seal type shaft seal parts have a gap for rotation to
restrict leakage. On the other hand, stopping the leakage completely increases thewear volume and torque and leads to burning of the seal edge surface or early wear.
The amount of leakage from the seal depends on the physical conditions,specifications of the sealed fluid, or operation conditions and is finely balanced. For
this reason, it is very difficult to identify technologically every single correlation among
the causes of leakage.
For these reasons, a small amount of leakage from the shaft seal part is allowed formechanical seal type and oil seal type gear pumps. Please note the following whenusing the product:
1)

2)

3)

4)

5)

6)

7)

While the pump is stopped, a pressure exceeding 0.1 MPa should not be applied,
as this will cause leakage from the shaft seal part or an increase of leakage
amount. Take care to ensure the pressure in the piping does not increase due toan increase of liquid temperature or opening/closing of the solenoid valve. Also,
note that the pressure is not applied to the pump when you carry out
pressure-proof and airtightness tests of the pipeline (refer to 3-7) on page 8 of thisdocument).
While the pump is operating, the inside of the pump is always decreased to a
constant pressure regardless of the discharge pressure and so leakage from theshaft seal part rarely occurs. However, if pushing pressure is applied from thesuction side, the inside of the pump is not depressurized, thus causing leakage
from the shaft seal part or an increase of leakage amount.
Misalignment of the shaft core may cause leakage from the shaft seal part or an
increase of leakage amount. When you install the pump and after the piping iscompleted, please be sure to carry out the confirmation and adjustment ofcentering (refer to 2-5) on page 7 of this document).
When the pump is activated or stopped, the liquid may ooze out from the end of
the shaft seal part; however, this is not a defect. Wipe it off with a waste cloth andobserve the process.
The allowable leakage amount from the shaft seal part of our company's pump iswithin [3 cc/Hr]. Since the allowable leakage amount may be increased dependingon the operating conditions, please contact us.
For maintenance and inspection of the shaft seal part, be sure to check the
lubrication oil list shown in the delivery diagram. If it is not shown in the delivery
diagram, please refer to page 11 of this document, or contact us.
If the leakage amount increases, replace the seal part with a new one, or contact
us. If the shaft seal part or bearing/side panel of the shaft is worn, note that merely
replacing the seal parts may not reduce or restore the leakage amount.

-4-

[Reference diagram]
Oil seal type: S typeO-ring
Tip part (shaft seal part)

Oil seal

Inside mechanical seal type: M type (EM type)O-ringOil seal
Tip part (shaft seal part)

Fixed seal ring

Rotating seal ring

Double bellows mechanical seal type: Tv2 type
Rotating seal ring
Oil seal
Tip part (shaft seal part)

Fixed seal ring-5-

Preface
Thank you very much for purchasing the gear pump(s) of the Daito Kogyo Co., Ltd.
All pumps are inspected and shipped ready for immediate operation. Upon receiving thepump(s), carefully open the packaging so as not to damage the equipment and check thefollowing:
1) Whether any damage or failure is visible2) Whether all the ordered items and spare parts and accessories are present
3) Whether the pump rotates smoothly by manually revolving the coupling or V pulley(If it rotates smoothly when you turn it by hand, it is normal even if it feels a little heavy.)
4) Whether the instruction manual of the driving machine is included with the product(For the handling of the driving machine, refer to the instruction manual of thedriving machine.)

1. Outline of the Gear Pump
A gear pump is a kind of rotary pump and is defined as a positive displacement pump. Gearpumps are roughly classified into external and internal gear types.
The pump which you purchased is of the external gear type. Its operating principle is, as
shown in the figure, that the fluid in the space between the valleys of the gears and thecasing is forced out to the opposite side when the two gears rotate.
The pump has unique structural characteristics:
1) Simple structure and handling.
2) The discharge is almost constant,regardless of variations in supply
pressure.
3) The desired discharge can be obtainedby changing the rotating speed.
Suction4) Any fluid, from low to high viscosity,
can be used.
5) With a strong self-suction power, it cansuction fluid from an underground tankor extract from a high vacuum tank. It
can be used widely for the supplyof chemical liquids, hazardous liquids,
and low- and high-temperature liquids.
6) A high pressure can be obtained
regardless of capacity and rotating speed.

-6-

Discharge

Basic Precautions on Using the Gear Pump
1) Be sure to install a strainer. If solid material isdrawn in, it may become trapped in the gear andInstall a safety valve
prevent rotation.
2) Do not use fluids other than the specified one orsimilar. Especially, using water for the oil pumpcould damage it.
3) Do not operate the pump with no fluid.
4) Install a safety valve. If the pipe on the dischargeside is closed the pump pressure may damage
the pump or could rise high enough to overload
the motor. Therefore a safety valve, integrated
or separately installed, is necessary.
No solid material should be mixed
5) The pump contains rust-preventive oil. If thisDo
not operate with water
could cause a problem, clean the pump interior
Do not operate without fluid
before performing piping.
6) All the disassembled and cleansed pumps aredegreased and dehydrated. Therefore, do not
operate them without fluid for any reason.
7) In principle, the directions of rotation cannot be reversed.
Contact us if reverse rotation is used.

2. Installation
Improper installation could affect the capacity or life of the pump, so note the following:1) The pump should be installed near the tank of the suction side.
2) Install the pump at the position where theinflux head is acquired. Especially when ahigh viscosity fluid is supplied, orInstall the influx headextraction from a vacuum tank, etc. in
Suction pipe is to be shorter
which a high negative pressure arises on
the suction side, the influx head isnecessary.
3) Allow sufficient space around the pump for
maintenance.
4) The surface of the foundation concrete
Secure space for maintenanceshould be level. If the pump is installed ona steel plate, resonance could occur, so
sufficient rigidity with the frame of thepump is required.
-7-5) Although the pump is centered prior to shipping, thereafter transportation, installation,etc. may cause the shaft center to deviate. Therefore, after installation and piping,confirm or adjust the center of the couplings or the degree of parallelism of the V pulleys.
- In case of direct coupling
Measuring should be done at the four points.
(* If the temperature of the pump could become high(higher than 100C), please contact us for safety.)a = not more than 0.05 mm
c – b = not more than 0.1 mm- In case of V-belt driven
d = not more than 0.3 mm
e = not more than 0.2 mm

Scale

V pulley
Scale* In the case of chain coupling, please contact us.

3. PipingNote the following regarding piping.
1) Ensure the pipeline is airtight. If air is sucked into the suction side pipeline from joints orothers, it will affect the capacity of the pump.
2) The pipeline should be supported on both sidesof the pump, so that the stress and weight of the
Install a strainer
pipeline do not act on the pump.
Install a valve3) Install valves and pressure gauges (orCompound gauge
compound gauges) on both sides of the pumpPressure gauge
for maintenance. If high viscosity fluid is supplied,
install a gate valve or other low-resistance valve
on the suction side. In case of screw jointing,union joints should be used on both sides of thepump.
4) When the pump suctions fluid from an
Install supports
underground tank or the piping of the suction
side is long, install a non-return valve on thepiping on the suction side so that the fluid inside the piping will not drop. When the piping
on the discharge side is long, install a non-return valve on the pump outlet. For fluids thateasily vaporize such as solvent and gasoline, install a relief valve so that the internalpressure will not act on the pump.
5) Install a strainer on the suction side. The strainer should be of 40 mesh or higher andlarger enough to make the pressure loss less than 20 kPa in relation to the viscosity of
the fluid and flow rate.
-8-6) If the pump has a jacket, the piping should be arranged so that the steam comes in fromthe upper side and goes out from the under side, while the heating medium, coolingwater or other fluid comes in from the under side and goes out from the upper side.
Steam

Heating medium,cooling water, etc.

* During the in-houseinspection, we may pourthe heating medium into
the jacket; please notethat this heating medium
may remain in the jacket
when you use it withsteam.

7) During pressure-proof and airtightness tests of the pipeline, take care not to applypressure to the pump. The oil seals and mechanical seals may be damaged by the sealleakage or pressure during non-operation.
8) Upon completion of the piping works, clean the inside of the pipeline to remove all
welding waste, steel scraps and other foreign materials which would damage and bitethe pump if drawn in.

4. Operation
Take the following precautions before starting operation.
1) Check that the installation, piping, etc. are complete and all the valves on the suction
and discharge sides are fully open.
2) Before starting operation for the first time after installation, check the pump able tooperate by manually rotating it, especially the coupling or V pulley.
3) Check that the supplied fluid will allow the pump to operate. In particular, check thetemperature control in case the fluid hardens at ordinary temperature, and remove blind
areas for piping works, etc.
4) For a jacketed pump, check that the steam or cooling water is flowing.
5) If the inside of the pump is cleaned and dried, take great care not to idle the pump. Be
sure to draw the fluid into the pump sufficiently before operating it for the first time.
6) The necessary lubrication oil is filled up when the product is shipped from the factory.
However, for special seals or pumps specified by the customer, the shaft seal partmay be "empty" when the product is shipped (a tag stating "shaft seal liquid has
been discharged" is attached). Before operation, be sure to check it and fill the liquid
if necessary.
7) Some models of large geared motors and reduction gears, which are the motors
delivered with the pumps, do not contain lubricating oil. Check the instruction manual ofthe motors before starting operation.
8) Switch on and off instantaneously and check the right and reverse directions of rotation.
9) Then switch on and check that the ampere meter, pressure gauge, and compoundgauge are normal.
10) If handling a hot fluid, pre-heat the pump or gradually heat up the fluid’s temperature. If
the pump is subjected to a sudden change of temperature, it may not operate due tothermal expansion.

-9-11) If the shaft seal of the pump is the gland packing type and the pump is cleaned and dried,
a lot of fluid leakage and suction failure/capacity degradation due to air suction may
occur at the first time of using the pump. In that case, adjust the tightening of the glandpacking (refer to 3) on page 1 and 6-2) on page 10).

5. Abnormal Phenomena during Operation
If the pump has been working normally and then starts making a noise or the pressure orcapacity decreases, or if it consumes an unusually large amount of power, check thefollowing.
1) If air is sucked from the suction pipe or gland, if a volatile compound in the fluid
evaporates and produces vapor, or if the fluid contains air bubbles, the pump will
generate an unusual noise, the capacity will decrease, and the needle of the pressuregauge on the discharge side will deflect irregularly.
2) Clogging of the strainer will cause noisy cavitation and reduce the capacity andpressure.
3) If the viscosity of the fluid rises higher than as specified, the power needed for the pumpwill increase accordingly. Further, if the viscosity rises conspicuously, the pump will
generate cavitation and noise, decreasing its capacity and pressure.
4) If the viscosity of the fluid becomes conspicuously lower than the specified value, theinternal leakage of the pump will increase and the capacity and pressure will decrease.
5) If foreign matter enters the valve seat of the safety valve or the spring is damaged, thecapacity and pressure will decrease.
6) If the center of the couplings extremely deviates, the pump will make a noise/vibrationand the power consumed will increase greatly, which could eventually break the shaft.
7) If the discharge pipeline becomes clogged, the valve’s opening is narrowed, or the
fluid’s viscosity increases unusually, the discharge pressure will exceed the specified
value and the power consumed will increase greatly.
8) If the pump interior becomes severely worn over time (especially when fluid containing aslurry is used), noise will occur and the capacity and pressure will decrease.
Also, wear of the bearing causes the gear to contact the casing, resulting in overloading.
If this happens, the parts should be replaced.
9) If the current speed is abnormally fast, disturbed flow is generated in the pipe andvibration or noise may be generated. In this case, please consider modifying theflow rate and the piping.
10) Instantaneous blocking operation is caused by starting/stopping the pump and soa slight time lag of opening/closing of the valve on the piping on the dischargeside and local impact pressure or water hammer phenomenon may occur. As aresult, damage to the pressure gauge, liquid leakage from the shaft seal, etc.,
vibration/noise of piping, or damage to the pump, etc. may occur. To prevent
water hammer, set the opening and closing of the solenoid valve etc. so that thevalve is closed after the pump is stopped and the pump starts up after the valve
is opened. However, note that the pump may rotate under its own momentum fora few seconds after the power supply is turned off.
- 10 -

6. Maintenance1) Perform disassembling inspection and maintenance every two years to ensure
continued long-term efficient operation.
2) For a pump with gland packing at the shaft seal part, note the following.
a) Do not over-tighten the packing which completely stops leakage from the gland.
Leakage of a drop every two or three minutes is normal and necessary for
lubricating the gland part.
Over-tightening the packing causes unusual heat, accelerating abrasion of the shaft.
b) If there is no interference at the gland, add another packing. The whole packing
should be replaced if you cannot stop the leakage, or when disassembling forchecking.
c) Insert the gland packing as follows:
The packings should be placed such
- Cut it so that there will be no gap when it isthat the cut end of each ring packing is
set as a ring. Cut with a sharp cutter toon the side opposite to the next one
an adequate length.
- When inserting the gland packing, thepacking should be placed such that the cut
end of each ring packing is opposite to the next
one, with lubricant applied to the friction surface.
3) When you stop the pump or if it stops due to a power loss, switch off and close thevalves on the suction and discharge sides.
4) The strainer in the suction side should be regularly cleaned to prevent harmful clogging.
5) In case of the V-belt, determine the suitable tension upon reinstallation as follows:a) Find the span length of the belt.
Span lengthb) Apply a load to the middle of the span
length in the direction perpendicular to the belt,
Loadand use the deflection amount at the time
Deflection
as a measure of the tension.
amountExplanation:
For the A-type belt having the span length of
Suitable tension of V-belt
450 mm, as shown in the graph on the right,
apply a load of 7 to 10 N and reinstall the belt Deflection Load (N)(mm)
so that the deflection becomes about 10 mm.
Load on D-type
60
20 506) Lubrication
Deflection amount
Load on C-type
16 40
All the necessary lubricants are filled before
the pump is shipped from our factory, except
12 30
Load on B-type
the parts that require perfect degreasing.
08 20
Load on A-type
If lubrication is necessary, refer to the lubrication 04 10
Span length (mm)oil list shown in the delivery diagram.
100 200 300 400 500 600 ７00 800 900 1000
If it is not described, perform lubrication periodically
300 has passed between
after operation based on the table shown below. If a long300time
manufacture and the test run, check the lubricating oil before starting operation.
300 300
Refer to the lubricant list in the delivery diagram for MC-Type.

- 11 -

Places tobelubricatedBearing
portionType of pump

OH-type

KSR-BS type

Illus- Name of lube Lubricating Supplementary Exchange
Remarks
tration oil
methodlubricatingtime orperiodperiod④
Grease lithium Grease cup Every 6
At the time oftype Density
monthsreassembling
No. 1
③
Ditto
Ditto
Ditto
Ditto

KSR-BSM type ③

Turbine oil
VG-32

Oil bath

Ditto

2 years

OthersOiling is not necessary.
Note 1: Primarily the pump is self oiled by the supplied fluid, so pumps of other types than theabove do not need oiling.
Note 2: If there is no grease cup on the OH-type pump, oilless bearings are used and oiling is
not required.
Shaft seal Oil seal typeportion
KSR-S, VSR-S
Oil seal type①
Other than
KSR-S, VSR-S

GreaseGreaseTurbine oil
VG-32

Oil bath①

Ditto

Double-bellows ②
mechanicalseal type

Ditto

SingleMechanicalseal type

Not
At the time ofnecessary. reassembling
Every 6
2 yearsmonthsSee p. 12 for

Ditto

Ditto

Ditto

Not necessary
for OH-M type

Ditto

Ditto

Ditto

the HP-S2 andKH-S2 types.

Gland packing Oiling is not necessary.
type
Note 3: For customer’s special designation and the status of use, for compatibility with the
supplied fluid, or for a special mechanical seal, information on lubrication will be
provided separately for each case.

Refer to the delivery diagram, or contact us.
Guide gear OH-G typeportion

Other types⑤

Grease lithium Grease cup Not necessary 8,000 hrs or Fill the oil totype
1 yearthe level ofDensity No. 1
the center ofthe upper sidegear.
Oiling is not necessary.

Note 4:

Do not fill the oil fully, but fill it to approximately 80% of the full level, and allow an air
pocket.
Note 5: Use the lubrication and replacement times shown in this table as a guide.

- 12 -

7) Maintenance of the HP-S2 and KH-S2 typesa)

A Teflon oil seal is used to seal the shaft.
Fill seal liquid (liquid seal type) to prevent abrasion of the shaft and the oil seal aswell as increase airtightness at the seal portion. Replace the seal liquid once every
three months (Fig. (1)).
The seal liquid is decided through discussion. Please contact us.

b)When contamination of the seal liquid becomes noticeable and the supplied fluid
leaks out from the end of the shaft, the oil seal has come to the end of its life. In
this case, it is necessary to replace the oil seal and the end bearing. The oil seal
and the seal adapter are available as a seal set. It is recommended to keep one
set as a spare for maintenance.

c)

When removing the seal unit, do not scratch the shaft portion for any reason. (It iscoated with ceramic.)d)

For lubrication of the bearing portion, replenish grease or turbine oil once every six
months (Fig. (2)).

Ⅰ

Seal case (A)

1 pc

Ⅱ

Seal case (B)

1 pc

Ⅲ

Oil seal

4
pcs *

Ⅳ

Packing4
pcs

ⅤBall bearing

1 pc

Ⅵ

Bearing oil seal

1 pc

Ⅶ

Stop ring

1 pc* The HP-2S2 and HP-3S2 types have three oil seals and their structures differ from theabove drawing.

- 13 -

7. Safety Valve
In case a safety valve is integrated in the pump or it is installed separately, follow the
instructions below. The safety valve is of the spring reflux type. If the pressure in the pipeline
exceeds the fixed level, the valve is opened by the force of the spring and the pressure isreleased to the suction side.
Cap1) Adjusting the pressure
To adjust the pressure, take off the cap on the upper-mostpart of the valve, and turn the adjusting screw clockwise toincrease the pressure or counterclockwise to reduce the
Adjusting screw
Note 1
pressure. *(The safety valve is set at the specified
pressure at the factory. Unless otherwise required, do nottouch it.) The pressure of the valve is basically set to plusⒶ
0.05 MPaG against the differential pressure of the pumpspecifications when it starts blowing. (There are exceptions.)
2) Disassemblya) When disassembling the safety valve, completely loosen
the adjustment screw first.
b) Then, it can be easily disassembled by removing the parts from the upper ones inturn.
c) If you measure “A” shown in the illustration before
disassembling, you can get the same pressure byreassembling to the same “A” measurement. *Note 2d) The KR type has different safety valve structures
Valvefrom the structure in the above drawing.
Contact us if disassembly is necessary.
3) Notes on usea) The safety valve is designed to ensure safety against abnormal situations. If you
close the circuit on the discharge side and make the safety valve work for a longtime, the temperature of the fluid will rise and a trouble may occur.
Do not use the integrated safety valve for adjusting the pressure or flow rate.
b) Contact us if the separately installed safety valve is used for adjusting the pressureor flow rate.
c) Contact us if the integrated safety valve and the separately installed safety valve areused at the same time.
d) A small amount of leakage of solution from the case and seat surface of thevalve main unit or leakage generated when the cap is removed is not a defect.
e) If the separately installed safety valve is used, release the air in the pipe. If the air
remains in the pipe, it may cause abnormal noise during operation.
* Note 1: Contact us for pilot-type safety valves (LFP type, KH/OH/
KS/VS-RP type) because the direction of the pressureadjustment screw as shown in above 1) may differ.
* Note 2: If the pilot-operated safety valve is used,flow the fluid while setting the pressure.
- 14 -

8. Procedure for long-term storage
When the pump is to be stored for a long time, store it following the procedure below.
1) Rust prevention of uncoated portionsa) Fill lubricating oil to the inner side of the gear pump, and apply it to the whole innersurface by hand.
b) Apply rust-preventive oil to the gear pump coupling and anchor bolt.
c) Seal the aperture flange of the gear pump using an oil-resistant packing.
d) Inspect the pump once every six months.
2) Storage until test runa) In principle, store the pump indoors free from moisture. If it is necessary to store thepump outdoors for an unavoidable reason, cover the pump with a sheet etc. toprevent it from being exposed to rainwater directly.

9. Period and scope of guarantee
1)
2)

3)

4)
5)

6)

7)

The guarantee period is one year after the delivery date. However, repair parts
do not have a guarantee period.
If a failure or damage is caused by our defect in manufacturing, and if the
product is used properly following the meeting based on the specification during
the guarantee period, we will repair the broken or damaged part without charge.
Repair or failure or damage and replacement of parts in the following cases will
be carried out with charge:a) Failure or damage after the guarantee periodb) Failure or damage caused by abnormal use or storagec) Failure or damage caused by using any parts that are not specified by usd) Failure or damage caused by repair or modification that is not carried out or
specified by use) Failure or damage caused by accident such as fire, natural disaster, earth
shock, and accidental force
If the product according to standards or materials specified by the customer
causes failure or damage, we will accept no responsibility for it.
To ensure corrosion resistance, we select the material based on the actual
performance. We cannot compensate for chemical or fluid corrosion caused byhandled liquids, defects caused by liquid quality, or failure. Note that we selectrecommended materials at the time of the contract based our current knowledge;
the corrosion resistance, etc. of the material is not guaranteed.
Note that we cannot compensate for operating losses to the customer such as
auxiliary construction and transportation costs or other losses, caused byremoving or installing the pump due to a failure during use.
If there is doubt as to the cause of failure or damage, we will make a decision
after discussion with the customer.

- 15 -DAITO KOGYO CO., LTD.
Head office:7-52-1, Nishiogu, Arakawa-ku, Tokyo 116-0011, Japan
TEL: +81-3-3893-4811
FAX: +81-3-3893-4820

Osaka office:5th Fl., AXIS-Honmachi Bldg., 1-2-1, Nishi-Honmachi,
Nishi-ku, Osaka-city, Osaka 550-0005, Japan
TEL: +81-6-6532-9074
FAX: +81-6-6532-9073
URL: http://www.gearpump.co.jp/
E-mail: daito@gearpump.co.jp