| Item | Part No. | Part Name | Qty | Serial No. |
| (6643-21-1016) | CYLINDER BLOCK A. | | 174424- |
| (6643-21-1026) | CYLINDER BLOCK A. | | 174424- |
| 1 | 6610-29-1210 | CAP,MAIN METAL¤ NO.1¤3¤5 | | 174424- |
| \5\6610-21-1210 | CAP,MAIN METAL¤ NO.1¤3¤5 | | 174424- |
| 2 | 6610-29-1220 | CAP,MAIN METAL¤ NO.2¤4¤6 | | 174424- |
| \5\6610-21-1220 | CAP,MAIN METAL¤ NO.2¤4¤6 | | 174424- |
| 3 | 6610-29-1231 | CAP,MAIN METAL¤ NO.7 | | 174424- |
| \5\6610-21-1231 | CAP,MAIN METAL¤ NO.7 | | 174424- |
| 4 | 6610-21-1730 | RING,DOWEL | | 174424- |
| 5 | 6610-21-1710 | BOLT | | 174424- |
| 6 | 6610-21-1720 | WASHER,LOCK (K2) | | 174424- |
| 7 | 6610-21-1270 | PIN,DOWEL¤ MAIN METAL CAP | | 174424- |
| 6610-29-1270 | PIN,DOWEL (SERVICE PARTS) (OS) | | 174424- |
| 8 | 6631-21-6720 | COVER,WATER HEADER | | 174424- |
| 9 | 6693-22-6710 | COVER,WATER HEADER | | 174424- |
| 10 | 6610-21-6720 | GASKET (K2) | | 174424- |
| 11 | 02010-20419 | BOLT | | 174424- |
| 12 | 02310-10916 | WASHER,SPRING | | 174424- |
| 13 | 02720-20607 | PLUG | | 174424- |
| 14 | 6610-21-4570 | PIN,DOWEL¤ FLYWHEEL HOUSING | | 174424- |
| 15 | 6610-21-2770 | PIN,STOPPER | | 174424- |
| 16 | 6710-21-6130 | PLUG,EXPANSION | | 174424- |
| 17 | 02720-20607 | PLUG,WATER HEADER | | 174424- |
| 18 | 02720-21214 | PLUG | | 174424- |
| 19 | 02720-20810 | PLUG | | 174424- |
| 20 | 02720-20607 | PLUG | | 174424- |
| 21 | 6710-21-1260 | PLUG,WATER HEADER | | 174424- |
| 22 | 6691-22-6760 | COVER,HAND HOLE | | 174424- |
| 22B | 02720-20607 | PLUG,COVER | | 174424- |
| 23 | 6623-21-6770 | GASKET (K2) | | 174424- |
| 24 | 02010-70625 | BOLT | | 174424- |
| 25 | 02310-11224 | WASHER,SPRING | | 174424- |
