| When working on fuel supply and injection system, pay careful attention to the following rules for cleanliness: |
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| Thoroughly clean all unions and adjacent areas before disconnecting. |
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| Place removed parts on a clean surface and cover. Do not use fluffy 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 system is open: Do not work with compressed air if this can be avoided. Do not move vehicle unless absolutely necessary. |
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| Also ensure that no diesel fuel runs on to the coolant hoses. If necessary hoses must be cleaned immediately. Contaminated hoses must be replaced. |
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