TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
PUMP REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY
Impeller or other wearing parts worn
or damaged.
Free impeller of debris.
Impeller clogged.
Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
Discharge head too high.
Measure lift w/vacuum gauge. Re-
duce lift and/or friction losses in
suction line.
Suction lift too high.
Install bypass line.
Pump speed too slow.
Check driver output; consult driver
operation manual.
Pump speed too high.
Check driver output.
Discharge head too low.
Dilute if possible.
Liquid solution too thick.
Adjust discharge valve.
Pump or jack shaft bearing(s) frozen.
Disassemble, check and replace
bearing(s) as required..
Liquid solution too thick.
Open discharge valve fully to in-
crease flow rate, and run engine at
maximum governed speed.
Discharge flow too slow.
Dilute if possible.
Suction check valve or foot valve
clogged or binding.
Clean valve.
Suction intake not submerged at
proper level or sump too small.
Check installation and correct
submergence as needed.
Discharge check valve clogged.
Check and clean check vavle.
Strainer clogged.
Check strainer and clean if neces-
sary.
Belt or flexible coupling broken.
Check and replace as necessary.
Extreme ambient temperature.
Reduce pump output.
Fuel filter clogged (engine driven
units.
Check & replace often in extreme
operating conditions.
Check and replace as required.
Fuel contaminated
(engine driven
units.
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.
Leaking or worn seal or pump gasket.
Check pump vacuum. Replace
leaking or worn seal or gasket.
Eductor clogged.
Check and clean eductor.
MR--04835
PA SERIES PUMPS
TROUBLESHOOTING
PAGE B -- 2
