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Problem
Possible Cause
Corrective Action
replace it
Air entering the pump or the
suction tubing
Check the seals of the connections
A narrowing in the suction
Tubing
Use tubing suitable for working
under suction pressure
Low rotation speed
Check the voltage at the pump.
Adjust the voltage and/or use
cables of greater cross-section
The suction tubing is resting on
the bottom of the tank
Raise the tubing
Increased pump noise
Cavitations occurring
Reduce suction pressure
Irregular functioning of the
by-pass
Dispense until the air is purged
from the circuit
Air present in the diesel fuel
Verify the suction connections
Leakage from the pump
body
Seal damaged
Check and replace the mechanical
seal
Parts Diagram
