ARMY TM 9-6115-673-13&P
AIR FORCE TO 35C2-3-512-1
AC ALTERNATOR ASSEMBLY. (MEP-531A)
a. Testing. (Alternator Installed)
(1)
Rotor: Using multimeter, measure resistance across the windings at P1-E and P1-F. Resistance
should be 13-18 ohms. If readings are not as stated, disassemble alternator and perform rotor
testing, refer to paragraph 5.26.d.
(2)
Stator:
(a)
Using a multimeter, measure resistance between P1 sockets P1-A and P1-B. Resistance
should be 0.7 -1.0 ohm. Replace stator if resistance is not as stated.
(b)
Using a multimeter, measure resistance between P1 sockets P1-C and P1-D.
Resistance should be 0.7 - 1.0 ohm. Replace stator if resistance is not as stated.
(c)
Using a multimeter, check for open circuit between P1 sockets P1-A and P1-C, P1-A and
P1-D, P1-B and P1-C, and P1-B and P1-D. Replace stator if resistance is found.
b. Removal.
(1)
Remove engine/alternator assembly, refer to paragraph 5.9.a.
(2)
Remove capscrews (1, Figure 5-39), lockwashers (2), washers (3), and alternator guard (4) from
alternator.
(3)
Tag stator wires and brush wires (6) connected by screws (5).
(4)
Remove screws (5), brush wires (6), and stator wires from bearing bracket (16).
(5)
Remove brush caps (7) and brushes (8) from bearing bracket (16).
(6)
Remove nuts (9 and 10), lockwashers (11), washers (12), bolts (13), washers (14), ground strap
(15), and bearing bracket (16) from stator assembly (18) and support bracket (17). Remove tie
wraps as required.
CAUTION
Do not contact stator windings with rotor when removing stator assembly.
Damage to stator and rotor may result. Also use care to avoid damage to
LOP switch.
(7)
Carefully remove stator assembly (18) and support bracket (17).
(8)
Loosen capscrew (19) and remove C-washer (20) from capscrew.
CAUTION
Do not tap on rotor windings or allow rotor to fall when removing rotor from
engine shaft. Damage to windings may result.
