| Item | Part No. | Part Name | Qty | Serial No. |
| (21J-60-12181) | MAIN VALVE ASS'Y | 1201- | ||
| (21J-60-12180) | MAIN VALVE ASS'Y | 1001-1200 | ||
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1680-01A1 TO Y1680-04A1. | ||||
| 1 | TM3503-229 | COVER | 1001-1200 | |
| 2 | TM8072-113 | BOLT | 1001-1200 | |
| 3 | TM3509-070 | VALVE | 1001-1200 | |
| 4 | TM8202-005 | O-RING | 1001-1200 | |
| 5 | TM8202-016 | O-RING | 1001-1200 | |
| 6 | TM8202-011 | O-RING | 1001-1200 | |
| 7 | TM8072-092 | BOLT | 1001-1200 | |
| 8 | TM8202-009 | O-RING | 1001-1200 | |
| 9 | TM8202-001 | O-RING | 1001-1200 | |
| 10 | TM3526-591 | CAP | 1001-1200 | |
| 11 | TM8110-030 | NUT | 1001-1200 | |
| 12 | TM3519-025 | SCREW | 1001-1200 | |
| 13 | TM3526-577 | CAP | 1001-1200 | |
| 14 | TM0209-004 | O-RING | 1001-1200 | |
| 15 | TM8202-004 | O-RING | 1001-1200 | |
| 16 | TM0859-253 | RING | 1001-1200 |