V1.4 22 of 22 04/01/2009
Excessive power draw.
• Pressure too high.
• Liquid is more viscous than originally expected.
• Suction or discharge lines obstructed.
• Insufficient horsepower.
• Drive shaft and pump misaligned.
• Pump binding due to insufficient end clearance.
• Pump shaft is bent.
• Misalignment within the pump due to bad piping or poor installation, causing strain
or distortion.
Pump is noisy.
• Pump is cavitating due to inadequate suction conditions.
• Misalignment of coupling.
• Coupling is set too close to pump.
• Vibration of pump due to worn or bent shaft.
• Air leaks on suction side of pump or air entrainment in the fluid.
Pump leaks.
• Cover bolts need tightening or cover gasket is defective.
• Worn or defective seal.
Material Returns
If it becomes necessary to return a pump to the factory, a Return Goods Authorization
(RGA) must be obtained from either your local Authorized Distributor or our Chicago plant.
No RGA can be issued until a completed Material Safety Data Sheet (MSDS) has been
forwarded to our Chicago plant and return of the pump approved.
• Tuthill pumps are precision built and must be handled with care.
• Pumps must be drained of all fluid and the ports plugged to prevent foreign
material from getting into the pump.
• Pumps must be packaged securely to prevent damage while in transit.