TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 1-14.11 Location and Description of Power Pack Assembly The power pack assembly (1) mounted at the right rear of the cab, provides a supply of hydraulic fluid at a constant pres- sure for control and actuation of elevating, traversing, and ramming systems. It consists of a power pack reservoir (2), direct current motor (3), cover reservoir and body regulator valve (4), power valve (5), internal filter (6) on M109A2/M109A3 howitzers or two hydraulic external filters (7) on M109A4/M109A5 howitzers, and fluid level gage (8). a. Power Pack Reservoir. The power pack reservoir (2) supplies hydraulic fluid to gear-type rotary pump (9) and retains any hydraulic fluid that is not being used by the system. At the base of the power pack reservoir is a direct current motor (3), the prime source of power for the system. 1-29