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Gorman-Rupp Pumps 16D60-F3L 1270259 thru 1318306 User Manual

Page 19

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OM--05534

10 SERIES

TROUBLESHOOTING

PAGE D -- 2

Table 1. Trouble Shooting Chart (cont.)

TROUBLE

POSSIBLE CAUSE

PROBABLE REMEDY

PUMP STOPS OR FAILS

TO DELIVER RATED

FLOW OR PRESSURE

(cont.)

Leaking or worn seal or pump gas-

ket.

Strainer clogged.

Suction intake not submerged at

proper level or sump too small.

Impeller or other wearing parts

worn or damaged.

Impeller clogged.

Discharge head too high.

Suction lift too high.

Pump speed too slow.

Check pump vacuum. Replace

leaking or worn seal or gasket.

Check strainer and clean if neces-

sary.

Check installation and correct sub-

mergence as needed.

Replace worn or damaged parts.

Check that impeller is properly cen-

tered and rotates freely.

Free impeller of debris.

Install bypass line.

Measure lift w/vacuum gauge. Re-

duce lift and/or friction losses in

suction line.

Check engine output; consult en-

gine operation manual.

PUMP REQUIRES TOO

MUCH POWER

Pump speed too high.

Discharge head too low.

Liquid solution too thick.

Bearing(s) frozen.

Check engine output.

Adjust discharge valve.

Dilute if possible.

Disassemble pump and check

bearing(s).

PUMP CLOGS

FREQUENTLY

Discharge flow too slow.

Suction check valve or foot valve

clogged or binding.

Liquid solution too thick.

Discharge line clogged or re-

stricted; hose kinked.

Open discharge valve fully to in-

crease flow rate, and run engine at

maximum governed speed.

Clean valve.

Dilute if possible.

Check discharge lines; straighten

hose.

EXCESSIVE NOISE

Cavitation in pump.

Pumping entrained air.

Pump or drive not securely

mounted.

Impeller clogged or damaged.

Reduce suction lift and/or friction

losses in suction line. Record vacu-

um and pressure gauge readings

and consult local representative or

factory.

Locate and eliminate source of air

bubble.

Secure mounting hardware.

Clean out debris; replace damaged

parts.