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 RECLAMATION – Continued CAUTION Extreme care must be taken to assure that metal is removed from the rocker cover only. Do not remove any stock from cylinder head portion of the bore. (7) Bore the camshaft gear housing pilot diameter to 2.500 to 2.5015 inch to a depth of 0.3400 inch on both sides of the cylinder head on the same center line as the camshaft bearing bore. Machine stock from the sides of the rocker cover and cylinder head to provide an uninterrupted flat surface between the two parts. The two sides must be parallel with dimension of 6.2420 minimum for rework purposes. (8) Stamp the necessary match marks on both the cylinder and cover to indicate a matched assembly. REPAIR 1. Refer to WP 0005 00 for general repair instructions. 2. Cylinder interior repair. NOTE Intake and exhaust valve guides are removed from the cylinder in the same manner. The intake valve guide mechanical puller is used for intake valve guide removal and the exhaust valve guide mechanical puller is used for exhaust valve guide removal. (1) Insert screw of mechanical puller through the valve guide and puller and install nut on the end of puller screw (Figure 6). Preheat entire assembly in oven to 350° F (177° C) maximum before removing valve guide. Remove valve guide by tightening nut on the end of the puller screw. Figure 6. Removing Intake Valve Guide Using Mechanical Puller. 0012 00-8 Change 1