| 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 joints and connections and the surrounding areas before dismantling. |
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| Place removed parts on a clean surface and cover. Use only lint-free cloths. |
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| If repairs cannot be carried out immediately, carefully cover or seal open components. |
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| Install only clean parts: only remove replacement parts from packaging immediately prior to installation. Do not use any parts which have not been stored in their packaging (e.g. in a tool box). |
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| When the system is open: Do not work with compressed air. The vehicle should not be moved. |
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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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