Troubleshooting
3A8570B
13
Troubleshooting
1. Follow
before checking or repairing the equipment.
2. Check all possible problems and causes before
disassembling the equipment.
Problem
Cause
Solution
Motor is running, but the pump
will not prime.
The pump lost the prime.
There is dirt under the pressure relief valve.
Remove the pressure relief valve and
inspect. Clean or replace the pump housing
assembly.
The gears are worn or damaged.
Remove the pump body and inspect the
gears. If damaged, replace the pump
housing assembly.
The oil level is low.
Refill or replace the tank.
There is an air leak in the suction tube.
Inspect all joints in the suction tube making
sure that all threaded joints have sealant
applied properly.
There is an air lock in the system.
Fill the system with fluid by keeping nozzle
open by operating the pump.
The motor does not run at the proper speed. Check the electric connections.
Ensure the supply voltage is at the proper
level.
Oil is leaking in the motor
mount.
A faulty or damaged motor shaft seal.
Replace the pump housing assembly.
Pressure switch is not activating.
Pressure relief is relieving pressure internally
for more than five (5) minutes.
Pressure switch is faulty.
Replace the pump outlet assembly with new
pressure switch.
Dirt is under the pressure relief valve.
Remove the pressure relief valve and
inspect. Clean or replace the pump housing
assembly.
A worn motor shaft.
Replace with a new pump.
