| Item | Part No. | Part Name | Qty | Serial No. |
| 6731-11-1370 | HEAD ASSEMBLY | 21494941- | ||
| 1 | \6\ | HEAD | 21494941- | |
| 2 | 6736-11-1150 | PLUG | 21494941- | |
| 3 | 6732-11-1170 | INSERT, EXHAUST | 21494941- | |
| 4 | 6732-11-1180 | INSERT, INTAKE | 21494941- | |
| 5 | 6732-11-1910 | PLUG | 21494941- | |
| 6 | 6732-11-1920 | PLUG | 21494941- | |
| 7 | 6732-11-1930 | PLUG | 21494941- | |
| 8 | 6732-41-4540 | SEAL | 21494941- | |
| 6736-41-4110 | INTAKE VALVE ASSEMBLY | 21494941- | ||
| 9 | \6\ | VALVE | 21494941- | |
| 10 | 6732-41-4520 | COTTER | 21494941- | |
| 6736-41-4210 | EXHAUST VALVE ASSEMBLY | 21494941- | ||
| 11 | \6\ | VALVE | 21494941- | |
| 12 | 6732-41-4520 | COTTER | 21494941- | |
| 13 | 6732-41-4430 | SPRING | 21494941- | |
| 14 | 6731-41-4510 | RETAINER | 21494941- | |
| 15 | 6732-11-1610 | BOLT | 21494941- | |
| 16 | 6732-11-1620 | BOLT | 21494941- | |
| 17 | 6735-11-1821 | GASKET | 21494941- | |
| REFER TO FIG. NOS. OF REPAIR PARTS FOR O.S., U.S., AND SERVICE PARTS. |