| Item | Part No. | Part Name | Qty | Serial No. |
| 421-64-15400 | VALVE ASSEMBLY, STEERING DEMAND | |||
| 1 | (NSS) | HOUSING, VALVE | ||
| 2 | (NSS) | SPOOL | ||
| 3 | (NSS) | SPOOL | ||
| 4 | 421-64-15440 | PLUG | ||
| 5 | 421-64-25250 | PLUG | ||
| 5 | 421-64-25290 | PLUG | ||
| 6 | 421-64-15460 | O-RING | ||
| 7 | 421-64-15470 | O-RING | ||
| 8 | 421-64-15480 | RING, BACK-UP | ||
| 9 | 421-64-15490 | SPRING | ||
| 10 | 421-64-15710 | POPPET | ||
| 11 | 421-64-15340 | SPRING | ||
| 12 | 421-64-15730 | SCREW | ||
| 12 | 423-64-15530 | SCREW | ||
| 13 | 421-64-15740 | SEAT, SPRING | ||
| 13 | 423-64-15540 | SEAT, SPRING | ||
| 14 | 421-54-15750 | SPRING | ||
| 14 | 423-64-15550 | SPRING | ||
| 15 | 421-64-15760 | CAP (STRAIGHT) | ||
| 15 | 421-64-25270 | CAP (STEP) | ||
| 16 | 421-64-15420 | BOLT, SOCKET HEAD | ||
| 16 | 421-64-25420 | BOLT, SOCKET HEAD | ||
| 17 | 421-64-15780 | O-RING | ||
| 18 | 421-64-15790 | O-RING | ||
| 19 | 421-64-15810 | PLUG | ||
| 20 | 421-64-15820 | O-RING | ||
| 21 | 421-64-15310 | PLUG | ||
| 22 | 421-64-15330 | POPPET | ||
| 23 | 421-64-15850 | O-RING | ||
| 24 | 421-64-15860 | SPRING | ||
| 25 | 421-64-15320 | SHIM | ||
| 26 | 421-64-15870 | O-RING | ||
| 27 | 421-64-15720 | PLUG | ||
| 28 | 421-64-15880 | VALVE, RELIEF | ||
| 29 | 421-64-15890 | VALVE, OVERLOAD RELIEF | ||
| 30 | 421-64-15170 | O-RING | ||
| 31 | 421-64-15830 | PISTON | ||
| 32 | 421-64-15840 | PISTON | ||
| 33 | 421-64-25240 | CAP, STEP | ||
| 34 | 421-64-25250 | SLEEVE | ||
| 35 | 07000-11007 | O-RING | ||
| 36 | 07000-12012 | O-RING | ||
| F1 - ORDER PART NUMBER 421-64-25302 WHEN REPLACING THE STEERING | ||||
| DEMAND VALVE. | ||||
| F2 - USED WITH STEERING DEMAND VALVE 421-64-15400 ONLY. | ||||
| F3 - USED WITH STEERING DEMAND VALVE 421-64-25302 ONLY. | ||||