Troubleshooting - Graco 12 VDC EGP Instruction Manual

Troubleshooting

Problem
Motor is running, but the pump
will not prime.
Oil is leaking in the motor
mount.
3A8569A
Cause
There is dirt under the pressure relief
valve.
The gears are worn or damaged.
The oil level is low.
There is an air leak in the suction tube.
There is an air lock in the system.
The motor does not run at the proper
speed.
A faulty or damaged motor shaft seal.
The nozzle was closed for an extended
period of time during pump operation.
A worn motor shaft.
1. Follow Pressure Relief Procedure, page 7, before
checking or repairing the equipment.
2. Check all possible problems and causes before
disassembling the equipment.
Remove the pressure relief valve and
inspect. Clean or replace the pump
housing assembly.
Remove the cover and inspect the
gears. If damaged, replace the pump
housing assembly.
Refill or replace the drum.
Inspect all joints in the suction tube
making sure that all threaded joints
have sealant applied properly. Fill
pump outlet port with oil.
Fill the system with fluid by keeping
nozzle open by operating the pump.
Check the electric connections.
Ensure the supply voltage is at the
proper level.
Replace the pump housing assembly.
Do not exceed five (5) minutes of
operation with the nozzle closed.
Replace with a new pump.
Troubleshooting
Solution
9