| Item | Part No. | Part Name | Qty | Serial No. |
| UC4100637779 | COVER | 1801- | ||
| 1 | (UC4720163881) | RELIEF VALVE,(SEE FIG. Y1610-05A0A) | 1801- | |
| 2 | (UC4704346369) | RELIEF VALVE,(SEE FIG. Y1610-05A0A) | 1801- | |
| 3 | \6\ | COVER | 1801- | |
| 4 | UC1301755004 | BOLT | 1801- | |
| 5 | UC1100500982 | PIN | 1801- | |
| 6 | UC1303035375 | O-RING | 1801- | |
| 7 | \6\ | PLUG | 1801- | |
| 8 | UC1300030001 | O-RING | 1801- | |
| 9 | \6\ | BUSHING | 1801- | |
| 10 | \6\ | METAL | 1801- | |
| 11 | UC1100627032 | CASE | 1801- | |
| 12 | UC1302330009 | RING | 1801- | |
| 13 | UC1301037003 | O-RING | 1801- |