Wacker Neuson PT 3A, Operator'S Manual

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PT 2/3 /... Maintenance
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3.20 Troubleshooting
Problem / Symptom Reason / Remedy
Pump does not take in water. • Not enough priming water in housing.
• Engine speed too low. Adjust speed.
• Strainer plugged. Clean strainer.
• Suction hose damaged. Replace or repair hose.
• Air leak at suction port. Check that fittings are tight
and housing cover O-rings are sealing properly.
• Pump too high above water.
• Debris collecting in pump housing. Clean pump
housing.
• Too much clearance between impeller and insert.
Pump takes in water, little or
no discharge.
• Engine speed too low. Adjust speed.
• Suction strainer partially plugged. Clean strainer.
• Impeller worn. Adjust clearance by adding shims or
replace impeller.
• Volute insert worn or damaged. Adjust clearance or
replace insert.
Suction hose leaks at inlet. • Clamps are not sealing properly. Tighten, replace, or
add clamp.
• Hose diameter is too large.
• Hose is damaged.
Discharge hose does not stay
on coupling.
• Pressure may be too high for clamps being used.
Add another clamp.
• Hose kinked or end blocked. Check hose.
Impeller does not turn; pump
is hard to start.
• Impeller jammed or blocked. Open pump cover and
clean dirt and debris from inside of pump housing.
• Impeller and insert binding. Adjust clearance by
removing shim from behind insert.