TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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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 2-125