| When working on the fuel supply and injection system, pay careful attention to the following “5 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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| Only install clean components: Replacement parts should only be unpacked 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 system is open: do not work with compressed air if this can be avoided. Do not move the vehicle unless absolutely necessary. |
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