MAPLE Pumps Troubleshooting
- Symptom1 - Pump will not ‘Prime’.
- Symptom2 - Pump will not run.
- Symptom3 - Pump runs but has excessive pulsation.
- Symptom4 - Paint leaking into detection hose.
- Symptom5 - Air bleeding from vent plug.
Symptom1 - Pump will not ‘Prime’.
Possible Cause
- Air getting into the suction hose/manifold.
- Worn piston seal.
- Ball checks not seating correctly.
Remedy
- Check seals and hose connections.
- Replace piston seals.
- Inspect, clean and/or replace balls and seats.
- No Air or Fluid supply.
- Air piston seal worn.
- Pilot valve assemblies inoperable.
- Pilot valve assemblies inoperable.
- QE diaphragm defective.
- Ball checks not seating correctly.
- Check air and fluid supply ball valves and supply hoses.
- Replace piston seals.
- Switch/interchange pilot valves to isolate faulty pilot valve and clean/replace.
- Check clean/replace Air valve.
- Check for constant exhaust air when pump is not running. Check/replace QE diaphragms.
- Inspect, clean and/or replace balls and seats.
- Air getting into fluid line, air supply restricted.
- Obstructed fluid ball checks.
- Worn air motor piston seals.
- Worn/failed air motor shaft seals.
- Worn fluid piston seal.
- Air exhaust restricted.
- Check seals and hose connections. Check air supply.
- Remove, clean, and inspect seat, ball, and ball cage. Replace if suspect or worn.
- Replace air motor piston seal.
- Disassemble pump as required to replace air motor shaft seals.
- Replace fluid piston seal.
- Check QE diaphragms and exhaust outlets.
Symptom2 - Pump will not run.
Possible Cause
Remedy
Symptom3 - Pump runs but has excessive pulsation.
Possible Cause
Remedy
Symptom4 - Paint leaking into detection hose.
Possible Cause
Bellows seal failure.
Remedy
Replace bellows seal.
Symptom5 - Air bleeding from vent plug.
Possible Cause
Air motor shaft seal leaking.
Remedy
Check air motor shaft seal replace as necessary.
