TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 7 Support elevating piston rod (11) with supporting strap (15) through ballistic cover hole and around elevating piston rod. 8 Unlock key washer (16). 9 Remove round nut (17) and key washer (16) at forward end of elevating piston rod (11). Discard key washer. 10 Rotate headed grooved pin (18) to a position where flat surface on head will clear recoil cylinder. Use brass drift and hammer to drive out headed grooved pin. 5-5