| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | YM124085-35300 | VALVE | 18873- | |
| 2 | \6\ | BALL,STEEL | 18873- | |
| 3 | \6\ | SPRING | 18873- | |
| 4 | \6\ | SHIM | 18873- | |
| 5 | \6\ | SEAT | 18873- | |
| 6 | YM124085-35350 | NUT | 18873- | |
| 7 | YM171056-35110 | OIL FILTER ASS'Y | 18873- | |
| 8 | YM124450-35110 | O-RING | 18873- | |
| 9 | YM171056-35120 | PLATE¤ CAUTION | 18873- |