ARMY TM 9-2805-262-14 AIR FORCE TO 38G2-90-1 NAVY NAVFAC P613-14E Table 6-2.  Engine Repair and Replacements Limits (cont). Measurements Item Maximum* Minimum* Clearances: Front main 0.0020 0.0010 (0.0051) (0.0025) Center main 0.0030 0.0013 (0.0076) (0.0033) Rear main 0.0020 0.0010 (0.0051) (0.0025) Connecting rod 0.0053 0.0039 (0.0135) (0.0099) End Play 0.0090 0.0030 (0.0229) (0.0076) Crankshaft Gear Backlash 0.0040 0.0020 (0.0102) (0.0051) Gear O.D. 1.1630 1.1620 (2.9540) (2.9515) Gear backlash 0.0070 0.0030 (0.0178) (0.0076) CYLINDERS Bore diameter 2.2515 2.2495 (5.7188) (5.7137) Out-of-round 0.001 TIR o 000 TIR (0.0025) (0 0000) Taper 0.0020 0 0000 (0.0051) (0.0000) Piston clearance 0.0015 0.005 (0.0038) (0.0127) TIMING GEAR 0.0040 0 0020 Backlash (0.0102) (0.0051) *Measurements in inches(mm). Change 2  6-27/(6-28 blank)