ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
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4-11.2
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b.
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f.
g.
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4-11.3
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N O T E
Use securing device to keep flywheel/generator fan (20) from turning.
Remove bolts (17), washers (18), Iockwashers (19), and rotor assembly (16) from engine flywheel/generator
fan (20).
Remove bolts (22), washers (23), Iockwashers (24), and drive disc (25) from rotor assembly (16).
Using gear puller, remove bearing (26) from rotor assembly (16).
Tag and disconnect F1+ and F2- leads (29) from rotating rectifiers by removing nuts (27) and washers (28).
Using gear puller, carefully remove exciter rotor (30) from rotor assembly (16).
Remove thru-bolts (31) from engine/generator adapter (15).
Remove bolts (32) and engine flywheel/generator fan (20) from engine crankshaft.
Inspect end bell assembly (5, FIGURE 4-24) for cracks, tom packing (11), broken terminal board (13), and
other damage.
Inspect exciter stator (10) for broken windings, evidence of overheating, damaged insulation, and loose termi-
nal ends.
Inspect bearing (26) for looseness and evidence of overheating.
Inspect exciter rotor (30) for broken windings, evidence of overheating, damaged insulation, and other damage.
Inspect rotorassembly(16) for broken windings, evidence of overheating, damaged insulation, and loose termi-
nal ends.
Inspect stator(14) for broken windings, evidence of overheating, damaged insulation, loose terminal ends, and
darnaged housing.
Inspect drive disc (25) for bends, cracks, elongated mounting holes, and other damage.
Inspect flywheel/generator fan (20) for cracks, bent or broken fan blades, broken teeth, stripped threads, and
other damage.
If ring gear (21, FIGURE 4-24) is damaged, place the flywheel (20) on a solid surface.
Drive ring bearing gear (21) 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 (21).
If flame 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 (21) to 300°F (148°C) using either heated oil, oven heat, or flame heat.
Turn gear so side with chamfer is toward engine with flywheel installed.
Install ring gear (21) against shoulder of flywheel,
4-25
Repair. Repair generator assembly by replacing damaged components.
Inspection.
