| Item | Part No. | Part Name | Qty | Serial No. |
| 20R-01-28200 | COUPLING ASS'Y | 18001- | ||
| 1 | 20R-01-11210 | RUBBER | 18001- | |
| 2 | 20N-01-12160 | BOSS | 18001- | |
| 3 | 01252-41035 | BOLT | 18001- | |
| 4 | 04025-00408 | PIN,SPRING | 18001- | |
| 5 | 01252-31030 | BOLT | 18001- | |
| 6 | 20S-01-17110 | COVER | 18001- | |
| 7 | 01010-51020 | BOLT | 18001- | |
| 8 | 01010-51025 | BOLT | 18001- | |
| 9 | 01643-31032 | WASHER | 18001- |