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Troubleshooting – Gorman-Rupp Pumps 11 1/2A52-B 1241127 and up User Manual

Page 19

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TROUBLE

POSSIBLE CAUSE

PROBABLE REMEDY

PUMP FAILS TO
PRIME

Strainer clogged.

Check strainer and clean if neces-
sary.

Suction lift or discharge head too high.

Check piping installation and install
bypass line if needed. See INSTAL-
LATION.

Leaking or worn seal or pump gasket.

Check pump vacuum. Replace

leaking or worn seal or gasket.

Lining of suction hose collapsed.

Replace suction hose.

Air leak in suction line.

Correct leak.

PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE

Air leak in suction line.

Correct leak.

Lining of suction hose collapsed.

Replace suction hose.

Not enough liquid in casing.

Add liquid to casing. See
PRIMING.

Suction check valve contaminated or
damaged.

Clean or replace check valve.

Suction intake not submerged at
proper level or sump too small.

Check installation and correct
submergence as needed.

Impeller or other wearing parts worn
or damaged.

Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.

OM−00615

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 manual.
2. Disconnect or lock out the power

source 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.