Gorman-Rupp Pumps SE1 1/2B3-E.33 12V 1483930 and up - Manual (Page 13)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
MOTOR WILL NOT
RUN
MOTOR RUNS, BUT
PUMP FAILS TO
DELIVER RATED
DISCHARGE
SE SERIES OM−06490
TROUBLESHOOTING PAGE D − 1
TROUBLESHOOTING − SECTION D
Review all SAFETY information in Section A.
Hardened mud or sludge in impeller. Remove strainer, check and clean.
Poor connection at battery or vehicle Check and correct connections.
ground.
Impeller binding. Check freedom of rotation. Add shims
or gaskets as required.
Damaged power cable(s). Inspect and replace as required.
Open circuit in motor windings or power Check continuity.
cable.
Loose connection in motor cover. Remove cover, check connections
and correct as required.
Bad switch or circuit breaker. Check electrical components as
described in this section and replace
as required.
Worn motor brushes or out of position Disassemble pump, check and
to make contact with armature. replace brushes as required.
Strainer clogged. Check and clean as required.
Impeller binding. Check freedom of rotation. Add shims
or gaskets as required.
Discharge line clogged or restricted; Check discharge lines; straighten
hose kinked. hose.
Liquid being pumped too thick. Dilute liquid by heating if possible
.
Vehicle battery not fully charged. Start vehicle and allow to run until
battery is fully charged.
Worn impeller vanes; excessive impeller Check impeller and clearance. See
clearance.
PUMP END REASSEMBLY.
Pumping entrained air. Check liquid level in sump; check
position of pump.
Damaged or unbalanced impeller. Replace impeller.