NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 CYLINDER ASSEMBLY OVERHAUL—Continued 0012 00 INSPECTION – Continued Table 1. Standard and Oversize Cylinder Identification Numbers. Part Number Bore Size Bore Diameter 10951304 Standard 5.751 – 5.753 in. 10951304-1 0.010 oversize 5.761 – 5.763 in. 10951304-2 0.020 oversize 5.771 – 5.773 in. 10951304-3 0.030 oversize 5.781 – 5.783 in. 10951304-4 0.040 oversize 5.791 – 5.793 in. (b) Cylinder bore measurement. Cylinder bores may taper slightly at the head end when at room temperature. The tapered section expands and is essentially straight at operating temperature. The procedure for measuring cylinder bore is as follows: (1) With the cylinder at room temperature, take two cylinder bore measurements at points A through E (Figure 3). Measure diameter approximately parallel to line of valves. Then take measurement 90 degrees to first measurement and average the measurements. (2) The head end measurement must not exceed the flange end average measurements. (3) Compare measurements taken 90 degrees apart. Each of two measurements must be within 0.003 inches (0.0762 mm) of each other. If the difference exceeds 0.003 inches (0.0762 mm), the cylinder is out of round and must be marked for repair. Figure 3. Cylinder Bore Dimensions. 0012 00-3 Change 1