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 574 of 985

TM 9-2320-279-20-1

Electrical System Maintenance Instructions (Cont)

7-3. ALTERNATOR AND PULLEY REMOVAL/lNSTALLATlON (CONT).

(5)

Clamp pulley (13) in vise with soft jaws.

(6)

Loosen locknut (14) until shaft (15)

turns.

(7)

Using lockjaw pliers, hold inside

flange (16) of pulley (13) and remove

locknut (14).

NOTE

There are two types of alternator pulleys. Model

A has no key, while Model

B

includes one.

(8)

Remove pulley (13) from vise and

remove pulley and key (16.1) from

shaft (15).

6. Installation.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

Install key (1) and pulley (1.1) on

shaft (2).

Clamp pulley (1.1) in vise with soft

jaws.

Install locknut (3) on shaft (2) and

tighten until shaft (2) begins to turn.

Using lockjaw pliers, hold inside

flange (4) of pulley (1.1) and tighten

locknut (3) to 70 to 85 lb-ft (95

to 115 N •m).

Remove lockjaw pliers and

re-torque locknut (3).

Position alternator (5) on

mounting brackets (6).

Install mounting screw (7),

washer (8), and nut (9).

Do not tighten nut.

Place rear side of mounting

ear (10) against brace (11).

Install adjusting screw (12)

with lockwasher (13), and

washer (14) through brace

and into mounting ear. Do

not tighten.

Install five wires (15) with

three lockwashers (16) and

nuts (17).

C.

Follow-on Maintenance.

(1)

Install alternator belts

(para 6-15).

(2)

Connect batteries

(para 7-91).

(3)

Test alternator (para 7-2).

END OF TASK

7-6

Change 3