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 Change 3 2–43 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 25 Before Recuperator Assembly CHIEF OF SECTION WARNING Do not attempt to remove drain plug complete- ly. Hydraulic fluid in recuperator assembly is under high pressure and could cause injury. CAUTION • If drain plug is loosened for draining hydraulic fluid, check for leaks after tightening cover. • To prevent damage to gasket or cover, loosen cap screws to stop pins before rotating cover. Before firing, check pins (1) in recuperator assem- bly (2) from outside of vehicle, and check pins (3) in recuperator head (4) from inside vehicle. Pins must extend from 1/4 to 3/4 inch (6.4 to 19.05 mm). If pins extend beyond 3/4 inch (19.05 mm), fill recup- erator assembly (2) by removing valve cap (5) from valve (6). Fill M3 oil gun (item 17, Table 2–1) and add hydraulic fluid (item 20, Appx D) until pins ex- tend 1/4 inch (6.4 mm). If pins extend less than 1/4 inch (6.4 mm), loosen drain plug (7) and drain hy- draulic fluid until pins extend 1/4 inch (6.4 mm). Pins (1 and 3) cannot be brought into spe- cified range. 1 2 3 4 5 6 CAP SCREW COVER 5 6 7