| Item | Part No. | Part Name | Qty | Serial No. |
| 20B-60-21500 | VALVE ASS'Y | 1501- | ||
| 1 | \6\ | BODY | 1501- | |
| 2 | \6\ | SPOOL | 1501- | |
| 3 | 20B-60-21520 | COVER | 1501- | |
| 4 | 20B-60-21530 | O-RING | 1501- | |
| 5 | 20B-60-21540 | SEAL | 1501- | |
| 6 | 20B-60-21550 | PLATE | 1501- | |
| 7 | 20B-60-21560 | PLATE | 1501- | |
| 8 | 20B-60-21590 | CASE | 1501- | |
| 9 | 20B-60-21630 | SPRING | 1501- | |
| 10 | 20B-60-21620 | SLEEVE | 1501- | |
| 11 | 20B-60-21610 | BALL | 1501- | |
| 12 | 20B-60-21580 | END | 1501- | |
| 13 | 20B-60-21570 | COVER | 1501- | |
| 14 | 20B-60-21670 | BOLT | 1501- | |
| 15 | 20B-60-21650 | BOLT | 1501- | |
| 16 | 20B-60-21660 | BOLT | 1501- | |
| 17 | 20B-60-21640 | PLUG | 1501- |