TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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6-21. Repair a. General. Refer to paragraph 6-4. b. Torsional Vibration Damper. Replace torsional vibration damper when it does not conform to limits specified in overhaul standards (table 6-11). Replace damper when dented or distorted. Remove minor imperfections with crocus cloth. c. Flywheel and Transmission Drive Gear- shaft. Repair elongated dowel pin holes in flywheel and gearshaft by reaming to either 0.005 or 0.010 inch oversize. Install the ap- propriate oversize dowel pins. It will be necessary to line ream the crankshaft flange, flywheel, and transmission drive gearshaft to install the replacement oversize pins. d. Transmission Drive Gearshaft Bushing- type Bearing. When the gearshaft bushing-type bearing needs replacement, use a suitable arbor and an arbor press to remove bushing-type bearing as shown in figure 6-42. Press new bushing-type bearing into gearshaft using arbor press as shown in figure 6-43. Ream the bushing-type bearing from 1.3775 to 1.3780 inch after installation. When oversize dowel pins have been installed in the crankshaft, trans- mission drive gearshaft dowel pin holes must be reamed to the proper oversize dimension. Figure 6-42. Pressing bushing-type bearing from transmission drive gearshaft. Figure 6-43. Pressing bushing-type bearing into transmission drive gearshaft. e. Accessory Drive Gear. Refer to paragraph 6-4h for repair of accessory drive gear. 6-46