TM10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
3-38. ELECTRIC MOTOR (R.O. PUMP) MAINTENANCE - continued.
INSPECTION
a.
Inspect leads and windings of stator assembly (32) for evidence of cracked or burned insulation.
b.
Inspect rotor (8) for loose or burned conducting bars.
c.
Inspect bearings (7 and 10) for wear.
d.
Inspect shields (6 and 31) for cracks and corrosion.
e.
Using multimeter set to OHMS Xl scale, connect test leads to pairs of motor leads, 1 and 7 to 2 and 8, 1 and
7 to 3 and 6,2 and 8 to 3 and 6.
f.
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 housing. Connect other lead to
each motor lead in turn.
h.
If multimeter indication is not infinity for each motor lead, replace stator assembly.
REPAIR
Replace defective components.
ASSEMBLY
a.
Using arbor press, install bearings (7 and 10) on shaft of rotor (8).
b.
Position shield (6) on stator assembly (32) as marked during disassembly.
c.
Install four bolts (5).
WARNING
Rotor is heavy/difficult to handle. Use two personnel when installing rotor in stator assembly.
CAUTION
Stator assembly wiring inside motor casing can be damaged by rotor or rotor shaft if rotor is not
installed carefully Guide rotor carefully while installing it.
d.
Position rotor (8) through fan side of stator assembly (32) and into shield (6). Bearing (7) must seat in shield
(6).
e.
Install wavy washer (11) in bearing seat of shield (31).
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