| High pressure system pressure reduction. |
WARNING | The injection system is sub-divided into a high pressure system (max. approx. 120 bar) and a low pressure system (approx. 6 bar). |
| Before opening the high-pressure system, e.g. to remove the high-pressure pump, the fuel rail, the injectors, the fuel hoses or the fuel pressure sender -G247-, the fuel pressure in the high-pressure system must be reduced to approx. 6 bar. The procedure to do so is described below. |
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WARNING | The fuel line is under pressure! |
| Risk of injury to eyes and skin from fuel. |
| Wear safety goggles and protective clothing to avoid possible injury and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully loosening the connection. |
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| Place a clean cloth around the connection, and open it carefully to eliminate the residual pressure of approx. 6 bar overpressure. Any spilt fuel must be cleaned up. |
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| Once the work has been completed, consult the fault memory and erase all faults in memory due to disconnecting the connector. |
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