Troubleshooting
10
3A8569A
The unit pumps, but the output
flow is low.
The inlet suction screen is clogged (used
oil).
Remove the inlet suction screen
using a 3/4 in. (19 mm) hex wrench.
Clean or replace the inlet suction
screen.
There is an air leak in the suction tube.
Inspect all joints in the suction tube
making sure that they are sealed.
The suction tube is too close to the drum
bottom.
The suction tube must have a 1 in.
(25.4 mm) minimum clearance.
The drum is empty.
Refill or replace the drum.
The drum is not vented.
Vent the drum to atmosphere.
The gears are worn or damaged.
Remove the cover and inspect the
gears. If damaged, replace the pump
housing assembly.
The motor does not run at the proper
speed.
Check the electrical connection and
verify the supply voltage.
The suction tube, hose, or nozzle is
clogged.
Inspect and clean the suction tube,
hose, or nozzle, and replace as
needed.
The motor stalls when the
nozzle is closed.
The bypass relief valve is stuck.
Remove and inspect the pressure
relief valve. Clean, or replace if it is
damaged.
The supply voltage is low.
Check the supply voltage.
The gears are damaged and binding.
Inspect the gears. If they do not turn
freely, or are damaged, replace the
pump housing assembly.
The motor is faulty.
Replace with a new pump.
The motor overheats.
The gears are binding.
Inspect the gears. If they do not turn
freely, or are damaged, replace the
pump housing assembly.
The nozzle was closed for an extended
time during pump operation.
Do not exceed five (5) minutes of
operation with the nozzle closed.
The inlet suction screen is clogged.
Remove the inlet suction screen
using a 3/4 in. (19 mm) hex wrench.
Clean or replace the inlet suction
screen.
The suction tube, hose, or nozzle is
clogged.
Inspect and clean the suction tube,
hose, or nozzle.
Operating the pump for more than 30
minutes of continuous duty.
Limit operation to 30 minutes per
hour.
Problem
Cause
Solution