Anest Iwata MSU-111N User manual

Instruction Manual
Multi-Spray Unit
Air-Assisted Airless Spray Unit
MSU-111N (13:1 Stand Mount)
MSU-113N (13:1 Cart Mount)
MSU-114N (13:1 Wall Mount)
MSU-323N (17:1 Cart Mount)
MSU-324N (17:1 Wall Mount)
This instruction manual contains IMPORTANT WARNINGS, CAUTIONS and INSTRUCTIONS.
Read and understand this instruction manual before use and retain for reference.

ŰImportant Information – Safety Precautions
-Equipment in this instruction manual is exclusively for coating purposes. Do not use for other purposes.
-Read and understand this instruction manual. The operator shall fully understand the requirements stated
within the instruction manual including important warnings, cautions, operation and correct handling.
-Incorrect operation or mishandling can cause serious bodily injury, death, fire or explosion.
Safety precautions
-The safety precautions in this instruction manual describe the minimum necessary information. Be sure to
follow national and local regulations on fire prevention, electricity and safety as well as your own corporate
regulations.
-Pay special attention to sections shown with the symbols below. The explanations of the symbols are as
follows:
Warning and caution
WARNING This symbol indicates that a potentially hazardous situation may result in serious
injury or death if not followed.
CAUTION This symbol indicates that a potentially hazardous situation may result in minor or
moderate injury or damage to equipment if not followed.
Types of symbols
This symbol indicates you must use caution.
Explanation will be given near symbol.
This symbol indicates warning may cause physical harm.
Explanation will be given near symbol.
This symbol indicates recommendations or requirements.
Explanation will be given near symbol.
Notes
IMPORTANT This symbol indicates important information needed to achieve full performance and
function of the equipment.
HINT This symbol indicates useful knowledge and advice.
ANEST IWATA shall not to be responsibility for any injury or damage caused by the disregard of warnings,
cautions or the instructions contained in this instruction manual.

- 1 -
ŰContents
Important Information - Safety Precautions
1. Safety Warnings…..…………………………... 2
2. Specifications……….…………………………. 4
3. Functions….……………………………………. 8
4. Setup.……………………………………………. 10
5. Operation.………………………………………. 12
6. Cleaning.………………………………………... 14
7. Maintenance.…………………………………… 15
8. Trouble Shooting.……………………………... 16
9. Disassembly and Assembly.………………… 18
10. Parts List.……………………………………….. 27
11. Spray Gun Nozzle Tip Chart..……………….. 35

- 2 -
Ű1. Safety Warnings
WARNING
FIRE OR EXPLOSION HAZARD
1. Fluid and/or solvent can be highly flammable or combustible.
-Use in well-ventilated spray booth.
-Avoid any ignition sources such as smoking, open flames or electrical hazard.
2. To reduce the risk of static sparking, grounding continuity to the spray equipment, fluid
container and object being sprayed must be maintained.
HAZARD CREATED WHILE COATING MATERIALS ARE ATOMIZED AND SPRAYED
1. Toxic vapors produced by spraying certain materials can cause intoxication and
serious damage to health.
-Use in well-ventilated areas.
-Always wear protective clothing, eyewear, gloves and respirator to prevent toxic
vapor, solvent and paint from coming into contact with your eyes and skin.
PRESSURIZED FLUID HAZARD - INJECTION HAZARD
1. Pressurized hazardous fluid can cause serious injury or death.
-Always wear protective clothing, eyewear, gloves and respirator.
-Never spray toward a person or animals and never pull the trigger of the spray
gun near the body.
-Never stop or deflect a fluid leak from the spray equipment or fluid hose with your
hand. Be sure to stop the spray equipment according to the correct procedures.
2. Replace hoses immediately, if cracked, damaged, bent, crushed, distorted or worn.
Use of such hoses can cause damage.
3. Never bend hoses with a radius of less than 2in. (50mm) or put heavy items on top of
hoses.
4. Keep hoses away from sharp edge and moving parts.
5. Be sure to tighten all connections.
MISUSE HAZARD
1. Never touch moving parts.
2. Always release air and fluid pressure when not in use.
3. Always release air and fluid pressure before cleaning, disassembly or service. For
emergency stop and to prevent unintended operation, a shut off valve is installed on
this unit to stop the air supply.
4. Be sure to use the spray equipment at less than the maximum working pressure. If not,
it can cause spray equipment failure, malfunction, serious injury or death.
5. Never modify this unit for any other applications.
6. Never use this unit to spray or supply food products.
7. If operation appears incorrect, immediately stop operation and find the cause.
8. Never use until the problem has been solved.
9. Pay attention to avoid hitting or dropping this unit, especially threaded and seated
parts.
10. Never use damaged parts.
11. Repair or replace worn or damaged parts immediately. Always use ANEST IWATA
replacement parts.
12. Never operate this unit or disassemble without receiving proper education and training.
13. Wear hearing protection.
OTHER HAZARD
1. Be sure to follow fire prevention, electrical and other local regulations.

- 3 -
Ű1. Safety Warnings
CAUTION
1. Never use the following homogenate hydrocarbon solvents.
-Methyl chloride
-Dichloromethane
-1.2 - dichloromethane
-Carbon tetrachloride
-Trichloethylene
-1.1.1 - trichloroethane
2. Be sure to use compatible fluids with the wetted parts of this unit and the spray gun, hoses and fittings.
Make sure to review the Material Safety Data Sheet (MSDS) from paint or fluid manufacturer.
IMPORTANT
1. Check to ensure that this unit has not been damaged during transportation.
2. Install this unit in a dry, clean and well-ventilated area.
3. Use clean air filtered through a dryer and a filter finer than 50 microns. If not, it can cause spray equipment
malfunction and finish problem.
4. Be sure to follow local guidelines for proper fluid storage procedures.
5. Be sure to follow local guidelines for proper cleaning and fluid disposal procedures.

- 4 -
Ű2. Specifications
2-1. Specifications
2-1-1. 13:1 pump unit
Model MSU-111N MSU-113N MSU-114N
Type Stand Mount Cart Mount Wall Mount
Dimentions (L x W x H) inch 21.0 x 20.9 x 40.3 19.7 x 20.9 x 40.3 13.0 x 10.9 x 24.6
mm 533 x 530 x 1023 500 x 530 x 1023 330 x 277 x 626
Weight lbs 35.3 39.7 28.7
(without hoses and gun) kg 16 18 13
Plunger Pump Model PP-7131N (Stainless Steel Model)
Pressure Ratio 13:1
Air Inlet BSPP1/4” (G1/4”)
Air Outlet (to spray gun) BSPP1/4” (G1/4”)
Fluid Inlet BSPP1/2” (G1/2”)
Fluid Outlet BSPP1/4” (G1/4”)
Maximum Inlet Air Pressure 98psi (0.68MPa, 6.8bar)
Maximum Fluid Working Pressure 1274psi (8.8MPa, 88bar)
Maximum Fluid Output 0.50gal/min (1.9L/min)
Maximum Cycle 110cycles/min
Maximum Fluid Output per Cycle 0.58oz/cycle (17.3mL/cycle)
Fluid Filter Set (Option) 100mesh
Suction Filter 50mesh (Optional 100mesh)
Maximum Fluid Viscosity 300cps (100sec/NK-2, 85sec/Ford#4, 24sec/Zahn#4)
Wetted Parts Stainless Steel, G2, HDPE
Operating Ambient Temperature 41 - 104°F (5 - 40°C)
Operating Air/Fluid Tempture 41 - 109°F (5 - 43°C)
Noise Level 81.6dB(A)
Measuring point : 1 m backwards from pomp, 1.6 m height
Required compressor (for pump) 1.0 - 3.0hp
*See spray gun instruction manual about specifications of spray gun.

- 5 -
Ű2. Specifications
2-1-2. 17:1 pump unit
Model MSU-323N MSU-324N
Type Cart Mount
Wall Mount
Dimentions (L x W x H) inch 19.7 x 20.9 x 40.3 14.5 x 10.9 x 28.9
mm 500 x 530 x 1023 368 x 277 x 734
Weight lbs 48.5 37.5
(without hoses and gun) kg 22 17
Plunger Pump Model PP-1171CNE (Stainless Steel Model)
Pressure Ratio 17:1
Air Inlet BSPP1/4” (G1/4”)
Air Outlet (to spray gun) BSPP1/4” (G1/4”)
Fluid Inlet BSPP1/2” (G1/2”)
Fluid Outlet BSPP1/4” (G1/4”)
Maximum Inlet Air Pressure 98psi (0.68MPa, 6.8bar)
Maximum Fluid Working Pressure 1666psi (11.5MPa, 115bar)
Maximum Fluid Output 0.93gal/min (3.5L/min)
Maximum Cycle 92cycles/min
Maximum Fluid Output per Cycle 1.30oz/cycle (38.3mL/cycle)
Fluid Filter Set Model:TF-8N, 100mesh
Suction Filter 50mesh (Optional 100mesh)
Maximum Fluid Viscosity 300cps (100sec/NK-2, 85sec/Ford#4, 24sec/Zahn#4)
Wetted Parts Stainless Steel, G2, HDPE
Operating Ambient Temperture 41 - 104°F (5 - 40°C)
Operating Air/Fluid Tempture 41 - 109°F (5 - 43°C)
Noise Level 86.3dB(A)
Measuring point : 1 m backwards from pump, 1.6 m height
Required compressor (for pump) 1.0 - 5.0hp
*See spray gun instruction manual about specifications of spray gun.

- 6 -
Ű2. Specifications
2-2. Performance curve
PP-7131N (13:1 pump) PP-1171CNE (17:1 pump)
Inlet air pressure: The number with each curve
Test fluid: Water
How to find fluid pressure
1. Locate specific fluid output along the horizontal axis of the chart.
2. Follow vertical to the intersection with the fluid pressure curve of
selected inlet air pressure.
3. Follow left to the vertical axis of the chart to read fluid pressure.
How to find air consumption
1. Locate specific fluid out put along the horizontal axis of the chart.
2. Follow vertical to the intersection with the air consumption curve of
selected inlet air pressure.
3. Follow right to the vertical axis of the chart to read air consumption.
How to find cycle per minutes
1. Locate specific fluid output along the horizontal axis of the chart.
2. Follow vertical to the intersection with number of cycle curve of top chart.
Follow left to the vertical axis of the chart to read cycle per minutes.
Example: PP7131N (13:1 pump) See example to right Fig. A
When inlet air pressure is 71psi and fluid output is 0.3gal/min,
1. Fluid pressure is approx. 700psi
2. Air consumption is approx. 5.5cfm.
3. Cycle per minutes is approx. 60 cycles/min. Fig. A

- 7 -
Ű2. Specifications
2-3. Model plate
Ref Description
1 Model name
2 Model
3 Serial Number
CE-EX Marking
4
- Equipment group: II
- Category: Gas2G
- Area: Gas
- Maximum surface temperature: temperature class T6
- X marking
Any static electricity discharge from the spray gun is to be diverted to the
grounded the conductive air hose as stipulated.
5 Maximum air working pressure
6 Manufacturer

- 8 -
Ű3. Functions
3-1. 13:1 pump unit
D: EMERGENCY VALVE
EMERGENCY STOP
POSITION
OPERATING
POSITION
A
B
C
D
E
F
H
G
G: CIRCULATION VALVE
OPEN POSITION
CLOSE POSITION
AIR INLET
AIR OUTLET
FOR SPRAY GUN
FLUID OUTLET
Fig.1: Functions (13:1 pump unit)
Parts Function
A Plunger Pump PP-7131N, stainless steel model
B Pop-off Valve Working pressure: 116psi
C Air Regulator For pump operation. with locking knob feature
D Emergency Valve Emergency air shut off valve
E Suction Hose Set with 50mesh filter
F Air Filter Regulator For atomizing air wth locking knob feature
G Circulation Valve To circulate or dump fluid
H Circulation Tube To circulate or dump fluid
I Fluid Filter Set (Option) 100mesh
*Spray gun and fluid and air hoses are not included in this unit.

- 9 -
Ű3. Functions
3-2. 17:1 pump unit
D: EMERGENCY VALVE
EMERGENCY STOP
POSITION
OPERATING
POSITION
CLOSE POSITION
G: CIRCULATION VALVE
OPEN POSITION
A
B
C
D
E
F
G
H
I
AIR INLET
AIR OUTLET
FOR SPRAY GUN
FLUID OUTLET
Fig.2: Functions (17:1 pump unit)
Parts Function
A Plunger Pump PP-1171CNE, stainless steel model
B Pop-off Valve Working pressure: 116psi
C Air Regulator For pump operation. with locking knob feature
D Emergency Valve Emergency air shut off valve
E Suction Hose Set with 50mesh filter
F Air Filter Regulator For atomizing air. with locking knob feature
G Circulation Valve To circulate or dump fluid
H Circulation Tube To circulate or dump fluid
I Fluid Filter Set TF-8N, 100mesh
*Spray gun and fluid and air hoses are not included in this unit.

- 10 -
Ű4. Setup
4-1. Wall mount unit installation
CAUTION
1. Be careful not to drop this unit during installation.
2. Install this unit on stable wall able to support the weight of this unit, hoses, any accessories and material
inside the pump and stress created by pump operation.
Wall mount hole layout
Four 9mm (0.354in.) dia. holes
210mm (8.27in)
160mm (6.3in) 25mm (0.98in)
30mm (1.18in)
35mm (1.38in)
80mm (3.15in)
4-2. Setup
WARNING
1. This unit should be operated by adequately trained operators only.
2. To reduce the risk of static sparking, grounding continuity to the spray equipment, fluid container
and object being sprayed must be maintained.
3. Be sure to tighten all connections.
4. Be sure to follow fire prevention, electrical and other local regulations.
IMPORTANT
1. Install this unit in a dry, clean and well-ventilated area.
2. Use clean air filtered through a dryer and a filter finer than 50 microns. If not, it can cause spray equipment
malfunction and finish problem.
HINT
1. Grounded air hose designed by ANEST IWATA is available.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Place this unit on hard level surface and load uniformly, if stand or cart mount unit.
2. Secure ground wire.
3. Close Air Regulators (C and F) fully.
4. Set Emergency Valve (D) to “Emergency Stop” position and open Circulation Valve (G).
5. Connect fluid and air hoses to the outlet fittings of this unit and other end to inlet fittings on spray gun. If hoses
or fittings are damaged, replace immediately.
6. Connect air supply hose to inlet of unit.

- 11 -
Ű4. Setup
4-3. Checking operation
WARNING
1. Never touch moving parts.
IMPORTANT
1. Do not keep pump idling for extended periods of time. Prolonged idle operation may cause premature
pump failure.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Check Fluid Filter Set (I) if installed, suction filter installed on Suction Hose Set (E) and filter set installed on
spray gun. If they are clogged, clean or replace.
2. Close Air Regulators (C and F) fully.
3. Open Circulation Valve (G).
4. Set Emergency Valve (D) to “Operating” position.
5. Turn on the air supply to the unit.
6. Remove Suction Hose Set (E) from the pump fluid inlet and adjust Air Regulator (C) to 22 - 73psi (0.15 -
0.5MPa, 1.5 - 5bar) slowly.
7. After pump is running, cover fluid inlet fitting underneath the pump with your palm and feel for suction to make
sure that pump is working. If not, see 8. Trouble Shooting on page 16.
8. Set Emergency Valve (D) to “Emergency Stop” position to make sure that pump operation stops.
9. Close Air Regulators (C and F) fully.
10. Connect Suction Hose Set (E) and Circulation Tube (H). If they are clogged or damaged, clean or replace.

- 12 -
Ű5. Operation
WARNING
1. Use in well-ventilated spray booth.
2. Avoid any ignition sources such as smoking, open flames or electrical hazard.
3. Always wear protective clothing, eyewear, gloves and respirator.
4. Never spray toward a person or animals and never pull the trigger of the spray gun
near the body.
5. Never stop or deflect a fluid leak from the spray equipment or fluid hose with your
hand. Be sure to stop the spray equipment according to 5-4. Emergency stopping
procedure on page 13.
6. Never touch moving parts.
7. Always release air and fluid pressure when not the use.
8. Always release air and fluid pressure before cleaning, disassembly or service. For
emergency stop and to prevent unintended operation, a shut off valve is installed on
this unit to stop the air supply.
9. Be sure to use the spray equipment at less than the maximum working pressure. If not,
it can cause spray equipment failure, malfunction, serious injury or death.
10. Never modify this unit for any other applications.
11. Never use this unit to spray or supply food products.
12. If operation appears incorrect, immediately stop operation and find the cause. See 8.
Trouble Shooting on page 16.
13. Never use until the problem has been solved.
CAUTION
1. Be sure to use compatible fluid and cleaning fluid with the wetted parts of this unit.
5-1. Flushing
IMPORTANT
1. Flush fluid passages of this unit completely with cleaning fluid before first use and every time after use. If
not, it can cause finish problem and pump malfunction.
2. Always fully close or fully open circulation valve. Opening valve halfway can cause seat wear, fluid leakage
and lack of fluid pressure.
3. Be sure to follow local guidelines for proper cleaning and fluid disposal procedures.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Remove air cap set and nozzle tip from spray gun.
2. Close Air Regulators (C and F) fully.
3. Open Circulation Valve (G).
4. Set Emergency Valve (D) to “Operating” position.
5. Put Suction Hose Set (E) and Circulation Tube (H) into cleaning fluid container.
6. Adjust Air Regulator (C) to 22 - 73psi (0.15 - 0.5MPa, 1.5 - 5bar) slowly.
7. Circulate cleaning fluid or dump to another container through Circulation Tube (H).
8. Point the spray gun toward to container and pull the trigger of the spray gun. Be sure that compressed air is
not supplied to the spray gun before pulling the trigger.
9. Close Circulation Valve (G).
10. Circulate cleaning fluid or dump to another container through the spray gun.
11. After flushing, lift Suction Hose Set (E) from container and keep operating pump until air comes out of spray
gun.
12. Open Circulation Valve (G) and release the trigger of spray gun.
13. Keep operating until air comes out from Circulation Tube (H).
14. Close Air Regulators (C and F) fully.

- 13 -
Ű5. Operation
5-2. Preparing for spraying
IMPORTANT
1. Always fully close or fully open the circulation valve. Opening the valve halfway can cause seat wear, fluid
leakage and lack of fluid pressure.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Remove air cap set and nozzle tip from spray gun.
2. Close Air Regulators (C and F) fully.
3. Open Circulation Valve (G).
4. Set Emergency Valve (D) to “Operating” position.
5. Put Suction Hose Set (E) and Circulation Tube (H) into fluid container.
6. Adjust Air Regulator (C) to 22 - 73psi (0.15 - 0.5MPa, 1.5 - 5bar) slowly.
7. Circulate fluid through Circulation Tube (H) until fluid does not contain bubbles.
8. Point spray gun toward to container and pull trigger of spray gun. Be sure that compressed air is not supplied
to the spray gun before pulling the trigger.
9. Close Circulation Valve (G).
10. Circulate fluid through the spray gun until fluid does not contain bubbles.
11. Release the trigger of spray gun.
5-3. Spraying
IMPORTANT
1. See spray gun instruction manual for spray gun operation.
HINT
1. Half fill compatible solvent into wet cup to increase pump life.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Place specified nozzle tip on spray gun.
2. Adjust Air Regulators (C and F) to specified pressure.
3. Start spraying.
5-4. Emergency stop
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Set Emergency Valve (D) to “Emergency Stop” position and open Circulation Valve (G).
5-5. Stopping operation
HINT
1. Position plunger pump at the end of down stroke to increase pump life when not in use.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Close Air Regulators (C and G) fully.
2. Open Circulation Valve (G) slowly and pull the trigger of the spray gun. Make sure fluid and air pressure are
at “0”.

- 14 -
Ű6. Cleaning
WARNING
1. Use in well-ventilated spray booth.
2. Avoid any ignition sources such as smoking, open flames or electrical hazard.
3. Always wear protective clothing, eyewear, gloves and respirator.
4. Never spray toward a person or animals and never pull the trigger of the spray gun
near the body.
5. Never stop or deflect a fluid leak from the spray equipment or fluid hose with your
hand. Be sure to stop the spray equipment according to 5-4. Emergency stopping
procedure on page 13.
CAUTION
1. Be sure to use compatible cleaning fluid with the wetted parts of this unit.
IMPORTANT
1. Flush fluid passage of this unit completely with cleaning fluid every time after use. If not, it can cause finish
problem and pump malfunction.
2. Always fully close or fully open the circulation valve. Opening the valve halfway can cause seat wear, fluid
leakage and lack of fluid pressure.
3. Be sure to follow local guidelines for proper cleaning and fluid disposal procedures.
HINT
1. Position plunger pump at the end of down stroke to increase pump life when not in use.
Refer to Fig.1 on page 8 or Fig.2 on page 9 to find reference letters.
1. Remove nozzle tip from spray gun.
2. Clean fluid passage of pump and spray gun. Refer to 5-1. Flushing procedure on page 12.
3. Place nozzle tip to spray gun and spray cleaning fluid through nozzle tip to clean inside of nozzle tip.
4. Clean Fluid Filter Set (I, if installed), suction filter installed on Suction Hose Set (E) and filter set installed on
spray gun. Replace if necessary.

- 15 -
Ű7. Maintenance
7-1. Maintenance cycle
Daily 1. Clean fluid passage of pump and spray gun, fluid filters and nozzle
tip of spray gun.
2. Check for worn, damaged or broken parts.
3. Drain water from air filter regulator.
Every 50 hours 1. Clean fluid passage of pump and filters if fluid contains lots of
pigments and pump is run continuously.
Every 100 hours 1. Clean fluid passage of pump and filters, if pump is run continuously.
Every 300 hours 1. Tighten V-packing (upper) of plunger pump.
Every 500 hours 1. Put general-purpose grease on the moving parts of air motor.
Every 1,000 hours 1. Overhaul.
2. Replace parts with repair service kit. The parts included in the repair
service kit are shown in 10. Parts List on page 29 - 32.
3. Replace any other worn or damaged parts if necessary.
7-2. How to tighten V-packing (upper) of plunger pump
IMPORTANT
1. If wet cup is over tightened, it can cause the V-packing (upper) to wears early and the pump will not
operate.
1. Tighten wet cup by using included tool or a screwdriver every 300 hours and when fluid leaks through wet
cup.

- 16 -
Ű8. Trouble Shooting
Refer to Fig.1 on page 8 or Fig.2 on page 9 and 10. Parts List on page 29 - 35 to find reference letters and
numbers.
No. Problems Causes Solutions
Check air compressor and hoses.Air pressure is not supplied to the
unit. Check emergency valve.
Increase supplied air pressure.Pump operating air pressure is too
low. Increase air pressure at Air
Regulator (C).
V-packing (upper, 2-45/3-46 or
lower, 2-49/3-54) is over tightened.
Loosen Wet Cup (2-42/3-40) *1 or
Valve Holder Nut (2-47/3-50). *2
Parts of air motor are worn or
damage.
Replace parts. *2
Parts of air motor are not
assembled correctly.
Reassemble air motor. *2
Pump frozen (supplied air contains
too much moisture).
Eliminate air moisture by using a
dryer or water trap.
Exhaust hole of pump is blocked. Clean.
1 Pump does not operate.
Switch Block (2-17) is installed in
the incorrect direction.
Reassemble. *2
Increase supplied air pressure.Pump operating air pressure is too
low. Increase pump operating air
pressure at Air Regulator (C).
Fluid Filter (6-5/7-3), Suction
Filter (8-5) or spray gun filter is
clogged.
Clean or replace.
Suction Hose Set (E) is clogged. Clean or replace.
V-packing (upper, 2-45/3-46 or
lower, 2-49/3-54) is worn or
damaged,
Replace. *2
V-packing (upper, 2-45/3-46 or
lower, 2-49 / 3-54) is installed in the
incorrect direction.
Reassemble. *2
V-packing (upper, 2-45/3-46) is
over tightened or loose.
Loosen or tighten Wet Cup
(2-42/3-40). *1
V-packing (lower, 2-49/3-54) is
over tightened or loose.
Loose or tighten Valve Holder Nut
(2-47/3-50). *2
Pump frozen (supplied air contains
too much moisture).
Eliminate air moisture by using a
dryer or water trap.
Ball (upper, 2-51/3-55 or lower,
2-57/3-60) sticks on valve.
Clean. *2
Valve Holder Set (2-53/3-56) or
Valve Adaptor Set (2-58/3-61) is
worn or damaged or paint is built
up.
Replace or clean. *2
Fluid or air passage inside pump is
clogged.
Clean.
Nozzle tip or filter on spray gun is
clogged.
Clean or replace. See instruction
manual of spray gun.
Fluid contains air. See No.3 on next page.
2 Pump operation unstable.
Fluid output is low.
Fluid does not come out
during pump operation.
Air leaks from air motor of pump.
(Not exhausting air)
See No.6 on next page.

- 17 -
Ű8. Trouble Shooting
No. Problems Causes Remedies
Air has not been released. Refer to 5-2. Preparing spraying
procedure on page 13.
Suction Hose Set (E) or Valve
Adaptor Set (2-58/3-61) is loose.
Tighten.
Packing (lower, 2-56/3-59) is worn. Replace. *2
3 Paint contains air.
Fluid contains air by over agitating. Adjust agitator.
Fluid pressure is too low. Increase fluid pressure at Air
Regulator (C).
Fluid Filter (6-5/7-3), Suction
Filter (8-5) or spray gun filter is
clogged.
Clean or replace.
Valve Holder Set (2-53/3-56) or
Valve Adaptor Set (2-58/3-61) is
worn or damaged or paint is built
up.
Replace or clean. *2
V-packing (lower, 2-49/3-54) is
loose.
Tighten. *2
Exhaust hole of pump is blocked. Clean.
Nozzle tip is worn or orifice size is
too large.
Replace or choose smaller orifice
size. *3
4 Pulsation or variance within
spray pattern.
Fluid or air is leaking. Find leak and fix.
Fluid hose or joint is loose or
damaged.
Tighten or replace.Paint leaks from fluid hose or
joint.
Paint builds up on seat of fluid joint. Clean or replace.
Wet Cup (2-42/3-40) is loose. Tighten. *1Paint leaks from the Wet Cup
(2-42/3-40). V-packing (upper, 2-45/3-46) is
worn or damaged.
Replace. *2
Suction Tube (2-54/3-58) is loose. Tighten. *2Paint leaks from between
Suction Body (2-40/3-47)
and the Suction Tube
(2-54/3-58).
Packing (upper, 2-52/3-57) is worn
or damaged.
Replace. *2
Cylinder (6-2/7-1) is loose. Tighten.
5
Paint leaks from Fluid Filter
Set (I). Packing (6-6) or O-ring (7-5) is
worn or damaged.
Replace.
Air leaks from air hose or
joint.
Air hose or fitting is loose or
damaged.
Tighten or replace.
O-ring (2-16/2-20/3-5/3-26) is worn
or damaged.
Replace. *2
Packing (2-34/3-2) is worn or
damaged.
Replace. *2
6
Air leaks from air motor.
Pipe Nut (2-9) is loose or Sleeve
(2-10) is worn or damaged.
Tighten or replace.
*1 Refer to 7-2. How to tighten V-packing (upper) of plunger pump on page 15.
*2 Refer to 9. Disassembly and Assembly on page 18.
*3 Refer to 11. Nozzle Chart on page 35.

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Ű9. Disassembly and Assembly
WARNING
1. Always release air and fluid pressures before cleaning, disassembly or service.
2. Pay attention to avoid hitting or dropping this unit, especially threaded and seated parts.
3. Never use damaged parts.
4. Repair or replace worn or damaged parts immediately. Always use ANEST IWATA replacement parts.
5. Never modify this unit for any other applications.
6. Do not disassemble or assemble without receiving proper education and training.
9-1. Disassembly
9-1-1. Air motor section
IMPORTANT
1. Do not damage or bend air motor rod, changeover rod and rod and be sure to check that these are free of
foreign matter. It can cause pump malfunction.
a) PP-7131N (13:1 pump)
1. Loosen the four bolts and the pipe nut and remove
the seat block section from the air motor body.
2. Loosen the cap and remove the following parts.
-Spring
-Interlock end piece
-Packing
-Interlock piece
3. Loosen the air cylinder with a wrench and remove.
4. Remove the split pin.
5. Loosen the air motor rod and remove.
6. Loosen the rod guide and remove the air motor
rod section from the air motor body.
7. Loosen the cap nut and remove the following
parts.
-Piston washer
-Piston packing
-O-ring
8. Remove the rod guide from the air motor rod.