Gorman-Rupp Pumps 06D17-GAR 708768 thru 1000782 - 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.
Discharge throttling valve partially
closed: check valve is installed im-
properly. Open discharge valve fully; check
piping installation.
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
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.
Check bearings.
OM−01274 0 SERIES
TROUBLESHOOTING PAGE D − 2