Gorman-Rupp Pumps 62 1/2A1-GX390 S/2 93740 CA and up - Manual (Page 15)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
Measure lift w/vacuum gauge. Re-
duce lift and/or friction losses in
suction line. Suction lift too high.
Dilute if possible. Liquid solution too thick.
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.
Check engine output. Pump speed too high.
Pump speed too slow. Check engine output; consult en-
gine operation manual.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
leaking or worn seal or gasket.
Exceeding operating limits. See performance curves in PUMP
MAINTENANCE AND REPAIR.
Free impeller of debris. Impeller clogged.
Impeller or other wearing parts worn
or damaged. Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
OM−06223 60 SERIES
TROUBLESHOOTING PAGE D − 2