| Item | Part No. | Part Name | Qty | Serial No. |
| \0 | 21D-30-12000 | IDLER, ASSY. | 21D5200330- | |
| \0 | 21D-30-12020 | IDLER, ASSY. (FOR RUBBER SHOE) | 21D5200330- | |
| \0 | 21D-30-12400 | IDLER, ASSY. | 21D5200330- | |
| 1 | 21D-30-12150 | SUPPORT | 21D5200330- | |
| 2 | 21D-09-84150 | SPRING PIN | 21D5200330- | |
| 3 | 21D-30-12140 | GASKET | 21D5200330- | |
| 4 | 21D-30-12120 | BUSHING | 21D5200330- | |
| 5 | 21D-30-12110 | IDLER | 21D5200330- | |
| 6 | 21D-09-57680 | PLUG | 21D5200330- | |
| 7 | 21D-09-69390 | O-RING | 21D5200330- | |
| 8 | 21D-30-12130 | SHAFT | 21D5200330- | |
| SEE FIG. 3210 |