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 2–92 Change 3 2–9 INITIAL ADJUSTMENTS AND CHECKS — CONTINUED 2–9.2 Adjustments a. Adjusting Driver’s Seat 1 Raise vertical adjusting lever (1) to adjust driver’s seat (2) height. Release vertical adjusting lever to lock driver’s seat in position. 2 Raise horizontal adjusting bar (3) to adjust driver’s seat (2) forward and backward. Release horizontal adjusting bar to lock driver’s seat in position. 3 Press pawl (4) to position backrest assembly (5) forward or backward. Release pawl to lock backrest assembly in position. 4 Remove quick release pin (6) to raise or lower backrest assembly (5) to desired height. Install quick release pin to lock backrest assembly in position. 1 2 3 4 5 6