TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 6-9. Crankcase oil passages-schematic diagram. (2) Clean the main sleeve bearing halves with dry-cleaning solvent or mineral spirits paint thinner. Use a wooden scraper to remove sludge or gum deposits from bearing grooves and oil holes. Do not remove the bearing location markings made during engine disassembly. d. Inspection. (1) Castings. inspect the crankcase and related parts according to instructions covering castings in paragraph 6-3b and c. (2) Miscelaneous metal components. Refer to figure B-2 in Appendix B for parts iden- tification. Inspect crankcase tie rods (79) and oil seal retainer (44) for damaged threads and other unserviceable conditions. (3) Inspection of main sleeve bearings. (a) Inspection of main sleeve bearing surfaces (7.1, 7.2, 7.3, and 7.4, fig. B-3) is largely a matter of judgment and experience. The following instructions will assist in deter- mining whether a bearing is serviceable or whether it should be replaced. Replace any questionable bearings. (b) Separation of bearing metal, or signs of possible separation, requires that the bearing be replaced. 6-15