PAGE 32 — QP3Ti TRASH PUMP • OPERATION AND PARTS MANUAL — REV. #1 (05/07/18)
TROUBLESHOOTING (PUMP)
Troubleshooting (Trash Pump)
Symptom
Pilot Lamp Status
Possible Problem
Solution
Pump does not take on water
(MANUAL mode).
Green lamp stays on, when
engine starts and red lamp
starts flashing, when pump
does not take on water in 5
minutes.
Not enough priming water in the
housing?
Add water.
Engine speed too low?
Increase throttle.
Strainer plugged?
Clean strainer.
Suction hose damaged?
Replace or repair hose, and clamps.
Air leak at suction port?
Check that fittings are tight and properly
sealed.
Pump is located too high above water
line?
Move pump closer to water.
Debris collecting in pump housing?
Clean pump housing.
Too much distance between impeller and
volute?
Adjust clearance by adding shims or
replace impeller. Min. .006 inch - Max.
.020 inch
Water leaking out weep hole between
pump and engine?
Check condition of mechanical seal and
gaskets, between pump end and engine
housing.
Pump does not take on water
(AUTO mode).
Green lamp stays on, when
engine starts and red lamp
starts flashing, when pump
does not take on water in 5
minutes.
Not enough priming water in the
housing?
Add water.
Strainer plugged?
Clean strainer.
Suction hose damaged?
Replace or repair hose, and clamps.
Air leak at suction port?
Check that fittings are tight and properly
sealed.
Pump is located too high above water
line?
Move pump closer to water.
Debris collecting in pump housing?
Clean pump housing.
Too much distance between impeller and
volute.
Adjust clearance by adding shims or
replace impeller. Min. .006" - Max. .020".
Water leaking out weep hole between
pump and engine?
Check condition of mechanical seal and
gaskets, between pump end and engine
housing.
Pump takes in water, little or
no discharge.
Green lamp stays on.
Engine speed too low
(MANUAL mode)?
Increase throttle speed
(MANUAL mode).
Suction strainer partially plugged?
Clean strainer.
Impeller/Volute worn?
Adjust clearance by adding shims or
replace impeller/volute.
Suction hose leaks at inlet.
Green lamp stays on.
Fittings/clamps are not sealed properly?
Tighten, replace or add clamp. (Keep
extra seals on pump).
Hose diameter is too large?
Use smaller diameter hose or replace
hose.
Discharge does not stay on
coupling.
Green lamp stays on.
Pressure too high?
Check pressure, add additional clamp.
Hose kinked or end blocked?
Check hose.
Impeller does not turn, pump
is hard to start.
Green and red lamps OFF.
Impeller jammed or blocked?
Open pump cover and clean dirt and
debris from inside housing.
Impeller and volute binding?
Adjust clearance by removing shim from
behind impeller.
Defective engine?
See Engine Owner's Manual.
Содержание QP3Ti
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