Dover PSG BLACKMER MRLN4B Инструкции по установке, эксплуатации и техническому обслуживанию - Страница 18
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DAMAGED VANES
Probable Cause
Foreign objects entering the pump.
Running the pump dry for extended periods of time.
Cavitation.
Viscosity too high for the vanes and /or the pump
speed.
Incompatibility with the liquids pumped.
BROKEN SHAFT
Probable Cause
Foreign objects entering the pump.
Viscosity too high for the pump speed.
Relief valve not opening.
Hydraulic hammer - pressure spikes.
SEAL LEAKAGE
Probable Cause
O-rings not compatible with the liquids pumped.
O-rings nicked, cut or twisted.
Shaft at seal area damaged, worn or dirty.
Ball bearings overgreased.
MOTOR OVERLOAD
Probable Cause
Horsepower of motor not sufficient for application
Improper wire size / wiring and/or voltage to motor.
Misalignment in pump drive system.
Excessive viscosity, pressure or speed.
TROUBLESHOOTING
Excessive heat.
Worn or bent push rods, or worn push rod holes.
Settled or solidified material in the pump at start-up.
Hydraulic hammer - pressure spikes.
Vanes installed incorrectly (see"Vane Replacement").
Pump/driver, driveline/drive shaft misalignment.
Excessively worn vanes or vane slots.
Settled or solidified material in the pump at start-up.
Overtightened V-belts, if used.
Pump sleeve bearings worn excessively.
Excessive cavitation.
Mechanical seal faces cracked, scratched, pitted or dirty.
Bearing locknuts adjusted improperly.
Faulty or worn bearings.
Rotor rubbing against head or cylinder.
Dirty mechanical seal faces.
106-A00
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