| Item | Part No. | Part Name | Qty | Serial No. |
| 581-40-53700 | VALVE ASS'Y | 1818- | ||
| 1 | \6\ | HOUSING | 1818- | |
| 2 | \6\ | SPOOL | 1818- | |
| 3 | \6\ | SPOOL | 1818- | |
| 4 | \6\ | SPOOL | 1818- | |
| 5 | \6\ | RING | 1818- | |
| 6 | \6\ | PIN | 1818- | |
| 7 | \6\ | VALVE | 1818- | |
| 8 | \6\ | PLUG | 1818- | |
| 9 | \6\ | PLATE,NAME | 1818- | |
| 10 | \6\ | SCREW,DRIVE | 1818- | |
| 11 | 581-40-54110 | SEAL KIT | 1818- | |
| 12 | 581-40-54120 | SEAL KIT | 1818- | |
| 13 | 581-40-54130 | O-RING | 1818- | |
| 14 | 581-40-54140 | VALVE ASS'Y | 1818- | |
| 15 | 581-40-54150 | BOLT | 1818- | |
| 16 | 581-40-54160 | WASHER | 1818- | |
| 17 | 581-40-54170 | BOLT | 1818- | |
| 18 | 581-40-54180 | WASHER | 1818- | |
| 19 | 581-40-54190 | COVER | 1818- | |
| 20 | 581-40-54210 | COVER | 1818- | |
| 21 | 581-40-54220 | VALVE ASS'Y | 1818- | |
| 22 | 581-40-54230 | PLUG | 1818- | |
| 23 | 581-40-54240 | VALVE ASS'Y | 1818- | |
| 24 | 581-40-54250 | STOPPER | 1818- | |
| 25 | 581-40-54260 | STOPPER | 1818- | |
| 26 | 581-40-54270 | GUIDE | 1818- | |
| 27 | 581-40-54280 | ORIFICE | 1818- | |
| 28 | 581-40-54290 | SPRING | 1818- | |
| 29 | 581-40-54310 | SPRING | 1818- | |
| 30 | 581-40-54320 | SPRING | 1818- | |
| 31 | 581-40-54330 | PLUG | 1818- | |
| 32 | 581-40-54340 | ORIFICE | 1818- | |
| 33 | 581-40-54350 | ORIFICE | 1818- | |
| 34 | 581-40-54360 | ORIFICE | 1818- | |
| 35 | 581-40-54370 | VALVE | 1818- | |
| 36 | 581-40-54380 | PLUG | 1818- | |
| 37 | 581-40-54390 | VALVE ASS'Y | 1818- | |
| 38 | 581-40-54410 | SPRING | 1818- | |
| 39 | 581-40-54420 | SPRING | 1818- |