Gorman-Rupp Pumps 88A2-F6L 1306307 thru 1341411 - Manual (Page 17)

OM−02720 80 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 the engine ignition and
disconnect the positive battery
cable to ensure that the pump will
remain 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 gas-
ket.
Suction lift or discharge head too
high.
Strainer clogged.
Suction check valve or foot valve
clogged or binding.
Add liquid to casing. See PRIMING.
Clean or replace check valve.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leak-
ing or worn seal or gasket.
Check piping installation and install
bypass line if needed. See INSTAL-
LATION.
Check strainer and clean if neces-
sary.
Clean valve.
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 gas-
ket.
Suction intake not submerged at
proper level or sump too small.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leak-
ing or worn seal or gasket.
Check installation and correct sub-
mergence as needed.