| Item | Part No. | Part Name | Qty | Serial No. |
| 6154-21-1200 | CYLINDER BLOCK ASS'Y | 310521- | ||
| 1 | \6\ | BLOCK,CYLINDER | 310521- | |
| 2 | 6150-21-1490 | BUSHING,CAMSHAFT | 310521- | |
| 3 | \5\6150-29-1210 | CAP,MAIN METAL¤ NO.1¤2¤3¤4¤5¤6 | 310521- | |
| 4 | \5\6150-29-1250 | CAP,MAIN METAL¤ NO.7 | 310521- | |
| 5 | 04020-00514 | PIN,DOWEL | 310521- | |
| 6 | 6150-21-1710 | BOLT | 310521- | |
| 7 | 01643-31645 | WASHER | 310521- | |
| 8 | 07043-50108 | PLUG | 310521- | |
| 9 | 07043-50211 | PLUG | 310521- | |
| 10 | 07043-50617 | PLUG | 310521- | |
| 11 | 07040-12414 | PLUG | 310521- | |
| 12 | 07040-13016 | PLUG | 310521- | |
| 13 | 07002-23034 | O-RING (K2) | 310521- | |
| 14 | 07002-22434 | O-RING (K2) | 310521- | |
| 15 | 07046-43016 | PLUG | 310521- | |
| 16 | 07046-44016 | PLUG | 310521- | |
| 17 | 6154-21-1981 | PLUG | 310521- | |
| 18 | 07000-72022 | O-RING | 310521- | |
| 19 | 07046-21210 | PLUG | 310521- | |
| 20 | 07046-43516 | PLUG | 310521- | |
| 21 | 04020-00820 | PIN,DOWEL | 310521- | |
| 22 | 6150-21-1170 | TUBE | 310521- | |
| 23 | 6150-41-2430 | PIN | 310521- | |
| 24 | 6150-41-2440 | PIN | 310521- | |
| 25 | 04025-00408 | PIN,SPRING | 310521- | |
| 26 | 6150-21-4770 | PIN,DOWEL | 310521- | |
| 27 | 6150-41-2430 | PIN | 310521- | |
| 28 | 04020-01024 | PIN,DOWEL | 310521- | |
| 29 | 04025-00512 | PIN,SPRING | 310521- | |
| 30 | 6154-21-2220 | LINER,CYLINDER | 310521- | |
| 31 | 6150-21-2230 | O-RING,LOWER (K2) | 310521- | |
| 32 | 6150-21-2240 | O-RING,CENTER (K2) | 310521- | |
| 33 | 6150-21-2250 | SEAL,CREVICE (K2) | 310521- | |
| 34 | 6154-21-1810 | NOZZLE,PISTON COOLING | 310521- | |
| 35 | 01435-00816 | BOLT | 310521- |