| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 23B-70-52110 | CASE | 4001- | |
| 2 | 07000-15260 | O-RING | 4001- | |
| 3 | 07041-13012 | PLUG | 4001- | |
| 4 | 07002-13034 | O-RING | 4001- | |
| 5 | 07040-11812 | PLUG | 4001- | |
| 6 | 07002-11823 | O-RING | 4001- | |
| 7 | 23B-70-52290 | SEAL | 4001- | |
| 8 | 23B-70-52190 | BUSHING | 4001- | |
| 9 | 23B-70-52121 | WORM | 4001- | |
| 10 | 06002-30310 | BEARING | 4001- | |
| 11 | 01010-81030 | BOLT | 4001- | |
| 12 | 01643-31032 | WASHER | 4001- | |
| 13 | 23B-70-52320 | PLATE | 4001- | |
| 14 | 07042-70108 | PLUG | 4001- | |
| 15 | 238-70-16210 | SHIM¤ 0.1MM | 4001- | |
| 238-70-16220 | SHIM¤ 0.2MM | 4001- | ||
| 238-70-16240 | SHIM¤ 1.0MM | 4001- | ||
| 16 | 23B-70-52250 | HOUSING | 4001- | |
| 17 | 01140-81235 | STUD | 4001- | |
| 18 | 01582-11210 | NUT | 4001- | |
| 19 | 01643-31232 | WASHER | 4001- | |
| 20 | 07000-12130 | O-RING | 4001- | |
| 21 | 23B-70-52320 | PLATE | 4001- | |
| 22 | 23B-70-52360 | BUSHING | 4001- | |
| 23 | 23B-70-52330 | COVER | 4001- | |
| 24 | 23B-70-52340 | WHEEL,WORM | 4001- | |
| 25 | 01090-51455 | BOLT | 4001- | |
| 26 | 01595-01411 | NUT | 4001- | |
| 27 | 01643-31445 | WASHER | 4001- | |
| 28 | 23E-70-35130 | PIN | 4001- |