Multiquip QP2E manual Pump Troubleshooting, Symptom, Possible Cause, Solution

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

QP2E CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #0 (02/12/09) — PAGE 25