| When working on the fuel supply and injection system, pay careful attention to the following „6 rules“ for cleanliness: |
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| Thoroughly clean all unions and surrounding areas before disconnecting. |
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| Place removed parts on a clean surface and cover. Use only lint-free cloths. |
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| Carefully cover opened components or seal if repairs cannot be carried out immediately. |
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| Install clean components only. Do not remove replacement parts from packing until immediately before installing. Do not use parts that have not been stored in their packing (e.g. in tool boxes etc.). |
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| When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely necessary. |
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| Also ensure that no diesel fuel comes into contact with the coolant hoses. Should this occur, the hoses must be cleaned immediately. Damaged hoses must be renewed. |
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