| 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 connections 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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| Only install clean components: only remove replacement parts from packaging immediately prior to installation. 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 use compressed air. Do not move vehicle. |
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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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