TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 653 of 1275

8-2 ALTERNATOR — CONTINUED

b. Installation

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Install drive coupling (28), new gasket (27), and accessory drive housing (25) onto flywheel housing (26).

Install six new lockwashers (24) and six bolts (23).

CAUTIO N

Ž Care must be taken when pushing radiator away from cooling fans to protect

radiator fins from damage.

• Care must be taken that inlet hose and radiator-to-aeration detector hose do not

disconnect from radiator.

Carefully push radiator (20) away from cooling fans (21) using a pinch bar. Be careful not to damage

equipment or disconnect inlet hose (17) or radiator-to-aeration detector hose (19).

Alternator weighs 47 lb (21.4 kg). Use care and grip firmly when installing to avoid

serious injury.

With radiator (20) separated from cooling fans (21), carefully install grommet (22) and alternator (5).

Install six new lockwashers (7) and six mounting nuts (6).

Remove pinch bar, returning radiator (20) to original position.

Tighten clamp (18) at radiator-to-aeration detector hose (19).

Tighten inlet hose clamp (16).

Secure radiator vent hoses (15) by installing three clamps (14), three flat washers (13), three new lockwashers

(12), and three screws (11).

Install two flat washers (10), two new lockwashers (9), and two screws (8).

Connect alternator-to-rectifier wiring harness (4) at alternator (5).

Install cover (3), seven new lockwashers (2), and seven screws (1).

8-8

TM 9-2350-311-20-1

WARNIN G