Gorman-Rupp Pumps 610M20-B 688324 and up - Manual (Page 18)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY
Free impeller of debris. Impeller clogged.
Measure lift w/vacuum gauge. Re-
duce lift and/or friction losses in
suction line. Suction lift too high.
Discharge head too low.
Dilute if possible. Liquid solution too thick.
Adjust discharge valve.
Open discharge valve fully to in-
crease flow rate, and run driver at
maximum governed speed. Discharge flow too slow.
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.
Clean out debris; replace damaged
parts. Impeller clogged or damaged.
Secure mounting hardware. Pump or drive not securely mounted.
Locate and eliminate source of air
bubble. Pumping entrained
air.
BEARINGS RUN
TOO HOT Bearing temperature is high, but
within limits.
Align drive properly. Drive misaligned.
Check piping installation for proper
support. Suction and discharge lines not prop-
erly supported.
Check for proper type and level of
lubricant. Low or incorrect lubricant.
Check bearing temperature regu-
larly to monitor any increase.
Check driver output. Pump speed too high.
Suction check valve or foot valve
clogged or binding. Clean valve.
Discharge head too high. Install bypass line.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
leaking or worn seal or gasket.
Suction intake not submerged at
proper level or sump too small. Check installation and correct sub-
mergence as needed.
Pump speed too slow. Check driver output; consult the
operation manual.
OM−01391 60 SERIES
TROUBLESHOOTING PAGE D − 2