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1 Safety Precautions when Working on Fuel Supply System WARNING When doing any assembly work, especially in the engine com‐ partment, pay attention to the following due to the limited space. ♦ Route all lines and wires in their original locations. lines, coolant and refrigerant lines, brake fluid lines and vacuum lines. ♦ Make sure that there is sufficient clearance to all moving or hot components. ♦ The fuel or fuel lines in fuel system can become very hot (danger of scalding)! ♦ In addition, the fuel system is under pressure! Before opening the system, place rags around the connection area and release pressure by carefully loosening the con‐ nection! ♦ Always wear protective eyewear, safety gloves and pro‐ tective clothing when performing any work on the fuel system to avoid eye injuries and burns. ♦ If fuel system components between the fuel tank and high pressure fuel pump were removed or replaced, the fuel system must be filled in order to bleed it. Refer to ⇒ “3.9 Fuel System, Filling/Bleeding”, page 328 . (Run‐ ning the high pressure fuel pump when dry must always be avoided). Always Pay Attention to the following When Removing and In‐ stalling the Fuel Level Sensor - G- or the Fuel Pump - G23- (Fuel Delivery Unit) From Full or Partially Filled Fuel Tanks. and place an extraction hose close to the fuel tank installation opening to extract fuel fumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a delivery volume greater than 15 m 3 /h can be used. ♦ Do not let fuel come in contact with skin. Wear fuel-resistant gloves. 1. Safety Precautions when Working on Fuel Supply System 223 |