| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 175-27-31114 | CASE,L.H. | 12128-23979 | |
| 1 | 175-27-31124 | CASE,R.H. | 12128-23979 | |
| 2 | 175-27-31132 | GASKET | 12128-23979 | |
| 3 | 175-27-31463 | FLANGE | 12128-@ | |
| 4 | 01010-31850 | BOLT | 12128-@ | |
| 5 | 01643-31845 | WASHER | 12128-@ | |
| 6 | 175-27-31495 | PINION | 12128-@ | |
| 6 | \0\175-27-31494 | PINION | 12128-17324 | |
| 7 | 170-09-13210 | BEARING | 12128-@ | |
| 8 | 175-27-31161 | CAGE | 12128-@ | |
| 9 | 07000-05235 | O-RING | 12128-@ | |
| 10 | 07013-10120 | SEAL,OIL | 12128-@ | |
| 11 | 01010-31640 | BOLT | 12128-@ | |
| 12 | 01643-31645 | WASHER | 12128-@ | |
| 13 | 170-27-11232 | SPACER | 12128-@ | |
| 14 | 195-27-12620 | WASHER | 20080-@ | |
| 14 | 170-27-11246 | WASHER | 12128-20079 | |
| 15 | 170-21-12141 | NUT | 12128-@ | |
| 16 | 01010-31225 | BOLT | 20080-@ | |
| 16 | 01010-51230 | BOLT | 12128-20079 | |
| 16A | 01643-31232 | WASHER | 12128-@ | |
| 17 | 175-27-31171 | COVER | 23891-23979 | |
| 17 | 175-27-31170 | COVER | 12128-23890 | |
| 18 | 07000-05150 | O-RING | 12128-23979 | |
| 19 | 175-27-00051 | SHIM ASS'Y | 12128-23890 | |
| 19 | \6\ | SHIM, 0.5MM | 12128-23890 | |
| 19 | \6\ | SHIM, 0.2MM | 12128-23890 | |
| 19 | \6\ | SHIM, 0.1MM | 12128-23890 | |
| 20 | 170-09-13220 | BEARING | 12128-@ | |
| 21 | 175-27-31233 | PINION | 12128-@ | |
| 22 | 175-27-31255 | GEAR | 17325-@ | |
| 22 | \0\175-27-31254 | GEAR | 12128-17324 | |
| 23 | 175-27-31260 | KEY | 12128-@ | |
| 24 | 175-27-31270 | SPACER | 12128-@ | |
| 25 | 175-27-31282 | HOLDER | 12128-@ | |
| 26 | 175-27-32470 | WASHER | 12128-@ | |
| 27 | 01010-31230 | BOLT | 12128-@ | |
| 28 | 170-09-13230 | BEARING | 12128-@ | |
| 29 | 170-09-13240 | BEARING | 12128-@ | |
| 30 | 175-27-31292 | COVER | 23891-23979 | |
| 30 | 175-27-31291 | COVER | 12128-23890 | |
| 31 | 175-27-00061 | SHIM ASS'Y | 12128-23890 | |
| 31 | \6\ | SHIM, 0.1MM | 12128-23890 | |
| 31 | \6\ | SHIM, 0.2MM | 12128-23890 | |
| 31 | \6\ | SHIM, 0.5MM | 12128-23890 | |
| 32 | 07000-05260 | O-RING | 12128-23979 | |
| 33 | 01010-32055 | BOLT | 17325-@ | |
| 33 | 01010-52055 | BOLT | 12128-17324 | |
| 34 | 01643-32060 | WASHER | 12128-@ | |
| 35 | 04020-01842 | PIN | 17325-@ | |
| 35 | 177-27-11120 | PIN | 12128-17324 | |
| 36 | 01010-32035 | BOLT | 12128-@ | |
| 37 | 01643-32060 | WASHER | 12128-@ | |
| 38 | 07040-13618 | PLUG | 17325-@ | |
| 38 | \0\07041-13612 | PLUG | 12128-17324 | |
| 39 | 07002-03634 | O-RING | 17325-@ | |
| 39 | 07000-03032 | O-RING | 12128-17324 | |
| 40 | 07044-03620 | PLUG | 12128-@ | |
| 41 | 07002-03634 | O-RING | 17325-@ | |
| 41 | 07000-03032 | O-RING | 12128-17324 | |
| 42 | 01010-32050 | BOLT | 12128-23979 | |
| 43 | 01643-32060 | WASHER | 12128-23979 | |
| 44 | 01010-31640 | BOLT | 12128-23979 | |
| 45 | 01643-31645 | WASHER | 12128-23979 | |
| 46 | 175-27-32611 | GUARD,L.H. | 12128-@ | |
| 46 | 175-27-32641 | GUARD,R.H. | 12128-@ | |
| 47 | 01010-32455 | BOLT | 12128-@ | |
| 48 | 01643-32460 | WASHER | 12128-@ | |
| 49 | 07040-13618 | PLUG | 17325-20079 | |
| 49 | \0\07041-13612 | PLUG | 12128-17324 | |
| 50 | 07002-03634 | O-RING | 17325-20079 | |
| 50 | 07000-03032 | O-RING | 12128-17324 | |
| 51 | 175-27-31530 | PLATE | 12128-@ | |
| 52 | 175-27-31540 | LOCK | 12128-@ | |
| 53 | 01010-31230 | BOLT | 12128-@ |