| Item | Part No. | Part Name | Qty | Serial No. |
| 6731-21-1130 | CYLINDER BLOCK ASSEMBLY | 21668420- | ||
| 1 | \6\ | BLOCK ASSEMBLY | 21668420- | |
| 2 | 6732-21-1910 | RING | 21668420- | |
| 3 | 6732-21-1810 | PLUG | 21668420- | |
| 4 | 6732-21-1210 | CAP | 21668420- | |
| 5 | 6732-21-1820 | PLUG | 21668420- | |
| 6 | 6735-21-5530 | PLUG | 21668420- | |
| 7 | 6736-21-1810 | PLUG | 21668420- | |
| 8 | 6732-21-1611 | BOLT | 21668420- | |
| 9 | 6732-21-1411 | BUSHING | 21668420- | |
| 6731-21-1220 | BLOCK SERVICE KIT | 21668420- | ||
| 10 | 6732-11-1910 | PLUG | 21668420- | |
| 11 | 6732-11-1920 | PLUG | 21668420- | |
| 6732-21-1960 | PLUG ASSEMBLY | 21668420- | ||
| 12 | \6\ | PLUG | 21668420- | |
| 13 | 6215-81-9710 | O-RING | 21668420- | |
| 14 | 6732-21-6120 | PIN | 21668420- | |
| 15 | 6732-21-6130 | PLUG | 21668420- | |
| 16 | 6732-21-6140 | RING | 21668420- | |
| 17 | 6732-21-1930 | O-RING | 21668420- | |
| 18 | 6731-21-1190 | NOZZLE | 21668420- | |
| 19 | 6732-21-6160 | PLUG | 21668420- | |
| 20 | 6736-29-2110 | LINER | 21668420- |