Gorman-Rupp Pumps 03H1-GR 287634 and up User Manual
Page 19
TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
Discharge head too low.
Adjust discharge valve.
EXCESSIVE NOISE
Cavitation in pump.
Reduce suction lift and/or friction
losses in suction line. Record vac
uum and pressure gauge readings
and consult local representative or
factory.
Secure mounting hardware.
Pump or drive not securely mounted.
Locate and eliminate source of air
bubble.
Pumping entrained air.
Pump speed too high.
Check driver output; check that
sheaves or couplings are correctly
sized.
Suction lift or discharge head too high.
Check piping installation and install
bypass line if needed. See INSTAL
LATION.
Low or incorrect lubricant.
Check for proper type and level of
lubricant.
Pump speed too slow.
Check power source output; consult
power source operation manual.
BEARINGS RUN
TOO HOT
Bearing temperature is high, but within
limits.
Check bearing temperature regu
larly to monitor any increase.
Low or incorrect lubricant.
Check for proper type and level
of lubricant.
Suction and discharge lines not prop
erly supported.
Check piping installation for proper
support.
Drive misaligned; piping improperly in
stalled.
Bearings in power source or gearbox
Check bearings.
worn or binding.
Realign drive and piping at operat
ing temperature. Add expansion
joints if required.
Discharge line clogged or restricted;
hose kinked.
Check discharge lines; straighten
hose.
Universal joint drive misaligned.
Align drive.
Universal joint drive misaligned.
Align drive.
Impeller or other wearing parts worn
or damaged.
Replace worn or damaged parts.
Check that impeller is properly cen
tered and rotates freely.
OM-01194
0 SERIES
TROUBLESHOOTING
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