TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TABLE 6-1. TM9-2815-202-34 (9) When installing a new connecting rod assembly, stamp cylinder number on connecting rod (5) and cap (3). (4) Connecting Rod Bearings (a) (b) If one Inspect bearing shells for scoring, pitting, flaking, etching, and dirt grooving. If defective, discard bearing shells. Discard bearing shells with bright spots on backs indicating movement in bearing caps or supports. NOTE bearing shell is less than minimum thickness shown in Table 6-1, replace both bearing shells (upper-and lower). (c) Using a micrometer and ball attachment, measure thickness of lower bearing shell (4) and upper bearing shell (13) at point “C”, 90 degrees from parting line. e. Fitting Piston NOTE Fit new or used piston to corresponding cylinder liner and retain as matched set for assembly in engine. (1) Using a micrometer, measure piston skirt outside diameter parallel to and perpendicular with piston pin bore at room temperature, 70 o F (21 o C). Diameter must be 4.2428 to 4.2450 inches. Taper and out of round must not exceed 0.0005 inch. 6-35