TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Table 6-2. Crankcase Assembly Overhaul Standards Component Crankcase B-2 B-2 B-3 B-3 B-3 B-3 B-3 B-2 B-3 B-3 B-3 B-14 B-14 B-3 Ref. letter A B E V D F F B C-D T U H Q T-G Point of measurement Inside diameter of bearing bore in crankcase Outside width of main thrust bearing cap and thrust bearing surface in crankcase Thickness of main bearing half at center (refer to B-3, D-C, below) Thickness of main bearing half 1 / 2 inch from ends (to be 0.0005 to 0.0010 less than at center “E”) Inside diameter of main bearing at proper torque tightness (90 degrees to split line) (STD) 0.003 undersize 0.010 undersize Inside width of main thrust bearing face Fit of main thrust bearing over bearing cap and thrust bearing surface in crankcase Fit (oil clearance) of bearings on journals (refer to table 6-9) Outside width of main thrust bearing Thickness of main thrust bearing flange (refer to B-3, D-C, above) Inside diameter of bearing bore in crankcase liner (starter) Inside diameter of bearing bore in crankcase liner (generator) Fit (crankshaft end play) of thrust bearing in journal (refer to table 6-9) Sizes and fits of new parts 4.7538 4.7553 2.0240 2.0260 0.2492 0.2499 4.2545 4.2575 4.2515 4.2545 4.2445 4.2475 2.0300 2.0320 0.0040L 0.0080L 0.0040L 0.0080L 2.4860 2.4880 0.2270 0.2290 2.8346 2.8353 2.8346 2.8353 0.0110 0.0150L Wear limits ** ** 4.2585 4.2555 4.2485 * * 0.0100L 2.4840 2.8356 2.8356 0.0190L Note. Refer to paragraph 6-3b for explanation of symbols. 6-18