| S/N start | S/N end | Variant |
| 310001 | None | 3333651 |
333.100.
Pre-heater
15185569, 17481129, 17479201
`
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Parts on group Pre-heater:
| Pos. | Part No | Qty | Parts name | Comments |
|---|---|---|---|---|
| VOE21933716 | [1] | Starter element | HE2501 | |
| 1. | VOE21933380 | [1] | Intermediate housing | |
| 2. | VOE21933653 | [1] | Heater | |
| 3. | VOE477268 | [4] | Insulating plate | |
| 4. | VOE477113 | [2] | Insulating plate | |
| 5. | VOE21980343 | [2] | Guide sleeve | |
| 6. | VOE21955036 | [2] | Stud | |
| 7. | VOE192288 | [2] | Washer | |
| 8. | VOE21746768 | [6] | Guide sleeve | |
| 9. | VOE996606 | [12] | Six point socket screw | |
| 10. | VOE191156 | [12] | Washer | |
| 11. | VOE20942283 | [6] | Sleeve | |
| 12. | VOE944123 | [2] | O-ring |