YAMADA SH-125B Series User manual

Doc. No. APP 079U-03
Pump 125 separate type series
SH-125B□MODEL No.854592・854594・854596 (SIPHON TYPE)
DR-125B□MODEL No.854593・854595・854597 (DRUM TYPE)
SH-125B□-V MODEL No.854598・854600・854602 (SIPHON TYPE -V)
DR-125B□-V MODEL No.854599・854601・854603 (DRUM TYPE -V)
WARNING
Prior to operating this pump, be sure to read this operation manual for safety. After reading the manual,
please keep it at hand any time for your quick reference.
INSTRUCTION

1/4
- Preface
Thank you very much for purchasing Yamada Pump. This pump, driven by the compressed air from an air compressor, is
designed to pump out or transfer lubricant from drum cans or other vessels.
125 series pumps are powered by compressed air and designed to transfer low viscosity material such as oil from a drum or
other containers.
For transferring solvent (paint, lacquer, thinner etc.), “-V” type pumps in 125 series are available.
- For Safe Operation
This document describes the items that are important for the user to operate this product safety, correctly, and efficiently.
Before operating this product, read this manual thoroughly, in particular, “Warnings and Cautions” at the beginning of this
manual, with a good understanding of its contents. Keep this manual carefully in an easy-to-access place so that the user
may refer to it whenever necessary.
- Warnings and Cautions
For safe use of this product, be sure to note the following: In this document, warnings and cautions are indicated by symbols.
These symbols are for those who will operate this product and for those who will be nearby, for safe operation and for
prevention of personal injury and property damage. The following warning and caution symbols have the meanings
described below. Be sure to remember their meanings.
WARNING : This indicates the existence of potential hazard which, if not avoided, will result in
death or serious injury.
CAUTION : This indicates the existence of potential hazard which, if not avoided, may result in
bodily injury or in physical damage.
Furthermore, to indicate the type of danger and damage, the following symbols are also used along with those mentioned
above:
This symbol indicates an act that is prohibited (prohibition). The concrete contents of prohibition are indicated
by the side of the indication.
This symbol indicates the contents that must be observed. The concrete contents of observance are indicated
by the side of the indication.

2/4
- Precautions on Use
The following warnings and cautions are very important. Be sure to observe them.
WARNING
[Operating condition]
- Restriction on handling
Never let anyone operate this unit without understanding this manual.
- Read this manual thoroughly before use.
For your safety, read and understand all information provided in this manual.
If you have lost or damaged your instruction manual, please contact us or our distributor to place an order.
[Operating method]
- Keep your face away from the exhaust and discharge ports.
Material may suddenly come out. There is a possibility of losing eyesight if it strikes eyes.
- Connecting ports
Keep your fingers away from each port to avoid injury from moving parts.
- Understand this manual completely before operating the machine.
The operator and maintenance engineer should read the operation manual thoroughly before operating the
pump and performing maintenance in respect of this pump.
- Do not use inappropriately.
Use of the product for any purpose other than those specified in this manual may result in personal injury or
property damage.
Be sure to use the unit in accordance with the specifications in this manual.
- Wear proper safety equipments.
Always wear proper safety equipments (facemask, ear plugs, and safety shoes, etc.) when installing,
operating, and disassembling the pump.
- Ground connection
Make ground connection to pump and peripheral equipment. Rapid pumping of material can result in static
electrical charge. Also, be sure to provide proper ventilation where a flammable atmosphere may exist.
- In case of abnormality
If there is any danger or abnormality, discontinue pump operation and refer to Troubleshooting to solve the
problem.
- Do not run the pump dry.
Stop pump operation immediately when a drum becomes empty. Running the pump dry will cause excessiv
Be especially careful when pumping explosive material. Mixture of an air and vaporized material can
explode. If there is any possibility of running dry, install a dry-run protection device like a liquid level control.e
vibration, resulting in reduction of pump life and damage to other equipment.
[Installation and piping]
- Air supply pipe
Attach a valve (for stop in emergency) or regulator to the air supply pipe to keep supply air pressure under
0.7MPa.
- Check strength of mounting surface.
(SH type only) If using a wall mount bracket for installation, the must be strong enough to withstand vibration
of the pump.
[Disassembly, maintenance and inspection]
- No alternation is permitted.
Alternating the unit may result in personal injury or product malfunction. Please do not try to alter, modify, or
change the machine.
- Never use gasoline or any other volatile material.
Gasoline is a high volatile fuel. Never use for cleaning of the unit in any case. Risk of fire or explosion may
exist.

3/4
WARNING
- Some materials can be detrimental to the environment.
Do not discharge material directly onto the ground. Dispose of harmful materials according to the
requirements specified in SDS or local regulations. Also, dispose of pump according to the local regulations
after removing residual material from inside pump. (Please contact industrial waste disposal service.)
- Daily checkup
Execute the daily checkup.
- Shut off air supply.
Before maintenance involving disassembly, be sure to shut off air supply to the pump and release residual air
pressure and material pressure in the tubes and pump. Failure to do so may result in material gushing out.
- Replacement time for consumables
The life of consumables varies depending on operating conditions. Replace a degraded part with a new one.
CAUTION
[Installation and piping]
- Install an emergency stop valve.
Attach an emergency stop valve to the air piping (somewhere accessible between the air source and unit)
and close this valve in case of emergency.
- Stop operation.
If any abnormality is found during operation, immediately stop the machine. Do not restart until the cause has
been identified and corrected.
- Shut off air supply.
Shut off the air source before installation and piping.
- Install properly.
Install the unit properly according to the requirements for location and material, pressure resistance, and size
of hoses and other device, avoiding lift operation failure and pipe leakage or breakage.
- Measures against rainwater and dust
Take protective measures against rainwater and dust. It is likely to lead to the pollution of the material.
- When installing the pump
Be very careful about your posture when installing the pump. Back injury may be caused by lifting the pump.
Be very careful about the edge of the pump when you lift the pump. Your hands might be injured.
- When installing the drum
(DR type only) Place a drum on a flat, level surface to position pump horizontally against a ground. Operating
the pump on a slope may cause a fall or tip-over due to shift in center of gravity caused by change in the
material level.
- Do not plumb directly.
Do not connect the material outlet and piping directly. Attach a flexible tube like a hose to connect the pump
to the piping. The pump, if connected directly to the piping, may cause many problems (e.g., noise caused by
vibration, damage to the piping, operation failure of the lift, and failure of maintenance).

4/4
CAUTION
[Handling]
- Keep hands and fingers away from the pump during operation.
Keep hands and fingers away from the pump during operation to avoid injury from moving parts.
Do not touch the surfaces of the pump and the hose when pumping high-temperature material. Risk of burns
exists.
- In case of emergency
In case of emergency, close emergency stop valve
- Maximum operating pressure of the pump
Do not exceed the maximum operating pressure of the pump (0.7MPa).
- Material
Use pump for the material suitable for the specification. Parts may be corroded and material leak from the
damaged parts can lead to environmental pollution. Also, follow handling notes (SDS) of the manufacturer
about the handling of the material used.
- Fall-prevention measures
Take fall-prevention measures if using a slim or light tank. Risk of falling will be increased due to shift in
center of gravity caused by change in the material level in a tank.
When using a bung adapter, to prevent the pump from falling over, hang the pump with a crane etc.
- When Replacing drum
(DR type only) Material remaining inside or on the surface of the pump may spill out by inserting or removing
the pump into from a drum. Be very careful not to get your clothing dirty.
[Shutdown and storage]
- When left unused for a long time (an week or more) or shutdown
Shut off air source after work and nighttime, holidays, or when the pump is not in use for a while. Also, open
the valve at the discharge port to release residual pressure in the pump and hoses. Failure to do so may
result in damage to the hoses or facility pollution due to leak from the valve. The use has a responsibility for
such secondary accidents.

Table of Contents
- Preface
- For Safe Operation
- Warnings and Cautions
- Precautions on Use
- Table of Contents
1. Part Names
1.1 Part names ······························································································ 1
1.2 Contents of a package···························································································· 1
2. Operating principle ···················································································· 1
3. Preparation of Installation and Operation························································ 2
3.1 Pump installation··································································································· 3
3.2 Installation of drum pump(Using a drum cover) ···························································· 3
3.3 Installation of drum pump(Using a bung adapter) ·················································· 3
3.4 Installation of siphon pump ······················································································ 4
3.5 Installation of silencer····························································································· 4
3.6 Connecting the ground wire····················································································· 4
3.7 Discharge piping ··································································································· 5
3.8 Air piping ············································································································· 5
3.9 Preparation for use ································································································ 5
4. Operating Method······················································································ 6
4.1 Operation switch and valve······················································································ 7
4.2 Solvent cup ·········································································································· 7
4.3 Filling delivery piping with material ············································································ 8
4.4 Operation ············································································································ 8
4.5 Retightening gland packing ····················································································· 8
4.6 When container is empty (changing drum) ·································································· 8
4.7 After work ············································································································ 8
5. Maintenance and Inspection ········································································ 9
5.1 Maintenance and Inspection ····················································································10
5.2 Troubleshooting ····································································································11
5.3 Consumable ····························································································· 12
5.4 Design standard use period ··········································································· 13
6. Parts Disassembly Drawing and Parts List······················································ 13
7. Specifications ··························································································· 19
8. Limited Warranty ······················································································· 22

1
1. Part Names
1.1 Part names
1.2 Contents of a package
Unpack and check the pump for any damage.
2. Operating Principle
Yamada's air-powered pumps employ reciprocating motion system
driven by compressed air.
It is comprised of two sections as illustrated at right; air motor section
which drives the pump and lower pump section which pump up
material.
When compressed air, generated by the compressor, is fed into the
air motor, the air switching mechanism built in the air piston actuates
vertical reciprocating motions. The connecting rod, joining the air
piston inside the air motor and the piston inside the lower pump,
transmits the movement to the piston inside the lower pump, giving
vertical reciprocating strokes.
Vertical reciprocating motions, generated by the lower pumps, feed
material into the lower pump. Then, it is pumped out of the discharge
port.
Fig. 1 Part names
Fi
g
. 2

2
3. Preparation of Installation and Operation
WARNING
- Keep your fingers away from each port to avoid injury from moving parts
- The pump weighs about 30kg. Be careful not to let the pump fall over or get crushing injury during
installation.
- Always wear proper safety equipments (facemask, ear plugs, and safety shoes, etc.) when installing,
operating, and disassembling the pump.
- Make ground connection when working with flammable material or in explosive atmosphere. Rapid
pumping of material can result in static electrical charge. Also, be sure to provide proper ventilation
where a flammable atmosphere may exist.
- Attach a valve (for stop in emergency) or regulator to the air supply pipe to keep supply air pressure
under 0.7MPa.
- (SH type only) If using a wall mount bracket for installation, the wall must be strong enough to
withstand vibration of the pump.
CAUTION
- Keep hands and fingers away from the pump during operation to avoid injury from moving parts.
Do not touch the surfaces of the pump and the hose when pumping high-temperature material. Risk of
burns exists.
- Attach an emergency stop valve to the air pipe (somewhere accessible between the air source and
unit), and in case of emergency, close this valve.
- If there is any danger or abnormality, discontinue pump operation and refer to Troubleshooting to solve
the problem.
- Shut off the air source before installation and piping.
- When installing the pump, select an appropriate place and suitable piping material, pressure
resistance, and size to avoid leakage and damage to the piping.
- Take protective measures against rainwater and dust. It is likely to lead to the pollution of the material.
- Be very careful about your posture when installing the pump. Back injury may be caused by lifting the
pump.
- Be very careful about the edge of the pump when you lift the pump. Your hands might be injured.
- (DR type only) Place a drum on a flat, level surface to position pump horizontally against a ground.
Operating the pump on a slope may cause a fall or tip-over due to shift in center of gravity caused by
change in the material level.
- Do not directly connect the piping to the pump. Be sure to use a flexible tube like a hose to connect
between the pump and piping. Direct connection damages the piping by vibrations when running the
pump, causes noises, and in case of the drum pump, makes it impossible to replace the drum can and
disables maintenance of the pump.
- Take fall-prevention measures if using a slim or light tank. Risk of falling will be increased due to shift in
center of gravity caused by change in the material level in a tank.
- When using a bung adapter, to prevent the pump from falling over, hang the pump with a crane etc.

3
3.1 Pump installation
Refer to Fig. 3 for mounting dimensions of the pump. Make sure the environment to install the pump satisfies the
following conditions:
- A flat surface indoor (area where exhaust from the pump does not affect peripheral equipment)
- Enough space to perform maintenance
3.2 Installation of drum pump
(Using a drum cover: DR-125B3.5, DR-125B5)
1) Secure the pump to a drum cover (sold
separately) and mount it on an open top drum.
2) When installing on a drum, use a crane to lift up
the pump with the eye nut on the top.
3.3 Installation of drum pump
(Using a bung adapter: DR-125B13)
1) Remove a plug on a drum and attach a bung adapter (sold
separately).
2) Insert the pump into the bung adapter. Once the lower end
(foot valve) reaches the bottom of the drum, lift up the
pump 2-3 cm above to make space between the foot valve
and the bottom of the drum. Then, secure a wing screw on
the bung adapter to set the pump in place.
When installing on a drum, use a crane to lift up the pump with
the eye nut on the top.
To prevent the pump from falling over, keep hanging the pump
with a crane.
CAUTION
- When using a closed type drum, loosen a vent plug
to avoid creating a vacuum.
Fig. 3 Pump mounting dimension
Fig. 4
Fig. 5
3.5×1
5×1 13×1
A : Dimension of
mounting plate φ152 φ122
B : Bolt hole P.C.D.168 P.C.D.140

4
3.4 Installation of siphon pump
(Using a wall bracket)
1) Attach a wall bracket (sold separately) or a panel
unit (sold separately) to the pump. Or secure the
pump to a mounting.
2) Connect a suction hose assembly (sold
separately) to the pump.（Fig. 6）
3.5 Installation of silencer
CAUTION
- Each connection is capped. Remove the caps all.
- Wrap sealing tape around the silencer thread to prevent leakage.
Attach the silencer to the pump and secure it using a tool. (Fig. 7)
Wrap sealing tape around the silencer thread to prevent leakage.
3.6 Connecting the ground wire
WARNING
- Make ground connection when working with flammable material or in explosive atmosphere. Rapid
pumping of material can result in static electrical charge. Also, be sure to provide proper ventilation
where a flammable atmosphere may exist.
1) When installing the pump, be sure to connect the ground wire at the
specified position. For the specified position for connecting the ground
wire, see [1. Names of parts and materials].(Fig. 8)
2) Also connect ground wires to peripheral equipment and piping.
3) Use 2.0mm2minimum ground wire.
Fig. 7
Fig. 8 Position for connecting
the ground wire
Fig. 6

5
3.7 Discharge piping
1) Connect a discharge hose to the pump outlet. Make sure the hose satisfies the following requirements:
- Resistant to material being pumped and unaffected by environment
- Satisfying the following normal operation pressure:
- 3.5×1 ratio pump : 2.45MPa or more
- 5×1 ratio pump : 3.5MPa or more
- 13×1 ratio pump : 9.1MPa or more
- A flexible hose with an adequate length in order not to be affected by replacing a material container
- When mounting the pump on an elevating machine like a lift, be sure to use a flexible hose with an adequate
length in order not to be affected by up-and-down movement.
- Recommended size: 1 inch or 3/4 inch or more
- Hose fitting or joint: Connectable to Rc1 or Rc3/4 material outlet
- A relief valve (required)
2) Connect the other end of the hose to a delivery pipeline or oil gun (sold separately). Attach a valve at the
connection between the hose and the piping for maintenance and keep it closed until unit installation is
completed.
3.8 Air piping
1) Connect air piping equipment such as an air valve and air regulator to the air inlet of the pump. Attach an
emergency stop valve to the air pipe (somewhere accessible between the air source and unit).
2) Select an air supply hose, fitting, and air equipment that satisfy the following requirements. With these devices,
connect an air piping and the air inlet. Be careful not to let the hose get caught on peripheral equipment.
- Designed for use with air and unaffected by environment
- Normal operation pressure: 0.7MPa or more
- Recommended size: 3/8 inch or more
- A flexible hose
- Comfortable hose length for up/down movement of the lift
- Hose fitting or joint: Connectable to Rc3/8 air inlet
- Flow rate: 1300L/min (ANR) or more
NOTE
The air regulator controls supply air pressure to the pump. Accordingly, the pump operates efficiently without
unnecessary movement and thus the life of the pump can be extended.
3.9 Preparation for use
WARNING
- Gasoline is a high volatile fuel. Do not use it to clean the pump in any case, otherwise ignition or
explosion may be caused.
CAUTION
- Following materials are used for packings and O-rings. Please do not use solvent that corrode these
when washing pump.
- 3.5x1 and 5x1 pump except “-V” series … NBR, PTFE
- 3.5x1 and 5x1 pump “-V” series …………. FKM, PTFE
- 13x1 pump except “-V” series ……………. NBR, Leather
- 13x1 pump “-V” series …………………….. NBR, Leather
The pump has been tested using mineral oil before delivery. Please wash inside the pump with appropriate solvent for
the material being pumped.

6
4. Operating Method
WARNING
- Keep your face away from the exhaust and discharge ports. Material may suddenly come out. There is
a possibility of losing eyesight if it strikes eyes.
- Keep your fingers away from each port to avoid injury from moving parts.
- Do not discharge material directly onto the ground. Dispose of harmful materials according to the
requirements specified in SDS or local regulations. Also, dispose of pump according to the local
regulations after removing residual material from inside pump. (Please contact industrial waste
disposal service.)
- The operator and maintenance engineer should read the operation manual thoroughly before operating
the pump and performing maintenance in respect of this pump.
- Use of the product for any purpose other than those specified in this manual may result in personal
injury or property damage.
Be sure to use the unit in accordance with the specifications in this manual.
- Always wear proper safety equipments (facemask, ear plugs, and safety shoes, etc.) when installing,
operating, and disassembling the pump.
- Make ground connection when working with flammable material or in explosive atmosphere. Rapid
pumping of material can result in static electrical charge. Also, be sure to provide proper ventilation
where a flammable atmosphere may exist.
- If there is any danger or abnormality, discontinue pump operation and refer to Troubleshooting to solve
the problem.
- Stop pump operation immediately when material in a container is all gone. Running the pump dry will
cause excessive vibration, resulting in reduction of pump life and damage to other equipment.
Be especially careful when pumping explosive material. Mixture of an air and vaporized material can
explode. If there is any possibility of running dry, install a dry-run protection device like a liquid level
control.

7
CAUTION
- Do not exceed the maximum operating pressure of the pump (0.7MPa). Overpressure may cause a
product failure resulting in serious personal injury and/or property damage.
- In case of a pump malfunction or shutdown, refer to “5.2 Troubleshooting” to judge the situation
thoroughly and disassemble the pump only as necessary.
- Keep your hand away from the three studs connecting the air motor and lower pump. Fingers can get
caught in the reciprocating plunger.
In case of transferring high-temperature material, surface of pump and piping may be hot as well. It
may cause of burn. Please do not touch them.
- In case of emergency or abnormality, close emergency stop valve.
- Please do not operate pump when supplying solvent to the solvent cup and retightening gland packing.
- In case of following condition, please do not put your face in the material discharge port. There is a risk
of splashing liquid with compressed air
- When removing air from lower pump.
- Right after replacing material container.
- Use this product for the material suitable for the specification. Parts may be corroded and material leak
from the damaged parts can lead to environmental pollution. Also, follow handling notes (SDS) of the
manufacturer about the handling of the material used.
- Take fall-prevention measures if using a slim or light tank. Risk of falling will be increased due to shift in
center of gravity caused by change in the material level in a tank.
When using a bung adapter, to prevent the pump from falling over, hang the pump with a crane etc or
fix container firmly.
- (DR type only) Material remaining inside or on the surface of the pump may spill out by inserting or
removing the pump into from a drum. Be very careful not to get your clothing dirty.
- Shut off air source after work and nighttime, holidays, or when the pump is not in use for a while. Also,
open the valve at the discharge port to release residual pressure in the pump and hoses. Failure to do
so may result in damage to the hoses or facility pollution due to leak from the valve. The use has a
responsibility for such secondary accidents.
4.1 Operation switch and valve
- Pump Air Regulator (sold separately)
Function : Controlling air pressure for pump operation.
To operate : Clockwise turn will increase pressure. Counterclockwise turn will decrease pressure.
(It can be locked by pushing the knob in.)
Note : The maximum allowable operating pressure of the pump is 0.7MPa. DO not exceed this limit.
Remark : Discharge pressure can be calculated by multiplying the air pressure by the pump ratio.
- Air Valve, Pump (sold separately)
Function : Starting/Stopping the pump.
To operate : When the lever is parallel to the pipe, the valve is open. If the lever is perpendicular to the pipe,
the valve is closed.
In case of emergency, close this valve.
4.2 Solvent cup
(This procedure is not necessary if lower pump has a soak in drum, such as using with drum cover)
1) The pump is equipped with a solvent cup to keep the packing from sticking to the plunger. Shut down the pump
and then fill the cup 2/3 full with suitable lubricant or solvent.
2) When lubricant in the cup runs out during operation, shut down the pump first and refill the cup.

8
4.3 Filling delivery piping with material
1) Open valve for material discharge.
2) Open the air valve for the pump and increase air pressure gradually with the pump air regulator. The pump will
start operating at approx. 0.05MPa. Adjust the pump air regulator to set pump speed to 5-8 seconds per cycle.
3) Air-containing material will be discharged from the material discharge port. Put a plastic bag over the port to
receive discharged material. Keep the pump operating until the air inside material is released completely. Then
close the material discharge valve by securely tightening it.
4) After filling delivery piping with material, close the air valve for the pump and set the pump air regulator to 0MPa.
4.4 Operation
1) Adjust the pump air regulator to set to the desirable operating pressure. An estimate of the material discharge
pressure to the supply air pressure is calculated by “supply air pressure × pump ratio”.
(e.g. When operating a 13:1 ratio pump at 0.7MPa supply air pressure, material will be discharged at approx.
9.1MPa.)
2) Open discharge valve and the pump will automatically start to operate and discharge the material. When the
valve is closed, the pump is automatically stopped.
NOTE
Material viscosity varies with changes in temperature. It is recommended to make a note of appropriate pressure
for each season.
4.5 Retightening gland packing (“-V” series)
Because of the deformation or wear of gland packing, solvent cup of “-V” series loose the tightness. In order to
protect plunger and packing, and to prevent leak, please tighten it on a regular basis. Please do it when the
pump is stopped.
NOTE
After retightening, verify that the pump runs at 0.05MPa without leakage from the gland part.
.
4.6 When container is empty (changing drum)
1) When the container such as drum is empty, the pump continued to operate without stop automatically. Please
close the air valve as soon as possible. Then please set air regulator to 0MPa.
2) <Used with drum cover>
Lift up the pump and drum cover by crane and replace to new container such as drum.
<Used with bung adapter>
Loosen wing bolt of the bung adapter. Lift up the pump by crane and remove from drum. When new drum is
ready, follow “3.3 Installation of Drum Pump (Using a bung adapter: DR-125B13)”.
<Siphon pump used with suction tube>
Remove the suction tube from container, and set to new container.
3) When changing container, air will contaminate in the pump. Be careful of air-containing material discharged
from the material discharge port when restart the pump.
To remove air, please follow chapter 3) of “4.3 Filling delivery piping with material”.
4.7 After work
1) Close the air valve for the pump and set the pump air regulator to 0MPa.
2) Open the valve on the discharge port to release residual pressure on air and material inside the pump and
piping.

9
5. Maintenance and Inspection
CAUTION
- Keep your face away from the exhaust and discharge ports. Material may suddenly come out. There is
a possibility of losing eyesight if it strikes eyes.
- Keep your fingers away from each port to avoid injury from moving parts.
- Modification of this pump may lead to death, bodily injury, or a failure. Do not modify it in any case
because it involves a risk.
- Gasoline is a high volatile fuel. Do not use it to clean the pump in any case, otherwise ignition or
explosion may be caused.
- Do not discharge material directly onto the ground. Dispose of harmful materials according to the
requirements specified in SDS or local regulations. Also, dispose of pump according to the local
regulations after removing residual material from inside pump. (Please contact industrial waste
disposal service.)
- Always wear proper safety equipments(facemask, ear plugs, and safety shoes, etc.) when installing,
operating, and disassembling the pump.
- Stop pump operation immediately when a drum becomes empty. Running the pump dry will cause
excessive. Be especially careful when pumping explosive material. Mixture of an air and vaporized
material can explode. If there is any possibility of running dry, install a dry-run protection device like a
liquid level control.e vibration, resulting in reduction of pump life and damage to other equipment.
- Execute the daily checkup.
- Before maintenance involving disassembly, be sure to shut off air supply to the pump and release
residual air pressure and material pressure in the tubes and pump. Failure to do so may result in
material gushing out.
- The life of consumables varies depending on operating conditions. Replace a degraded part with a new
one.
CAUTION
- When performing maintenance or inspection, notify workers by hanging a sign or other method to keep
them from touching the unit.
- If there is any danger or abnormality, discontinue pump operation and refer to Troubleshooting to solve
the problem.
- Be sure to shut off air supply to the pump before maintenance and inspection.
- When performing maintenance and inspection, please be careful of edge of pump. It may cause of
personal injury.

10
5.1 Maintenance and inspection
INTERVAL ACTION
Daily 1)Inspect operation of pump.
Weekly 2)Lubricate pump. (turbine oil, class#1, additive-free: ISO V 32)
Annually 3)Check for loose bolts and nuts.
Triennially 4)Overhaul pump.
1) Inspect operation of pump
Inspect pump to ensure the following:
- The pump operates normally and smoothly,
- There is no air/material leak in each part of the pump or air/material piping,
- There is no abnormal noise during pump operation, and
- There is no abrasion or deterioration apparently in each part of the pump.
2) Lubricate pump
Lubricate pump according to the following procedure:
- Close the air valve for the pump and set the pump air regulator knob to 0MPa.
(Without a lubricator)
- Disconnect the air piping from the air inlet of the pump and apply a few drops (approx. 0.5mL) of lubricant
directly to the pump.
(With a lubricator)
- Check the amount of oil remaining in the lubricator and fill it with lubricant if needed.
3) Check for loose bolts and nuts
Check bolts and nuts according to the following procedures:
- Completely shut down the pump and lift by disconnecting from the air source, for example.
- Ensure that all visible bolts and nuts on the pump and lift cannot be loosened by hand.
4) Overhaul pump
Pump needs to be overhauled triennially. Please contact the retail store where you purchased your pump or our
business office for overhaul. Earlier overhaul is recommended depending on use frequency and deterioration
degree.

11
PROBLEM POSSIBLE CAUSE REMEDY
Compressor is off. Turn on compressor.
Valve on air piping is closed. Open valve.
Air pressure setting is under 0.2MPa. Set air pressure to 0.2MPa or above.
Valve on material outlet is closed. Open valve.
Frost occurs inside silencer. Use dryair.
O ring on sliding part of air piston is worn out.
(Air leak occurs from silencer.)
Block (773210) and ball (686271) in valve body (804815) are
worn out.
Any parts (e.g. spring, pin) used in switching system in valve
body (804815) or air motor (804814 / 804856) are damaged.
Air leak from air
motor
- Fasteners are loose.
- O rings and packings are worn out.
- Retighten loose parts.
- Replace worn part.
Air leak from
silencer during
shutdown
- Foreign object is caught between block (773210) and
valve seat (716246) in valve body (804815).
- Seating part is worn out.
- Remove foreign object.
- Replace worn part.
Pump doesn’t run
and air leaks from
silencer
- Foreign object is caught between spindle (716299) and
valve switcher (832996) in air motor (804814 / 804856).
- There exists damage that prevents sliding movement of
parts below.
- Remove foreign object.
- Replace damaged part.
Pump doesn’t draw
material at first time
of operation
Pump operating speed is so fast that lower pump suction
cannot keep up with pump movement. (Valve inside lower pump
is not working well.)
Set pump speed to 5-8 sec. per cycle
until material is pumped out.
If upward movement of plunger is faster,
- seat surface of piston valve is defective (wear of seat
surface, inclusion of foreign material) or,
- packings are damaged.
If downward movement of plunger is faster,
- seat surface of foot valve is defective (wear of seat
surface, inclusion of foreign material),
- packings are damaged, or
- shovel rod is bent.
If downward movement of plunger is faster, operating speed is
so fast that lower
pump suction cannot keep up with pump movement. (Vacuum
is caused inside lower pump.)
Decrease air pressure until material
comes out. (This pressure is the upper
limit of normal operating pressure.)
Connecting rod connecting air motor and lower pump is
completely s eparated from air m otor. (In this cas e, parts inside
of lower pump may be damaged.)
Ins pect ins ide lower pump firs t, then
replace damaged part, and retighten
each part.
Leak occurs in delivery pipe.
Leak occurs in lower pump (connections are loosened or o ring,
backup ring, or packing is damaged).
Material leak from
lower pump
- Fasteners are loose.
- O ring, backup ring or packing is damaged.
- Retighten loosened parts.
- Replace damaged part.
Material contains
air bubbles even
after bleeding
- Fasteners are loosened.
- O ring or backup ring is damaged.
- Retighten loosened parts.
- Replace damaged part.
- Retighten loose parts.
- Replace damaged part.
Pump doesn’t stop
- Remove foreign object.
- Replace damaged part.
Pump doesn’t run
Replace worn out or damaged part.
Material cannot be
pumped out
5.2 Troubleshooting
If you suspect that you have a problem with your product, consult the table below for some common problems and
their solutions. Contact the retail store where you purchased your product or our business office if all else fails.

12
Description Q'ty Times of replacement
<804855> <804856>
O ring 1 per unit 5 million cycles
O ring 1 per unit 5 million cycles
O ring 1 per unit 5 million cycles
Tube 1 per unit 6 years
Valve seat 1 per unit 10 million cycles
Block 1 per unit 10 million cycles
Spring 1 per unit 10 million cycles
Ball 1 per unit 10 million cycles
Valve Body As s e m bly
Part No.
Air motor assembly
640033
640072
570145
<804815>
640034
686271
716246
773210
706612
854592 854598 854594 854600
（SH-125B3.5) (SH-125B3.5-V) (SH-125B5) (SH-125B5-V)
854593 854599 854595 854601
(DR-125B3.5) (DR-125B3.5-V) (DR-125B5) (DR-125B5-V)
<804857> <804861> <804858> <804862>
Plunger 1 per unit 10 million cycles
686390 686391 Packing 1 per unit 5 million cycles
770492 770207 V Packing 3 per unit 3 million cycles
Cylinder 1 per unit 10 million cycles
Ball 1 per unit 6 million cycles
Valve Seat 1 per unit 6 million cycles
Packing 2 per unit 3 million cycles
Ball 1 per unit 6 million cycles
Foot Valve 1 per unit 6 million cycles
854596 854602 854597 854603
(SH-125B13) (SH-125B13-V) (DR-125B13) (DR-125B13-V)
<804859> <804863> <804860> <804864>
Plunger 1 per unit 10 million cycles
685795 685795 Packing 1 per unit 5 million cycles
770062 770062 V Packing 6 per unit 3 million cycles
Suction Tube 1 per unit 10 million cycles
Cylinder 1 per unit 10 million cycles
Ball 1 per unit 6 million cycles
Valve Seat 1 per unit 6 million cycles
Revolving 1 per unit 3 million cycles
Packing 2 per unit 3 million cycles
Ball 1 per unit 6 million cycles
Foot Valve 1 per unit 6 million cycles
Lower Pump Assembly
716425 716427
Description Q'ty Tim es of
replacement
704583
Part No.(Type)
701382 701369
833004
630479
701360
770493 770208
630487
704580
704586 704587
630334
701553
770233
770151
630341
Part No.(Type)
Lower Pump Assembly
716480
Description Q'ty Tim es of
replacement
5.3 Consumables
Refer to chart under for replacement time for consumables used in the pump. The replacement time should be used
only as a guide. Consumption varies depending on use conditions. Also, be sure to replace a part when you find any
defect like a leak during operation.
■ Air Motor Assembly
■ Lower Pump Assembly

13
5.4 Design standard use period
Design standard use period is established for the product. (See the table below.)
Use of the product beyond this period may result in personal injury or property damage.
①SH-125B3.5, DR-125B3.5, SH-125B3.5-V, DR-125B3.5-V ·················· 10years
②SH-125B5, DR-125B5, SH-125B5-V, DR-125B5-V ···························· 10 years
③SH-125B13, DR-125B13, SH-125B13-V, DR-125B13-V ····················· 10 years
6. Parts Disassembly Drawing and Parts List
■Pump assembly
SH-125B3.5(854592), SH-125B5(854594), SH-125B3.5-V(854598), SH-125B5-V(854600)
854592 854594 854598 854600
1 804855 Air motor assembly 1
4 632059 Slit pin 1
5 716409 Bushing 1
6 700350 Cap nut 1
7 716410 Stud 3
8 631918 Wave spring washer 3
9 627045 Nut 3
10 804857 804858 804861 804862 Nut 1
14 804697 Silencer 1
No. Description Q'ty
Part No.
Standard
Conditions of Use ①SH/DR-125B3.5□②SH/DR-125B5□③SH/DR-125B13□
Application
Season
Temperature
Material being
pumped
Hydraulic oil
ISO VG220 20℃
Container
Suppl
y
air pressure
Discharge Volume
per C
y
cle 619 mL / cycle 458 mL / cycle 171 mL / cycle
Daily Amount of
Material being
pumped
(
Dischar
g
e volume
)
2000L 1600L 600L
Operating Days per
y
ear
0.5 MPa
260 days (5 days a week)
Pumping grease
Spring and Fall
20℃
Open Head Drum (200L): JIS Z 1601 class 1
Hydraulic oil
ISO VG32 20℃

14
■Pump assembly
DR-125B3.5(854593), DR-125B5(854595), DR-125B3.5-V(854599), DR-125B5-V(854601)
■Pump assembly
SH-125B13(854596), DR-125B13(854597), SH-125B13-V(854602), DR-125B13-V(854603)
854593 854595 854599 854601
1 804855 Air motor assembly 1
4 632059 Slit pin 3
5 716409 Bushing 1
6 700350 Cap nut 1
7 716411 Stud 3
8 631918 Wave spring washer 3
9 627045 Nut 3
10 804857 804858 804861 804862 Lower pump assembly 1
12 716288 Joint 1
13 716412 Connecting rod 1
14 804697 Silencer 1
No. Part No. Description Q'ty
854596 854597 854602 854603
1 804856 Air motor assembly 1
4 632059 Slit pin 1
5 716409 Bushing 1
6 700350 Cap nut 1
7 716410 Stud 3
8 631918 Wave spring washer 3
9 627045 Nut 3
10 804859 804860 804863 804864 Lower pump assembly 1
14 804697 Silencer 1
No. Part No. Description Q'ty