Gorman-Rupp Pumps UNIT 608 1347755 thru 1395613 - Manual (Page 18)

UNIT SERIES OM−01228
TROUBLESHOOTING PAGE D − 1
TROUBLESHOOTING − SECTION D
Review all SAFETY information in Section A.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Unplug the motor to ensure that the
pump will remain inoperative.
3. Allow the pump to completely cool if
overheated.
4. Close the eductor control valve.
5. Check the temperature before open-
ing any covers, plates, or plugs.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
UNIT FAILS TO
PRIME
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
Pump fails to start. Check electrical connections.
Air leak in suction line. Correct leak.
Lining of suction hose collapsed. Replace suction hose.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
leaking or worn seal or gasket.
Air leak in suction line. Correct leak.
Suction intake not submerged at proper Check installation and correct
level or sump too small.
submergence as needed.
Lining of suction hose collapsed. Replace suction hose.
Impeller or other wearing parts worn Replace worn or damaged parts.
or damaged. Check that impeller is properly
centered in the pump casing and
that it rotates freely.
Impeller clogged. Free impeller of debris.
Leak in hose assembly above product Replace hose.
level.
Clogged nozzle and/or hose assembly. Backflush system.
Open circuit in motor windings or Check motor continuity.
power cable.