Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 OPERATION Kap.6 , Seite 11 of 12
GRZ-2698572-v1-Operation.FM
Excessive wear on bearing
Pump and motor are not in
true alignment
Check pump/motor alignment
or re-align
Pump shaft broken or running
off centre
Replace the pump shaft and
bearing
Rotating objects or pump parts
causing friction in the pump
Disassemble and check the
inside of the pump
Impeller damaged or
unbalanced
Disassemble the pump and
replace the impeller if
necessary
Insufficient or excessive
lubrication
Check pump for appropriate
lubrication
Bearing not installed properly
or dirty
Replace bearing assembly if
necessary and check the
lubricating system for
contamination
Pump overheating/jamming
Delivery-side valve closed Open valve
The pump flow rate is below
the permitted minimum level
(cavitation)
Check the requirements of the
pump system
Pump and motor are not in
true alignment
Check pump/motor alignment
or re-align
Bearing worn or loose Disassemble the pump and
replace the bearings if
necessary
Pump shaft broken or running
off centre
Replace the pump shaft and
bearing
Impeller damaged or
unbalanced
Disassemble the pump and
replace the impeller if
necessary
Rotating objects or pump parts
causing friction in the pump
Disassemble and check the
inside of the pump
Flow resistance in the pipe is
greater than the calculated
delivery head for the pump
Check and minimise the pipe
resistance
Malfunction Possible cause Remedy
Tab. 6-7 Operating malfunctions and troubleshooting
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