| Item | Part No. | Part Name | Qty | Serial No. |
| 20C-30-31200 | IDLER ASS'Y,FRONT | 10001-11878 | ||
| 1 | 20C-30-31210 | IDLER | 10001-11878 | |
| 2 | 20C-30-31220 | SUPPORT | 10001-11878 | |
| 3 | 20P-30-81621 | SHAFT | 10001-11878 | |
| 4 | 06000-06207 | BEARING | 10001-11878 | |
| 5 | 20P-30-81640 | SEAL | 10001-11878 | |
| 6 | 04064-03515 | RING,SNAP | 10001-11878 | |
| 7 | 01090-51050 | BOLT | 10001-11878 | |
| 8 | 01643-51032 | WASHER | 10001-11878 | |
| 9 | 20T-30-41510 | CYLINDER | 10001-@ | |
| 10 | 07000-13040 | O-RING | 10001-@ | |
| 11 | 20R-30-21550 | RING | 10001-@ | |
| 12 | 07016-00407 | SEAL,DUST | 10001-@ | |
| 13 | 201-30-24170 | SPACER | 10001-@ | |
| 14 | 04065-05220 | RING,SNAP | 10001-@ | |
| 15 | 07959-20000 | VALVE | 10001-@ | |
| 16 | 20T-30-41520 | ROD | 10001-@ | |
| 17 | 20U-30-12170 | PLATE | 10001-@ | |
| 18 | 20U-30-12180 | PLATE | 10001-@ | |
| 19 | 01010-81260 | BOLT | 10001-@ | |
| 20 | 01643-51232 | WASHER | 10001-@ | |
| 21 | 01010-80820 | BOLT | 10001-@ | |
| 22 | 01643-50823 | WASHER | 10001-@ |