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 Item No. 75 Interval Quar- terly Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER Location Item to Check/ Service Variable Recoil Assembly (Cont) Crewmember Procedure CHIEF OF SECTION c. Elevate cannon tube and check operation of variable recoil assembly components. d. Index arrows (9) should begin to separate be- tween 600 mils and 800 mils. If arrows do not separate, notify unit maintenance. NOTE M109A2/M109A3/M109A4 M185 cannon as- sembly has one torque key groove. M109A5 M284 cannon assembly has two torque key grooves. e. Check for dirt/water accumulation and rust on sector gears (10) and torque key groove (11). f. Lubricate sector gears (10) and torque key groove (11) with grease (item 19, Appx D) or grease (item 18, Appx D) and replace dust shield (8) and variable recoil access cover (4). Not Fully Mission Capable If: Arrows do not separate. Change 2 2-87