TM 5-4520-256-14
4-6. BLOWER, PUMP, AND MOTOR ASSEMBLY MAINTENANCE - Continued.
d. Motor Testing.
(1)
Rotate motor shaft by hand to check for freedom of rotation.
(2)
Use a multimeter and check for open windings.
(3)
Use a multimeter and check start and run capacitors.
e. Motor Disassembly/Repair.
(1)
Remove two screws (23), cover (24), two screws (22), and conduit box (25), and ground screw (26).
(2)
Remove two screws (15) and cover (16).
WARNING
Discharge capacitors using a flat tip plastic handle screwdriver across terminals prior to
disconnecting wires. Failure to do so can cause an electrical shock.
(3)
Tag and disconnect wiring and remove start capacitor (27).
(4)
Remove two screws (17) and cover (18).
(5)
Tag and disconnect wiring and remove run capacitor (28).
(6)
Remove key (8).
(7)
Remove four nuts (21), four screws (1), and four washers (2).
(8)
Remove endbell (3), spring (4), bearing (5), and fan (6), from shaft and rotor assembly (9).
(9)
Remove endbell (20), stationary switch (19), shim (13), bearing (12), rotary switch (11), and spacer (10).
(10)
Remove shaft and rotor assembly (9) from frame/stator and base assembly (14) and remove baffle (7).
(11)
Replace defective parts as required.
f. Reassembly.
(1)
Install baffle (7), shaft and rotor assembly (9) into frame/stator and base assembly (14).
(2)
Install spacer (10), rotary switch (11), bearing (12), shim (13), stationary switch (19), and endbell (20).
(3)
Install fan (6), bearing (5), spring (4), and endbell (3).
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