TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9=2815-202-34 4-33. PISTON AND CONNECTING ROD MAINTENANCE (CROSS-HEAD) (Cent) WARNING Keep fingers out of piston pin holes and wear steel-toed shoes when disassembling piston dome from skirt. Personal Injury may result. (5) (6) (7) Separate piston skirt (14) from piston dome (15). Remove seal ring (16) from piston dome (15). Discard seal. Remove piston pin bushing (17) from piston dome (15). c. Cleaning ● ● (1) (2) I WARNING 16 Use goggles, rubber gloves, and rubber apron when cleanlng parts In carbon- removlng compound. Provide adequate ventilation. Avoid inhaling fumes and skin contact. If compound Is splashed on skin, flush with fresh water and wash with alcohol. Alcohol containing 2 to 3 percent camphor Is preferable. Compressed ah’ used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and personal protective equipment (goggles/ shield, gloves, etc). Clean piston components with fuel oil and dry with compressed air. If fuel oil does not remove carbon deposits, use carbon-removing compound which will not harm bushings or tin plate on piston. Clean ring grooves in dome with suitable tool or piece of an old compression ring ground to bevel edge. CAUTION u o 14 Do not wire brush or glass bead piston skirt. Skirt is tin plated, and wire brushing or glass beading will remove plating. (3) Clean inside surfaces of piston dome and skirt. Clean oil drain holes in lower half of piston skirt. Do not enlarge holes while cleaning them. ● 4-134