| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 421-64-15501 | VALVE | H20051- | |
| 1A | 421-64-15510 | BODY | H20051- | |
| 2 | 421-64-15520 | SPOOL | H20051- | |
| 3 | 421-64-15530 | POPPET | H20051- | |
| 4 | 421-64-15540 | SPRING | H20051- | |
| 5 | 421-64-15550 | O-RING | H20051- | |
| 6 | 421-64-15560 | END | H20051- | |
| 7 | 421-64-15570 | SPRING | H20051- | |
| 8 | 421-64-15580 | O-RING | H20051- | |
| 9 | 421-64-15590 | PLUG | H20051- | |
| 10 | 421-64-15910 | BOOT | H20051- | |
| 11 | 421-64-15920 | SEAL | H20051- | |
| 12 | 421-64-15930 | WIPER | H20051- | |
| 13 | 421-64-15940 | COVER | H20051- | |
| 14 | 421-64-15950 | BOLT | H20051- |