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 223 of 775

TM 9-2350-311-10

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 (4 to 4° 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

0 when air

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

2

0 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

0. 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.

Change 2

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