Clean Working Conditions

Even a little contamination can lead to faults. Observe the following guidelines for cleanliness when working on the fuel system, injection system and turbocharger:

• Before loosening, connections and surrounding areas must be cleaned thoroughly with engine or brake cleaner, and then cleaned area must be dried completely.
• When disassembling, always cover any open connections immediately with clean caps.
• Remove the caps from any components just before installing the component. Keep the parts that are going to be used in a new, sealable plastic bag.
• Place removed parts on a clean surface and cover them with lint-free cloths.
• Carefully cover or plug unpacked components if repairs cannot be performed immediately.
• Install only clean parts: remove the replacement parts from their packaging just before installing them. Do not use parts that have been stored loose (for example in tool boxes).
• If system is open, do not work with compressed air and do not move the vehicle.
• Make sure no fuel gets onto the fuel hoses. If necessary, wipe off the fuel hoses immediately.
• In addition, do not let diesel fuel flow onto coolant hoses. If necessary, the hoses must be cleaned again immediately. Replace corroded hoses.
• Protect the disconnected connectors from dirt and moisture and only connect when they are dry.