Troubleshooting - Stanley TP08 User Manual

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the tool, always make sure the hydraulic power source is supplying the
correct hydraulic flow and pressure as listed in the table. Use a flowmeter know to be accurate. Check the flow with
the hydraulic fluid temperature at least 80 °F/27 °C.
PROBLEM
Pump will not start.
Poor pump performance.
Hydraulic fluid in discharge
flow.

TROUBLESHOOTING

CAUSE
No hydraulic fluid flow or
pressure.
Defective couplers.
Impeller jammed with debris.
Impeller rubbing against wear
plates.
Defective power module.
Hydraulic flow reversed.
Improper hydraulic fluid flow.
Trash pump submersed in
sediment.
Trash pump inlet restricted.
Discharge hose kinked or
restricted.
Discharge hose too small.
Water lift too high.
Impeller worn or damaged.
Wear plates worn or damaged.
Motor shaft seal failure.
SOLUTION
Turn on power unit and check that 7–10
GPM/26-38 LPM at 2000 psi/140 bar is
available at the trash pump.
Check the couplers by connecting them
together with the hydraulic power supply
operating and with the control valve in the "ON"
position. The power supply should operate
without "loading" from the couplers.
Clean the pumping chamber.
Check and adjust the impeller clearance.
Repair or replace the power module.
Check that the hoses are correctly connected
to the pump motor ports. The female coupler
should be connected to the "IN" port. The return
fluid must never flow through a reversing valve.
Check that 7–10 GPM/26–38 LPM at 2000
psi/140 bar is available at the trash pump.
A 20% decrease in flow can result in a 50%
decrease in pump performance. 8 GPM/30 LPM
is the optimum circuit flow.
Lift the pump from the bottom of the hole or
chamber. Use a flat support under the pump if
necessary.
Remove restriction and clean thoroughly.
Straighten the hoes. If the hose must bend at
the top of the hole, use a piece of split rigid
conduit with large diameter of the expanded
hose. This keeps the hose from kinking. Use a
90° 4-inch pipe elbow on the trash pump outlet
if necessary.
Use a 4-inch diameter fire hose.
Lower the outlet end of the discharge hose.
Check impeller for damage and excessive wear.
Replace if necessary.
Check wear plates for damage and excessive
wear. Replace if necessary.
Replace the motor shaft seal. Ensure power
unit is delivering 7-10 GPM/26-38 LPM
TP08 User Manual ◄ 13