TM-9-2320-361-34
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
MAY 1992
TM-9-2320-361-34 - Page 161 of 764
TM 9-2320-361-34
7-2. 60 AMPERE ALTERNATOR REPAIR (Contd)
b. Cleaning
For general cleaning instructions, refer to para. 2-8.
c. Inspection
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
7-10
For general inspection instructions, refer to para. 2-9.
Inspect end housing (2) for cracks, breaks, and stripped threads. Replace end housing (2) if
defective.
Check brushes (11) for roughness, galling, and wear. Replace brushes (11) if rough, worn, or brush
length is less than 0.250 in. (6.35 mm).
Check brush holder (8), brush holder insulator (9), and positive rectifier insulator (3) for cracks and
breaks. Replace brush holder (8), brush holder insulator (9), or positive rectifier insulator (3) if
cracked or broken.
Check brush springs (10) for damage. Replace brush springs (10) if damaged.
Check output plate (1) for burned, frayed, or broken wiring. Replace output plate (1) if defective.
Check rectifier terminals (4) and (6) in rectifier plates (5) and (7) for continuity in one direction and
infinite resistance in opposite direction. Replace rectifier terminals (4) or (6) if defective. Check for
shorts from rectifier terminals (4) and (6) to rectifier plates (5) and (7). Replace rectifier plate (5)
or (7) if defective.
Check stator (18) for grounds. Touch multimeter negative probe to stator (18) and positive probe to
the following stator leads: (a) lead
(15),
(b) lead (16), and (c) lead (17). If continuity is present in any
check, stator (18) is grounded; replace alternator.
Check stator (18) for open circuits. Touch multimeter probes to the following stator leads: (a) leads (15)
and (16), (b) leads (16) and (17), and (c) leads (15) and (17). If continuity is NOT present in any check,
replace alternator.
Check rotor
(14)
for grounds. Touch multimeter probe to rotor shaft (13) and other probe to
slipring (12). If ohmmeter does not read over 10,000 ohms, replace alternator.
Inspect rotor (14) bearing surfaces (TM 9-214). If bearing is defective, replace.
Inspect intermediate housing
(20)
for cracks, breaks, and stripped threads. Replace alternator if
cracked, broken, or threads are stripped.
Inspect drive end housing (19) for cracks and breaks. Replace alternator if housing (19) is cracked or
broken.
Replace end cover (21) if all components pass testing and problem remains.
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