TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 GENERATOR DRIVE MECHANISM REPLACE/REPAIR (650 AMPERE) 0156 00 DISASSEMBLY 17 1. Remove generator drive gear assembly (17) from generator drive adapter (4). a. Go to Work Package 0039 and bench test the drive gear (18). 4 19 2. Check bearing (19) on each end of drive gear (18). 18 a. Look for broken, cracked or split rings, cracked, broken or loose separators, heat discoloration (brown-blue or blue-black color). Rotate the free race slowly and feel for roughness. If any of these conditions exists, the bearing must be replaced. 19 b. If either bearing needs replacement, go to step 3. c. If both bearings are OK, go to step 4. CAUTION Because the force used to press the bearing from the gear is through the individual balls and not the race, the bearing is destroyed when it is removed. Do not use either bearing once it has been pressed from the gear. 3. Remove generator drive gear (18) bearings (19). a. Using an arbor press (item 8, WP 0176), remove and discard ball bearing (19) from either end of drive gear (18). b. Press opposite end ball bearing (19) from drive gear (18) in a similar manner. 19 18 19 WP 0156 00-4