TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download

TM9-2815-202-34 Section Il. ENGINE REPAIR SPECIFICATIONS (Cont) (1) (2) 4) NEW WEAR POINT OF MEASUREMENT MINIMUM MAXIMUM LIMIT (inches) (inches) (inches) CRANKSHAFT WITH MAIN BEARING Crankshaft Journals Diameter of main bearing journal 4.4985 Diameter of connecting rod journal 2.9985 Main bearing journal out-of-round Connecting rod journal out-of-round Taper of main bearing journal Taper of connecting rod journal Main Bearings Inside diameter of bearing, vertical axis 4.5016 Bearing to journal clearance 0.0014 Thickness of bearing 0.1545 Thrust Washer Bearings Thickness of thrust washer bearings 0.1190 Crankshaft end thrust clearance 0.004 PISTON, CONNECTING ROD, AND CYLINDER LINER ASSEMBLY Cylinder sleeve Inside diameter of cylinder sleeve 4.2489 Outside diameter Standard size 4.6250 Oversize (0.010) 4.6350 Oversize (0.020) 4.6450 Oversize (0.030) 4.6550 Sleeve to cylinder block bore clearance 0.0000 Sleeve out-of-round 0.0000 Taper of sleeve Depth of cylinder sleeve below block 0.0450 Variation in depth between adjacent sleeves Piston (trunk) Outside diameter of piston (at skirt) 4.2393 Piston to cylinder sleeve clearance 0.0080 Piston out-of-round Taper of piston Inside diameter of piston pin bushing 1.5025 Piston (cross-head) Outside diameter of dome (top) 4.2389 Piston skirt outside diameter 4.2428 Skirt to cylinder sleeve clearance 0.0045 Piston pin bore diameter 1.5000 Piston Pin (trunk) Diameter of piston pin 1.4996 Length of piston pin 3.605 Pin-to-piston bushing clearance 0.0025 Pin to connecting rod bushing clearance 0.0025 Pin end to retainer clearance 0.016 4.5002 3.0002 0.00025 0.0005 0.0006 0.0008 4.5040 0.0055 0.1552 0.1220 0.011 4.2511 4.6265 4.6365 4.6465 4.6565 0.0020 0.0020 0.0010 0.0500 0.0020 4.2415 0.0118 0.0005 0.0005 1.5030 4.2423 4.2450 0,0083 1.5030 1.5000 3.620 0.0034 0.0034 0.064 0.0010 0.0005 0.0006 0.0055 0.018 ● 0.025 0.0025 0.0020 0.0500 0.002 ● 0.0140 ● ● 1.505 0.0120 1.5040 1.498 0.010 0.010 0.064 G-2