TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
Page 519 of 670
TM9-2815-202-34 (3) Using feeler gage, measure ring side clearance. Refer to Table 6-2 for ring side clearance specifications. g. Assembly (1) Connecting Rod Assembly to Piston (a) Apply clean engine oil to piston pin and piston pin bushings. Do not drive piston pin retainer in too far. Retainer may move piston bushing inward and result in reduce piston pin end clearance. (b) Insert one piston pin retainer (9) in position. Then place crowned end of installer (14) against retainer and strike installer just hard enough to deflect retainer and seat it evenly in piston (10). NOTE Since loading on the piston pin is downward, it must have free movement to secure perfect alinement and uniform wear. Therefore, the piston pin has a full floating fit in connecting rod and piston bushings. Large clearances of 0.010 inch maximum are allowed. (c) (d) (e) Place upper end of connecting rod assembly (12) between piston pin bosses and in line with piston pin holes. Then slide piston pin (11) in place. Install second piston pin retainer (9) as directed in step (b). Check for piston pin end clearance by cocking connecting rod and shifting pin in bushings. 6-37