| Item | Part No. | Part Name | Qty | Serial No. |
| YM729335-01612 | GEAR CASE ASS'Y | 18873- | ||
| 1 | \6\ | CASE,GEAR | 18873- | |
| 2 | YM124060-01050 | PLUG | 18873- | |
| 3 | YM121450-01560 | STUD | 18873- | |
| 4 | YM194990-22050 | NUT | 18873- | |
| 5 | YM22351-040010 | PIN,SPRING | 18873- | |
| 6 | YM121085-01890 | PLUG | 18873- | |
| 7 | YM121450-01550 | COVER | 18873- | |
| 8 | YM121450-01531 | PACKING (KIT) | 18873- | |
| 9 | YM26106-060102 | BOLT | 18873- | |
| 10 | YM24101-063050 | BEARING,BALL | 18873- | |
| 11 | YM26586-080102 | SCREW | 18873- | |
| 12 | YM121575-01510 | PACKING (KIT) | 18873- | |
| 13 | YM26106-080752 | BOLT | 18873- | |
| 14 | YM26106-080852 | BOLT | 18873- | |
| 15 | YM26106-081152 | BOLT | 18873- | |
| 16 | YM121450-01801 | SEAL, FRONT | 18873- | |
| 17 | YM129301-02801 | HOUSING | 18873- | |
| 18 | YM24101-062024 | BEARING,BALL | 18873- | |
| 19 | YM24341-000460 | O-RING | 18873- | |
| 20 | YM121456-91981 | BOLT | 18873- | |
| 21 | YM23414-080000 | GASKET | 18873- |