TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 CONNECTING ROD ASSEMBLY REPAIR 0143 00 INSPECTION (Continued) 7. Inspect connecting rod (1) bearings (5, 7). a. Visually inspect connecting rod bearing halves (5). BASIS FOR BEARING REJECTION ACCEPTABLE BEARING FLAWS Separation of bearing metal, or signs of possible separation. Fine scratches on bearing surface. Pieces of metal or dirt particles embedded in bearing surface with a concentration of 5 per cent or more of the surface area. Minute pieces of metal and dirt particles embedded in bearing surface with a concentration of less than 5 per cent. (Do not attempt to remove such particles.) Pitting or any other form of destruction to bearing surface. Raised metal at edges of scratches. b. Apply a thin coating of Prussian blue (item 25, WP 0173) to the backs of the connecting rod bearing halves (5) to check contact area (after dimensional check). c. Install bearing halves (5) in their respective connecting rods (1) and caps (4) according to the location markings. d. Apply lubricant (item 23, WP 0173) to rod bolt (8) threads and nut (3) seat. e. Assemble rod (1) and cap (4) and torque-tighten progressively, first to 100-150 inch- pounds, then to 600-650 inch-pounds (50-54 foot-pounds, or 68-73 N•m), and finally to 1250-1300 inch-pounds (104-108 foot-pounds, or 141-147 N•m). WP 0143 00-6 1 8 4 3 5 5