| Item | Part No. | Part Name | Qty | Serial No. |
| (724-00-21003) | VALVE ASS'Y | 30001-31599 | ||
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1660-01A0 T0 Y1660-03A0. | ||||
| 1 | 724-00-31310 | BLOCK | 30001-31599 | |
| 724-00-33950 | SPOOL KIT,SERVICE | 30001-31599 | ||
| 2 | \6\ | BLOCK,SERVICE | 30001-31599 | |
| 3 | \6\ | SPOOL,SERVICE | 30001-31599 | |
| 724-00-34960 | SPOOL KIT,BOOM SWING | 30001-31599 | ||
| 4 | \6\ | BLOCK,BOOM SWING | 30001-31599 | |
| 5 | \6\ | SPOOL,BOOM SWING | 30001-31599 | |
| 724-00-41780 | SPOOL KIT,R.H. TRAVEL | 30001-31599 | ||
| 6 | \6\ | BLOCK,R.H. TRAVEL | 30001-31599 | |
| 7 | \6\ | SPOOL,R.H. TRAVEL | 30001-31599 | |
| 724-00-34970 | SPOOL KIT,BOOM | 30001-31599 | ||
| 8 | \6\ | BLOCK,BOOM | 30001-31599 | |
| 9 | \6\ | SPOOL,BOOM | 30001-31599 | |
| 724-00-34980 | SPOOL KIT,BUCKET | 30001-31599 | ||
| 10 | \6\ | BLOCK,BUCKET | 30001-31599 | |
| 11 | \6\ | SPOOL,BUCKET | 30001-31599 | |
| 12 | 724-00-31230 | BLOCK,CENTER | 30001-31599 | |
| 13 | 724-00-81510 | O-RING | 30001-31599 | |
| 14 | 07000-12011 | O-RING | 30001-31599 | |
| 15 | 724-00-79000 | VALVE ASS'Y,MAIN RELIEF | 30001-31599 | |
| 16 | (724-00-62000) | VALVE ASS'Y,SAFETY | 30001-31599 | |
| 17 | 724-00-31210 | PLATE | 30001-31599 | |
| 18 | 724-00-31260 | PISTON | 30001-31599 | |
| 19 | 724-00-31270 | TUBE | 30001-31599 | |
| 20 | 724-00-31710 | COVER | 30001-31599 | |
| 21 | 724-00-31720 | PLATE | 30001-31599 | |
| 22 | 724-00-31730 | RETAINER | 30001-31599 | |
| 23 | 724-00-31740 | BOLT | 30001-31599 | |
| 24 | 724-00-31750 | SPRING | 30001-31599 | |
| 25 | 01252-60510 | BOLT | 30001-31599 | |
| 26 | 01252-60540 | BOLT | 30001-31599 | |
| 27 | 724-00-31760 | SEAL,OIL | 30001-31599 | |
| 28 | 724-00-81110 | SLEEVE | 30001-31599 | |
| 29 | 724-00-81120 | SPRING | 30001-31599 | |
| 30 | 724-00-81130 | BALL | 30001-31599 | |
| 31 | 07002-11623 | O-RING | 30001-31599 | |
| 32 | 724-00-81210 | SLEEVE | 30001-31599 | |
| 33 | 724-00-81220 | SPRING | 30001-31599 | |
| 34 | 724-00-81230 | BALL | 30001-31599 | |
| 35 | 07002-11223 | O-RING | 30001-31599 | |
| 36 | 724-00-81320 | PLUG | 30001-31599 | |
| 37 | 07002-11423 | O-RING | 30001-31599 | |
| 38 | 724-00-51150 | O-RING | 30001-31599 | |
| 39 | 724-00-81330 | PLUG | 30001-31599 | |
| 40 | 07002-11623 | O-RING | 30001-31599 | |
| 41 | 724-00-81340 | PLUG | 30001-31599 | |
| 42 | 07002-11423 | O-RING | 30001-31599 |