| Item | Part No. | Part Name | Qty | Serial No. |
| 2691-4-31200 | GEAR CASE ASS'Y | 2501- | ||
| 1 | 2691-4-31210 | CASE,GEAR | 2501- | |
| 2 | 2691-4-31220 | CASE,GEAR | 2501- | |
| 3 | 01010-31650 | BOLT | 2501- | |
| 4 | 01602-01648 | WASHER,SPRING | 2501- | |
| 5 | 2691-4-11250 | BOLT,REAMER | 2501- | |
| 6 | 01602-01648 | WASHER,SPRING | 2501- | |
| 7 | 01580-01613 | NUT | 2501- | |
| 8 | 01010-31650 | BOLT | 2501- | |
| 9 | 01602-01648 | WASHER,SPRING | 2501- | |
| 10 | 01580-01613 | NUT | 2501- | |
| 11 | 01010-30825 | BOLT | 2501- | |
| 12 | 01602-00825 | WASHER,SPRING | 2501- | |
| 13 | 2691-4-31240 | CAP | 2501- |