Gorman-Rupp Pumps VGH5B31-B 1379872 thru 1211802 - Manual (Page 19)

OM−06128 VGH SERIES
TROUBLESHOOTING PAGE D − 1
TROUBLESHOOTING − SECTION B
Review all SAFETY information in Section A.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power
source and take the necessary pre-
cautions to ensure that the pump will
remain inoperative.
3. Allow the pump to completely cool if
overheated.
4. Check the temperature before open-
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
Table D-1 Troubleshooting Chart
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO PRIME Auxiliary priming device faulty or im-
properly installed.
Discharge check valve open.
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gas-
ket.
Strainer clogged.
Repair priming device or check
installation.
Check position of handle; close
valve.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leak-
ing or worn seal or gasket.
Check strainer and clean if neces-
sary.
PUMP STOPS OR FAILS
TO DELIVER RATED
FLOW OR PRESSURE Air leak in suction line.
Lining of suction hose collapsed.
Suction intake not submerged at
proper level or sump too small.
Strainer clogged.
Correct leak.
Replace suction hose.
Check installation and correct sub-
mergence as needed.
Check strainer and clean if neces-
sary.