| Item | Part No. | Part Name | Qty | Serial No. |
| 01 | 255 010 40 | One-way restrictor NG 40 assy. | ||
| 02 | Housing These parts are not sold seperately | |||
| 03 | Throttle pin These parts are not sold seperately | |||
| 04 | 255 011 40 | Cone | ||
| 05 | 994 130 | Screw plug | ||
| 06 | 255 013 40 | Screw plug | ||
| 07 | 753 892 | Nut | ||
| 08 | 255 012 40 | Spring | ||
| 09 | 006 729 98 | O-ring | ||
| 10 | 082 616 40 | O-ring | ||
| 11 | 980 561 | O-ring | ||
| 12 | 972 047 | O-ring | ||
| 13 | 994 297 | Support ring | ||
| 994 299 | Seal kit fig-nos: 09-13 |