Gorman-Rupp Pumps 16C20-F4L 1317844 and up - Manual (Page 20)

OM-01604 10 SERIES
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 man­
ual.
2. Switch off engine ignition and dis­
connect the positive battery cable
to ensure that the pump will re­
main inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau­
tiously.
7. Drain the pump.
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO PRIME Not enough liquid in casing.
Suction check valve contaminated or
damaged.
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Suction lift or discharge head too high.
Strainer clogged.
Add liquid to casing. See PRIMING.
Clean or replace check valve.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leaking
or worn seal or gasket.
Check piping installation and install by­
pass line if needed. See INSTALLA­
TION.
Check strainer and clean if necessary.
PUMP STOPS OR FAILS
TO DELIVER RATED
FLOW OR PRESSURE Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Strainer clogged.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leak­
ing or worn seal or gasket.
Check strainer and clean if neces­
sary.