| Item | Part No. | Part Name | Qty | Serial No. |
| 423-64-15902 | VALVE ASSEMBLY, STEERING DEMAND | | |
| 1 | (NSS) | HOUSING, VALVE | | |
| 2 | (NSS) | SPOOL | | |
| 3 | 421-64-15710 | POPPET | | |
| 4 | 421-64-15340 | SPRING | | |
| 5 | 423-64-15530 | SCREW | | |
| 6 | 421-64-15780 | O-RING | | |
| 7 | 423-64-15540 | SEAT, SPRING | | |
| 8 | 423-64-15550 | SPRING | | |
| 9 | 423-64-15560 | CAP | | |
| 10 | 421-64-15790 | O-RING | | |
| 11 | 421-64-15870 | O-RING | | |
| 12 | 421-64-15420 | BOLT, SOCKET HEAD | | |
| 13 | (NSS) | SPOOL | | |
| 14 | 421-64-15320 | SHIM | | |
| 15 | 421-64-15490 | SPRING | | |
| 16 | 421-64-15440 | PLUG | | |
| 17 | 421-64-15470 | O-RING | | |
| 18 | 421-64-15480 | RING, BACK-UP | | |
| 19 | 421-64-15450 | PLUG | | |
| 20 | 421-64-15460 | O-RING | | |
| 21 | 421-64-15880 | VALVE ASSEMBLY, RELIEF | | |
| 22 | 421-64-15720 | PLUG | | |
| 23 | 421-64-15330 | POPPET | | |
| 24 | 421-64-15860 | SPRING | | |
| 25 | 421-64-15310 | PLUG | | |
| 26 | 421-64-15850 | O-RING | | |
| 27 | 421-64-15810 | PLUG | | |
| 28 | 421-64-15820 | O-RING | | |
| 29 | 421-64-15890 | VALVE ASSEMBLY, RELIEF | | |
| N/I | 421-64-05110 | SERVICE KIT, STEERING DEMAND VALVE | | |
| | | | |
| | F1 - INCLUDED IN SERVICE KIT 421-64-05110. | | |
| | | | |
