ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
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4-12.4
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4-12.5
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Inspect rotor assembly (18) for broken windings, evidence of overheating, damaged insulation, and loose termi-
nal ends.
Inspect frame/stator (5) for broken windings, evidence of overheating, damaged insulation, loose terminal
ends, and damaged housing.
Inspect drive pIate (9) and retention disk(15) for bends, cracks, elongated mounting holes, and other damage.
Inspect flywheel (10) for cracks, broken teeth, stripped threads, and other damage.
Inspect generator fan (8) for cracks, bent, or broken blades and other damage.
Repair. generator assembly by replacing damaged components.
If ring gear (11, FIGURE 4-25) is damaged, place the flywheel (10) on a solid surface.
Drive ring bearing gear (11) off with a brass drift and hammer.
WARNING
Oil fumes or oil can ignite above 380°F (193°C). Use a thermometer and do not
exceed 360°F(182°C). Do not allow a flame or heating element to be in direct con-
tact with oil. Heat oil in a well ventilated area. Plan a safe handling procedure to
avoid burns.
WARNING
Wear protective gloves to help prevent burns from handling hot ring gear (11).
If frame heat is used, be sure gear is heated uniformly around circumference. Do
not overheat. Overheating may also destroy original heat treatment of gear.
Heat new ring gear (11) to 300°F (148°C) using either heated oil, oven heat, or frame heat.
Turn gear so side with chamfer is toward engine with flywheel installed.
Install ring gear (11 ) against shoulder of flywheel.
Clean and inspect all mating surfaces.
Coat mating area between bearing (19, FIGURE 4-25) and end bell (31) with grease (Item 9, Appendix C).
Install packing (37), terminal block (36), and bolts (35) on end bell (31).
Install exciter stator (34) on end bell (31) with Iockwashers (33) and bolts (32).
Attach exciter stator leads and AC voltage regulator leads to terminal block (36) and remove tags.
Install end bell (31) on frame/stator assembly (5) with washers (30) and bolts (29). Torque bolts (29) 29 to 31
ft-lbs (39 to 42 Nm).
Install cover (28) and retention plate (25) on end bell (31) with Iockwashers (24) and (25), and bolts (23) and
(26).
Using overhead lifting device, reposition generator assembly on worktable with end bell (31) resting on table.
Using arbor press, press exciter rotor (22) on rotor assembly (18) to shoulder of shaft. Connect F1+ and F2-
Ieads on rotating rectifiers with washers (21) and nuts (20). Torque nuts (20)23 to 26 in-lbs (2.6 to 2.9 Nm).
Remove tags.
Press bearing (19) onto shaft of rotor assembly (18).
4-29
Assembly.
