| Item | Part No. | Part Name | Qty | Serial No. |
| (723-56-12104) | CONTROL VALVE | 53566- | ||
| (723-56-12103) | CONTROL VALVE | 52806-53565 | ||
| (723-56-12102) | CONTROL VALVE | 52450-52805 | ||
| (723-56-12101) | CONTROL VALVE | 51911-52449 | ||
| (723-56-12100) | CONTROL VALVE | 51480-51910 | ||
| (723-56-11103) | CONTROL VALVE | 51171-51479 | ||
| (723-56-11102) | CONTROL VALVE | 51135-51170 | ||
| (723-56-11101) | CONTROL VALVE | 51053-51134 | ||
| (723-56-11100) | CONTROL VALVE | 51000-51052 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1661-01A0 TO Y1661-11A0. | ||||
| \6\ | BLOCK GROUP | 51000- | ||
| 1 | \6\ | BLOCK | 51000- | |
| 2 | 144-14-54610 | O-RING | 51000- | |
| 3 | 723-56-31730 | O-RING | 51000- | |
| 4 | 702-75-11520 | O-RING | 51000- | |
| 5 | 07000-11008 | O-RING | 51000- | |
| 6 | \6\ | SLEEVE | 51000- | |
| 7 | \6\ | PISTON | 51000- | |
| 8 | 723-36-15340 | SPRING | 51000- | |
| 9 | \6\ | PISTON | 51000- | |
| 10 | 723-36-15240 | SPRING | 51000- | |
| 11 | 723-36-15250 | CASE | 51000- | |
| 12 | 07000-13042 | O-RING | 51000- | |
| 13 | 01252-60820 | BOLT | 51000- | |
| \6\ | COVER GROUP | 51000- | ||
| 14 | \6\ | COVER | 51000- | |
| 15 | 723-50-11311 | PLUG | 51000- | |
| 16 | 07000-11004 | O-RING | 51000- | |
| 17 | 07001-01004 | RING | 51000- | |
| 18 | 07002-11423 | O-RING | 51000- | |
| 19 | 723-26-15190 | PLUG | 51000- | |
| 20 | 07000-11007 | O-RING | 51000- | |
| 21 | 07001-01007 | RING,BACK-UP | 51000- | |
| 22 | 07000-11009 | O-RING | 51000- | |
| 23 | 07001-01009 | RING,BACK-UP | 51000- | |
| 24 | 708-8E-16160 | PLUG | 51000- | |
| 25 | 07002-11023 | O-RING | 51000- | |
| 26 | 07040-11409 | PLUG | 51000- | |
| 27 | 706-73-71450 | PLUG | 51000- | |
| 28 | 07002-11423 | O-RING | 51000- | |
| 29 | 723-50-11160 | STUD | 51000- | |
| 30 | 01643-31232 | WASHER | 51000- | |
| 31 | 01580-11210 | NUT | 51000- | |
| 32 | 01252-60850 | BOLT | 51000- | |
| 33 | 708-25-19160 | BOLT | 51000- | |
| 34 | 01252-60865 | BOLT | 51000- |