Removal. - TM-5-4320-273-140125

TM 5-4320-273-14

distinguish from the rectifier module by the red and

replace the stator.

black leads. Using an ohmmeter, all continuity

(a) With positive meter probe connected to

black wire No. 1 and negative probe connected to

checks shall indicate infinite resistance. Any other

black wire No. 2, the multimeter should indicate ap-

reading indicates that a short circuit exists and the

proximately 1.00 ohm resistance.

regulator must be replaced. The ohmmeter probe con-

(b) With positive meter probe connected to

nections shall be as follows:

black wire No. 1 and negative probe connected to the

(a) Positive probe connected to red lead.

dark blue wire (center tap), the resistance should be

Negative probe connected to engine ground.

(b) Positive probe connected to engine ground.

approximately 0.50 ohm.

Negative probe connected to red lead.

(c) With positive meter probe connected to

black wire No. 2 and negative probe connected to the

Negative probe connected to black lead.

dark blue wire (center tap), the resistance should be

approximately 0.50 ohm.

(d) Positive probe connected to black lead.

Negative probe connected to red lead.

(d) With the positive meter probe connected to

black lead No. 1 and negative probe connected to the

(e) Positive probe connected to black lead.

Negative probe connected to engine ground.

red lead, the resistance should be 2.75 ohms.

(e) With the positive meter probe connected to

b. Removal.

black lead No. 2 and negative probe connected to the

(1) Remove screws (1, fig. 6-3), lockwashers (2)

red lead, the resistance should be 1.75 ohms.

and flywheel screen (3) from the flywheel shroud (4).

(f) Any connection between a lead and engine

(2) Using a punch, drive pin (1, fig. 6-4) from

ground should indicate infinite resistance. Any other

crankshaft. Remove nut (2) and lockwasher (3) that

reading indicates that a short circuit exists and the

secure the flywheel (4) to the crankshaft.

stator must be replaced.

CAUTION

(3) To check the rectifier module, which you can

Take care when you remove the

distinguish from the regulator by the two black leads,

flywheel; it weighs about 50 pounds

use an ohmmeter and static check continuity.

(22.68 kg). Do not damage the stator of

Replace the rectifier module if tests indicate

the alternator which is mounted on

malfunctioning.

the gear cover and recesses within

(a) With the positive meter probe connected to

the magnetic rotor of the flywheel.

the engine ground and the negative probe connected

(3) Remove the flywheel (4) by pulling outward

to black lead No. 1, the meter should indicate 5 to 15

ohm resistance.

on the flywheel fins while you strike the end of the

crankshaft with a brass drift or aluminum hammer.

(b) With the positive meter probe connected to

Do not use a hard hammer, as you may damage the

black lead No. 1 and the negative probe connected to

crankshaft and bearings. The flywheel will slide off

the engine ground, the resistance shall be infinite.

Any other reading indicates that a short circuit

the taper of the crankshaft. Remove Woodruff key

exists.

(5).

(4) Remove stator assembly (4, fig, 6-13) by

removing screws (l), lockwashers (2), and pins (3) that

the engine ground and the negative probe connected

to black lead No. 2, the resistance shall be 5 to 15

secure the stator to the flywheel shroud and engine

gear cover.

ohms.

(5) Remove the nuts (5), lockwashers (6), and

(d) With the positive meter probe connected to

black lead No. 2 and the negative probe connected to

screws (7) that secure the rectifier module (8),

the engine ground, the resistance shall be infinite.

regulator module shield (9), and regulator module

Any other reading indicates a short circuit exists.

(10). Remove the screws (11) that secure the isolation

(4) Check the regulator module, which you can

diode (12).

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