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TM5-4120-387-14
a.
Inspection
(1) Check motor for rotational freedom by spinning shaft by hand. If there
is any stiffness or binding, contact direct support maintenance.
(2) Pull and push shaft axially to check for end play. If there is
excessive end play, contact direct support maintenance.
b.
Test
(1) Using a multimeter set on lowest OHMS scale, check continuity between
pins in connector J2 as follows:
(See fig. 4-7.)
l
l
l
(2)
is open.
Pin G to pin H
Pin J to pin E
Pin O to pin F
If there is no continuity between any pair of pins, the motor winding
Replace motor.
(3) Using a multimeter set on high OHMS scale, check continuity between
pins G, H, J and ground.
If continuity-is found, replace motor. -
NOTE
If all the above inspections and
the motor will still not operate
supervisor and Direct Support Ma”
c.
Remova 1
(1) Using two wrenches, (one holding
tests are satisfactory, but
properly, notify your
ntenance.
the self-locking nuts and the other
rotating the screws) remove the four screws, washers, and self-locking nuts in
motor mounting flange.
(2) Using wrench, remove two screws, lockwashers, and flat washers in
support legs of motor.
(3) Remove two spacers from motor bracket.
(4) Remove eight screws holding motor bracket to housing.
(5) Pull motor through condenser fan cavity for enough to access J2
connector.
(6) Disconnect plug P2 from connector J 2 .
(7) Rotate motor bracket 90° clockwise, pull motor out slightly away from
insulation, rotate motor 90° clockwise and remove motor from unit.
4-144
Change 3
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