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Troubleshooting
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10 © SprayTECH. All rights reserved.
Problem
The unit will not run.
The unit will not prime.
The unit will not build or
maintain pressure.
Fluid leakage at the upper end
of the fluid section.
Poor spray pattern.
The unit lacks power.
Blown fuses at the pump.
Cause
1. Blown panel fuse or tripped breaker.
2. The unit is not plugged in.
3. The pressure control knob is set too
low.
4. Faulty or loose wiring.
5. Worn motor brushes.
6. Faulty on/off switch fuse.
1. The piston packings are dried out.
2. The pump inlet screen is plugged.
3. There is air in the pump or hose.
4. The packings are worn.
5. The fluid is too viscous.
6. The suction tube is clogged.
7. The suction tube has an air leak.
1. The pressure adjusting knob is not
properly set.
2. The pump intake screen is dirty.
3. The PRIME/SPRAY valve balls or seals
are worn or dirty.
4. There is air in the pump or hose.
5. The packings are worn.
6. The spray tip is worn.
7. There is internal leakage.
8. There is a fluid leak.
9. The fluid is too viscous.
10. The spray tip is too large.
1. The upper packings are worn.
2. The piston rod is worn.
1. The spray tip is too large for the
material being used.
2. The pressure adjustment is wrong.
3. Insufficient fluid delivery.
4. The fluid is too viscous.
1. The pressure adjustment is too low.
2. Improper voltage supply.
1. There is excessive pressure.
2. A circuit breaker has tripped.
3. The gear box, linkage, or motor has
failed.
Solution
1. Check and replace or reset.
2. Plug the unit in.
3. Turn the knob clockwise to increase the
pressure.
4. Inspect and take to a SprayTECH authorized
service center.
5. Take to a SprayTECH authorized service
center.
6. Take to a SprayTECH authorized service
center.
1. Remove the suction tube and feel the lower
ball check to be sure it is free to move off its
seat. Place a full cup of paint thinner over the
end of the fluid section and turn the pump on.
2. Remove the screen and clean.
3. Trigger the gun and run the unit for about 10
seconds until air is purged.
4. Replace the packings.
5. Prime the pump with a solvent appropriate to
the material being used. Carefully remove the
pump from the solvent container and immerse
the suction tube in heavy material to be
sprayed. With the nozzle tip removed, trigger
the gun until the heavy material appears at the
gun. Replace the nozzle tip.
6. Remove the suction tube and clean.
7. Check the connection and seal.
1. Turn the pressure control knob clockwise to
increase the pressure.
2. Remove and clean the intake screen.
3. Replace or clean.
4. Trigger the gun and run the unit for about 10
seconds until the air is purged.
5. Replace the packings.
6. Replace the spray tip following the instructions
that came with your gun.
7. With the gun trigger closed, allow the unit to
pump up to pressure and shut off. If the pump
momentarily starts, internal leakage is
indicated and fluid section repacking or valve
replacement is necessary.
8. Check for external leaks including hydraulic
fittings attached to the pressure control
housing.
9. Consult the manufacturer's recommendations
on the material container.
10. Replace the spray tip following the instructions
that came with your gun.
1. Relieve the pressure or replace the packings.
2. Replace the piston rod.
1. Change to a smaller tip.
2. Adjust the pressure control knob.
3. Clean all screens and filters.
4. Add solvent according to the manufacturer's
recommendations.
1. Increase the pressure.
2. Reconnect the input voltage for 120V AC.
1. Take to a SprayTECH authorized service
center.
2. Take to a SprayTECH authorized service
center.
3. Repair or replace the malfunctioning parts.