TM-9-2350-311-10

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

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 224 of 775

TM 9--2350--311--10

Change 6

2--125

2--10 OPERATING PROCEDURES — CONTINUED

2--10.7

Operating Miscellaneous Items — Continued

b. Engine Air Cleaner

1

For summer position, when temperatures are over 40

°

F(4

°

C), leave locking handles (3) in holders.

2

For winter position, when temperatures are below 25

°

F(-

-4

°

C), raise locking handles (3) and fasten on

hooks (4).

3

For intermediate temperatures between 25 to 40

°

F(-

-4to4

°

C), start engine with locking handles (3) in

winter position. When engine reaches operating temperature, place locking handles in summer position.

4

An air cleaner indicator (5) is located alongside the left air cleaner. It reads less than 25 in. H

2

O when

air cleaner is operating properly. When airflow is restricted, the gage reads 25 in. H

2

O or greater

indicating that the air cleaner element should be serviced (para 3--5.4). The air cleaner indicator gage

locks into position every 5 in. H

2

O. A reset button on the bottom of the air cleaner indicator gage must

be pushed to zero the gage.

NOTE

Air cleaner shown in winter position.