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 2-10.3 Transmission Shift Control Lever — Continued b. 1 (1st Gear) Use when: 1 Setting vehicle in forward motion during field operation. Upshift to a higher gear when vehicle speed permits. 2 Ascending or descending steep grades and on soft, muddy, or rough terrain. 3 Making short forward radius turns. Short radius turns on hard surfaces should be initiated from a stand-still. (Maximum speed is 6 mph.) c. 2 (2nd Gear) Use when: 1 Towing heavy loads. 2 Ascending or descending steep grades and on extremely muddy or rough terrain. 3 Making short forward radius turns. (Maximum speed is 9 mph.) 2-104