| Item | Part No. | Part Name | Qty | Serial No. |
| 23B-40-11101 | VALVE ASS'Y,STEERING | 12001- | ||
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.2711 AND 2713. | ||||
| 23A-40-11201 | VALVE ASS'Y,STEERING, UB-S2-A | 12001- | ||
| 237-40-12560 | HOUSING ASS'Y,CONTROL | 12001- | ||
| 1 | \6\ | HOUSING | 12001- | |
| 2 | \6\ | SLEEVE,CONTROL | 12001- | |
| 3 | \6\ | SPOOL,CONTROL | 12001- | |
| 4 | 237-40-12620 | PIN | 12001- | |
| 5 | 237-40-12610 | SPRING,CENTER RING | 12001- | |
| 6 | 237-40-12550 | RETAINER | 12001- | |
| 7 | 237-40-12540 | BALL | 12001- | |
| 8 | 237-40-12520 | SEAT | 12001- | |
| 9 | \6\ | O-RING (K6) | 12001- | |
| 10 | 237-40-12490 | SCREW,SET | 12001- | |
| 11 | \6\ | O-RING (K6) | 12001- | |
| 237-40-12460 | BEARING ASS'Y | 12001- | ||
| 12 | 237-40-12480 | NEEDLE | 12001- | |
| 13 | 237-40-12470 | RACE | 12001- | |
| 14 | \6\ | O-RING (K6) | 12001- | |
| 15 | 23A-40-11280 | BUSHING | 12001- | |
| 16 | 237-40-12420 | RING | 12001- | |
| 17 | \6\ | SEAL,DUST (K6) | 12001- | |
| 18 | 237-40-12640 | PLATE,SPACER | 12001- | |
| 19 | \6\ | O-RING (K6) | 12001- | |
| 20 | 237-40-12650 | SHAFT | 12001- | |
| 21 | 23A-40-11220 | DRIVE | 12001- | |
| 22 | 23A-40-11230 | SPACER | 12001- | |
| 23 | 237-40-12670 | CAP,END | 12001- | |
| 24 | \6\ | O-RING (K6) | 12001- | |
| 25 | 23A-40-11210 | SCREW | 12001- | |
| 26 | \6\ | SEAL (K6) | 12001- |