| . . | 2438U721F1 | [1] | BOOM | KOBASSY |
| 1. | 2438U721S1 | [1] | TUBE, CYLINDER | |
| 2. | 2438U721S2 | [2] | BUSHING | KOB |
| 3. | 2438U721S3 | [1] | PISTON-ROD | |
| 4. | 2438U716S2 | [1] | BUSHING | KOB |
| 5. | 2438U721S5 | [1] | CYLINDER HEAD | KOB |
| 6. | B38K0034S4 | [1] | BUSHING | KOB Superseded by part number: 2405U104D7040 |
| 7. | 2438U721S7 | [1] | SNAP RING | KOB |
| 8. | 2438U675S17 | [1] | LOCK | KOB |
| 9. | 2438U721S9 | [1] | PISTON | KOB |
| 10. | 2438U721S10 | [1] | SHIM | |
| 11. | 2438U721S11 | [1] | PIN | KOB |
| 12. | 2438U721S12 | [1] | RING, SNAP | RING, SNAP |
| 13. | 2438U721S13 | [1] | PLATE | |
| 14. | 2438U721S14 | [1] | SPRING | KOB |
| 15. | 2438U721S15 | [1] | VALVE SEAT | KOB |
| 16. | 2438U721S16 | [1] | RING | KOB |
| 17. | 2438U721S17 | [1] | BACK-UP RING | KOB |
| 18. | ZD12P11500 | [1] | O-RING | KOBID 114.60 ± 0.94 x OD 125mm |
| 19. | 2438U721S19 | [1] | BACK-UP RING | KOB Superseded by part number: ZD85P11500 |
| 20. | 2438U721S20 | [1] | RING | KOBBUFFER |
| 21. | ZD12G12500 | [1] | O-RING,124.40mm ID x 130.60mm OD x 3.10mm | KOBID 124.40 ± 1.01 x OD 130mm |
| 22. | ZD12P11000 | [1] | O-RING | KOB |
| 23. | 2438U721S23 | [2] | RING | KOBBACK-UP |
| 24. | 2438U675S20 | [1] | RING | KOBSEAL |
| 25. | 2438U721S25 | [2] | RING | KOB |
| 26. | 2438U721S26 | [2] | SEAL | KOBRING, WIPER |
| 27. | 2438U716S25 | [1] | SEAL | KOBRING , WIPER |
| . . | 2438U721R100 | [1] | REPAIR KIT | KOBCONSISTS OF REF 6 TO 8,10 & 15 TO 27 |
| . . | 2438U721R110 | [1] | REPAIR KIT CONSISTS OF REF 1 & 2 | REPAIR KIT CONSISTS OF REF 1 & 2 |
| . . | 2438U721R120 | [1] | REPAIR KIT CONSISTS OF REF 3 & 4 | REPAIR KIT CONSISTS OF REF 3 & 4 |
| . . | 2438U721R130 | [1] | REPAIR KIT | KOBCONSISTS OF REF 15 TO 23 |
| . . | 2438U721R140 | [1] | REPAIR KIT | KOBCONSISTS OF REF 24, 25 Superseded by part number: 2438U721R140P |