TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 572 of 985

TM 9-2320-279-20-1

Electrical System Maintenance Instructions (Cont)

7-2. ALTERNATOR TESTING (CONT).

a. Alternator Testing.

(1)

(2)

(3)

(4)

Connect voltmeter to negative terminal (1) and positive terminal (2). Meter should be between 26

and 28 volts at 1200 to 1500 rpm.

If output is not between 26 and 28 volts, adjust regulator (3) (para 7-6).

If output is still not between 26 and 28 volts, replace regulator (3) (para 7-5).

If output is still under 26 volts, replace alternator (para 7-3).

b. Follow-on Maintenance.

(1)

Shut off engine (TM 9-2320-279-10).

(2)

Install engine side panel (TM 9-2320-279-10).

(3)

Close engine cover (TM 9-2320-279-10).

END OF TASK

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