TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Remove Note. The main bearing caps are marked 1 through 7 (front to rear) to identify their locations. Identifying numbers also appear on bearing web in crankcase assembly. The caps are not interchangeable with each other and must be returned to their original positions during in- stallation. Note. Do not use a scriber or other sharp instrument for marking bearing halves. It is recommended that a grease pencil be used for mat-king bearing halves. 1. Cut locking wire and remove 24 slotted nuts (A) and 12 plate washers attaching main bearing caps, numbers 1, 2, 3, 5,6, and 7 to crankcase assembly. 2. Cut locking w ire and remove four slotted nuts (B) and two plate washers attaching main thrust bearing cap (No. 4 or center) to crankcase assembly. Install Note. Do not install locking wire until bearing cap nuts have been torque tightened (para 7-5c). 1. Apply antiseize compound (FSN 9150-663-1770) and install two plate washers and four slotted nuts (B) securing main thrust bearing cap (No. 4) to crankcase assembly. 2. Apply antiseize compound (FSN 9150-663-1770) and install 12 plate washers and 24 slotted nuts (A) securing main bearing caps, numbers 1, 2, 3, 5, 6, and 7 to crankcase assembly. Figure 5-173. Removing or installing main bearing attaching parts. 5-100