TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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● ● k (c) (d) (e) (f) (9) TM9-2815-202-34 Aline piston pin holes in skirt (14) and dome (15), then push skirt into position on dome. Lubricate piston pin (12) and piston pin bushing (17) with engine oil and install piston pin. Install spacers (13) on piston pin bolts (11). Apply small amount of International Compound No. 2, or equivalent, to bolt threads and bolt head contact surfaces. Attach connecting rod (5) to piston pin (12) with two bolts (11) and two spacers (13). Tighten bolts finger tight. Clamp connecting rod (5) in soft- jawed vise and torque piston pin bolts (11 ) to 55-60 Ib-ft (75-81 N- m). Do not exceed this torque. CAUTION Insure piston pin retainers do not buckle during installation and seat completely in counterbore with width of land even around retainer to seal properly. (h) Insert piston pin retainer (9) in position. Place crowned end of piston pin installer (19) against retainer. Strike tool just hard enough to deflect retainer and to seat it evenly in skirt (14), Install second retainer in same manner. (i) Check each retainer for proper sealing with leak detector (20). Place suction cup over retainer and hand operate lever to pull a vacuum of ten inches of Hg. on gage. A drop in gage reading indicates air leakage at retainer. (2) Installation - Piston Rings (a) Lubricate piston rings and piston with engine oil before installing rings. Change 1 4-139