| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 201-46-51102 | REVOLVING FRAME A.,(FOR KOMATSU PATTERN) | 20501- | |
| 201-46-51510 | REVOLVING FRAME A.,(FOR I.S.O. PATTERN) | 20501- | ||
| 2 | 203-46-31131 | COVER | 20501- | |
| 3 | 203-46-31181 | GASKET | 20501- | |
| 4 | 01010-51230 | BOLT | 20501- | |
| 5 | 01643-31232 | WASHER | 20501- | |
| 6 | 201-46-52111 | WEIGHT,COUNTER | 20501- | |
| 7 | 01011-52070 | BOLT | 20501- | |
| 8 | 01643-32060 | WASHER | 20501- | |
| 9 | 20X-70-21210 | SHAFT | 20501- | |
| 10 | 201-70-21210 | PLATE | 20501- | |
| 11 | 01010-51230 | BOLT | 20501- | |
| 12 | 01602-21236 | WASHER,SPRING | 20501- | |
| 13 | 203-70-34260 | SPACER¤ 0.5MM | 20501- | |
| 14 | 202-70-11640 | SPACER¤ 1.0MM | 20501- | |
| 15 | 201-70-51240 | SHAFT | 20501- | |
| 16 | 201-70-21210 | PLATE | 20501- | |
| 17 | 01010-51230 | BOLT | 20501- | |
| 18 | 01602-21236 | WASHER,SPRING | 20501- | |
| 19 | 202-70-48460 | SPACER¤ 1.0MM | 20501- | |
| 20 | 203-70-44430 | SPACER¤ 2.0MM | 20501- |