Troubleshooting - MULTIQUIP QP2E Operation And Parts Manual

Symptom
Pump does not take on
water.
Pump takes in water,
little or no discharge.
Suction hose leaks at
inlet.
Discharge does not stay
on coupling.
Impeller does not turn:
pump is hard to start.
QP2E CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #0 (02/12/09) — PAGE 25
Table 8.
Possible Cause
Not enough priming water in the housing?
Engine speed too low?
Strainner plugged?
Suction hose damaged?
Air leak at suction port?
Pump is located too high above water line?
Debris collecting in pump housing?
Too much distance between impeller and
volute?-
Water leaking out weep hole between pump
and engine?
Engine speed too low?
Suction strainer partially plugged?
Impeller/Volute worn?
Fittings/clamps are not sealed properly?
Hose diameter is too large?
Pressure too high?
Hose kinked or end blocked?
Impeller jammed or blocked?
Impeller and volute binding?
Defective engine?
Pump Troubleshooting
Add water.
Increase throttle.
Clean strainer.
Replace or repair hose, and clamps
Check that fi ttings are tight and properly
sealed.
Move pump closer to water.
Clean pump housing.
Adjust clearance by adding shims or replace
impeller. Min. .006"" - Max. .020""
Check condition of mechanical seal and
gaskets, between pump end and engine
housing.
Increase throttle speed.
Clean strainer.
Adjust clearance by adding shims or replace
impeller/volute
Tighten, replace or add clamp. (Keep extra
seals on pump)
Use smaller diameter hose or replace hose.
Check pressure, add additional clamp.
Check hose.
Open pump cover and clean dirt and debris
from inside housing.
Adjust clearance by removing shim from
behind impeller.
See Engine Owner's Manual.

TROUBLESHOOTING

Solution