| When working on the fuel supply/injection system, pay careful attention to the following “5 rules”: |
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| Thoroughly clean all unions/connections and adjacent areas before disconnecting. |
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| Place parts that have been removed on a clean surface and cover. Do not use fluffy cloths (use lint-free cloths only)! |
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| Carefully cover opened components or seal, if the repair cannot be carried out immediately. |
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| Install clean components only: Only unpack replacement parts immediately prior to installation. Do not use parts which have been stored loose (e.g. in tool boxes etc.). |
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| When the system is open: Do not work with compressed air if this can be avoided. Do not move vehicle unless absolutely necessarily. |
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