TM 9-4110-256-14
4-35.
AC MOTOR B2 TESTING AND REPLACEMENT.
This task covers: a. Testing
b. Removal
c. Installation
INITIAL SETUP
Equipment Conditions:
Materials / Parts:
Lock Washers (12)
disconnected.
Self Locking Nuts (4)
General Safety Instructions:
Marker tags (4)
WARNING
High voltage and exposed rotating
parts are used in the refrigeration unit.
Personal injury can result if power is
connected.
(1) Remove four bolts (1) and terminal cover (2).
(2) Tag and disconnect wire leads (3).
(3) Using multimeter set to measure continuity, check AC motor (4) winding continuity between leads T1 to T2, T1 to
T3, and T3 to T2. Continuity should be indicated. If continuity was not indicated, replace motor.
(4) Using multimeter set to measure continuity, check AC motor (4) winding continuity between each lead T1, T2,
and T3 to motor frame ground. No continuity should be indicated. If continuity was indicated, replace motor.
(5) If no failure was indicated, connect wire leads (2) using tags and wiring diagram (fig. 1-4). Remove tags.
(6) Install terminal cover (2) and four bolts (1).
b. Removal.
(1) Remove four bolts (1) and terminal cover (2).
(2) Tag and disconnect wire leads (3).
(3) Remove conduit locknut (5), strain relief cable bushing (6), and wire leads (3).
(4) Remove four self locking nuts (7) and flat washers (8). Discard self locking nuts.
(5) Slip V belt (9) off pulley (10) and remove AC motor (4).
(6) Loosen set screw (11) and remove pulley (10) and key (12).
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