TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
Page 520 of 779
Figure 7-11 7-8. Pistons and Pins, Cylinder Crankshaft Damper and Oil Assemblies, Cylinder Air Deflectors, Filter Housing, and Oil Pan Refer to Table 7-4 for illustrations and assembly instructions. References are listed in the table. Table 7-4. Pistons and Pins, Cylinder Assemblies, Cylinder Air Deflectors, Crankshaft Damper and Oil Filter Housing, and Oil Pan Component References Pistons and Pins and Cylinder Assemblies Para 7-8a, Figs. 7-11 through 7-13, 5-144, 5-143 Cylinder Air Deflectors Para 7-8b, Figs. 5-142, 5-141 Crankshaft Damper and Oil Filter Housing Para 7-8c, Figs. 5-139, 5-138 Oil Pan Para 7-8d, Figs. 4-125, 5-137 through 5-135, 6-78, 6-80 a. Pistons and Pins and Cylinder Assemblies. Refer to the instructions given in (1) and (2), below. (1) Pistons. (a) The pistons are marked for iden- tification as shown in figure 7-11 to aid in in- stalling the pistons in their proper position. The piston boss is stamped with an arrow and the cylinder location (1R) to identify the cylinder from which the piston was removed and to assure piston will be returned to its original cylinder. The arrows on the piston pin bosses are pointed up, or to the exhaust outlet port. Cylinders are stamped with piston markings at the intake valve side (bottom) of valve rocker arm cover flange. Markings of any piston or cylinders must be renewed if position marks and / or arrows are not entirely legible. Replacement piston must be marked to the corresponding cylinder it is to be used with. At engine overhaul, all 12 pistons and pins are matched according to weight and cannot vary more than 5 oz. Always keep piston pin with its respective pin. 7-8