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Safety precautions when working on fuel supply system WARNING When doing any repair work, especially in the engine compart‐ ment, pay attention to the following due to the cramped condi‐ tions: ♦ Route all the various lines (e.g. for fuel, hydraulics, acti‐ vated charcoal filter system, coolant, refrigerant, brake fluid and vacuum) and electrical wiring in their original po‐ sitions. ♦ Ensure that there is sufficient clearance to all moving or hot components. ♦ The fuel and the fuel lines in the fuel system can become very hot (danger of scalding)! ♦ The fuel system is also under pressure! Before opening the system, place cloths around the connections. Then carefully loosen connection to release the pressure! ♦ Wear eye and hand protection when performing any type of repair work on the fuel system! When removing and installing fuel gauge sender or fuel pump (fuel delivery unit) from a full or partly full fuel tank, observe the following: sender opening in fuel tank to extract escaping fuel fumes and switch on exhaust extraction system. If no exhaust gas ex‐ traction system is available, a radial fan with a displacement greater than 15 m 3 /h can be used providing that motor is not in air flow. ♦ Prevent skin contact with fuel! Wear fuel-resistant gloves! 4-cylinder diesel engine (1.9 l engine) - Edition 01.2009 114 Rep. Gr.20 - Fuel supply system
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