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 2–56 Change 3 Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER — CONTINUED Location Item No. Not Fully Mission Capable If: Crewmember Procedure Item to Check/ Service Interval 36 During Recuperator Assembly (Cont) CHIEF OF SECTION a. After firing 100 rounds sustained fire, check pins (1) in recuperator assembly (2) from outside of vehicle and check pins (3) in recuperator head (4) from inside of vehicle. Pins must extend from 1/4 to 3/4 inch (6.4 to 19.05 mm). Pins (1 and 3) cannot be brought into specified range. b. If pins are not extended within this range, bleed or fill recuperator assembly. If pins extend be- yond 3/4 inch (19.05 mm), remove valve cap (5) from valve (6) and add hydraulic fluid (item 20, Appx D) until pins extend 1/4 inch (6.4 mm). If pins extend less than 1/4 inch (3.2 mm), loosen drain plug (7) and drain hydraulic fluid until pins extend 1/4 inch (6.4 mm). 3 4 1 2 5 6 CAP SCREW COVER 7 36.1 During Variable Recoil Assembly CHIEF OF SECTION CAUTION During operation, there shall be no more than 1 ml (approximately 25 drops) of oil accumula- tion at any seal interface location. Immediately following this determination oil accumulations are to be wiped clean prior to an additional five (5) rounds. Check for oil accumulation at seal interface(s) and for any hydraulic leaks.