| Item | Part No. | Part Name | Qty | Serial No. |
| 20M-30-81301 | IDLER ASS'Y | 12559- | ||
| 20M-30-81300 | IDLER ASS'Y | 10001-12558 | ||
| 1 | 20M-30-81611 | IDLER | 10001- | |
| 2 | 20M-30-81620 | SHAFT | 10001- | |
| 3 | 20M-30-81631 | SUPPORT,L.H. | 10001- | |
| 4 | 20M-30-81641 | SUPPORT,R.H. | 10001- | |
| 5 | 20M-30-81650 | SEAL | 10001- | |
| 6 | 06000-06206 | BEARING | 10001- | |
| 7 | 04064-03015 | RING,SNAP | 10001- | |
| 8 | 01090-50840 | BOLT | 10001- | |
| 9 | 01643-50823 | WASHER | 10001- |