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20Fuel Supply System
Edition 08.96
Safety precautions when carrying out work on fuel supply system
Important!
Fuel system is pressurised! Place cleaning ragsaround the connection point before opening the
system. Then, release pressure by carefullyloosening the connection point.
Pay attention to the following points when re- moving and installing the fuel gauge sender or the fuel pump (fuel delivery unit) from the fuel tank: Fuel tank should be not more than
2/3 full.
The extraction hose of an exhaust extraction system should be placed close to the assembly opening of the fuel tank and the extraction system switched on before commencing work in order to extract the fuel vapours which are released. If no exhaust extraction system is available, it is possible to use a radial fan with a delivery volume of more than 15 m
3/h (motor not
positioned in the air flow).
Avoid skin contact with fuel! Wear fuel- resistant gloves!
Rules for cleanliness
Pay careful attention to the following „5 rules“for cleanliness when carrying out work on the fuel supply/fuel injection system: Thoroughly clean connection points and the surrounding area before disconnecting.
Place removed parts down on a clean
surface and cover over. Do not use fluffing cloths!
Carefully cover over or seal opened com- ponents if repairs are not carried out imme-
diately.
Install only clean parts: Do not remove replacement parts from their wrapping until just before installing. Do not use parts which have been stored unwrapped (e.g. in tool boxes etc.).
If the system is open:
Avoid working with compressed air, if possible.
Avoid moving the vehicle, if possible.
