TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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e. Repair. Repair or replace damaged parts. Refer to paragraph 6-4e, table 6-3, and figure 6- 15 through 6-17 when replacing crankcase studs. Repair of crankcases by welding is permissible except in areas of high stress such as radii, webbing, and bosses. Refer to paragraph 6-4c for general welding instructions and (1) through (3) below for specific information on welding repair of the crankcase. (1) Repair by blending, of nicks, grooves, or impact damage on the inside of crankcase on the underside of the cylinder deck machined surface is permitted providing damage does not progress into restricted area indicated in figure 6- 13. Damaged cylinder stud holes may be repaired, but entire missing sections may not be replaced. It is permissible to repair machined surface mounting bosses on pads which have been damaged by fretting, scoring or impact except in those areas indicated in figure 6-13. Weld surfaces must be restored to specified dimensions by machining. Figure 6-13. Crankcase restricted welding areas. 6-19