TM 10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
3-34.
MOTOR (CHEMICAL FEED PUMP) MAINTENANCE - continued.
INSPECTION
a.
Inspect leads and windings of stator assembly (21) for evidence of cracked or burned insulation.
b.
Inspect rotor (17) shaft for loose or burned conducting bars.
c
Using growler, check rotor for shorts.
d.
Inspect bearings (16 and 18) for wear or damaged seals.
e.
Inspect end plate (1) for cracks.
f.
Using multimeter set to OHMS X 1 scale, check for shorts between stator assembly windings. If multimeter
indication is not 0 ohm, for each pair of windings, replace stator assembly.
g.
Set multimeter to OHMS X1000 scale. Connect one lead to stator assembly (21) housing. Connect other
lead to each set of stator assembly leads in turn. If multimeter indication is not infinity for each stator
assembly lead, replace stator assembly.
h.
Connect multimeter leads to capacitor leads. If multimeter indication is not infinity, replace capacitor.
i.
Set multimeter to OHMS XI scale. Connect leads to stationary switch leads. If multimeter indication is not 0
ohm, replace stationary switch. If multimeter indication is 0 ohm, but motor started only by hand during test,
replace centrifugal switch.
REPAIR
Replace defective components.
ASSEMBLY
a.
Using arbor press, install centrifugal switch (16) onto short end of rotor (17) shaft.
b
Install two bearings (15 and 18) on shaft of rotor (17).
c
Position stationary switch (2) on end plate (1) and install two screws (3).
d.
Carefully install end plate (1) on stator assembly (21) while guiding wiring (22) through side of stator
assembly (one wire goes to capacitor, the other to conduit box as tagged).
e.
Install end plate (1) on stator assembly (21).
f.
Position end plate (1) on stator assembly (21) as required, and install two bolts (23) through end plate and
stator assembly (21).
g.
Position gasket (4) on stator assembly (21).
3-192
