Before using listening rod near spinning flywheel,
belts, etc, determine if it is long enough to avoid
In the l/2 and l/3 hp (0.37 and 0.25 kW) a noise
which cannot be traced to the pump is usually the check
T R A C E W I R I N G
F I N D F A U L T
MOTOR OFF AFTER A SHORT PERIOD OF TIME.
CHART l-MOTOR WON'T START
B R E A K E R O R F U S E
R E P L A C E C A P A C I T O R ,
S T A R T I N G S W I T C H ,
valve. (Larger units do not have a check valve.) Dis-
assemble the check valve and inspect. If cleaning does
not stop the noise, replace check valve.
Another noise which is not easily traceable is a
vibrating guard. Check the belt guard by applying hand
pressure to outside surfaces at different points.
M O T O R