QUANCHAI N485D, Руководство по обслуживанию

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ANHUI QUANCHAI ENGINE CO., LTD
5. Checks on fuel system
In the fuel system, the fuel flows through from the fuel tank to the diesel filter and the pipeline, then is sent to
the high-pressure fuel pump by the fuel supply pump, and is pumped out by the high-pressure pump; and then
it runs through the high-pressure fuel pipe and is injected into the cylinder by the fuel injector (with pressure
of 21-23 MPa) for compression combustion. Excess fuel flows back into the fuel tank through the fuel return
pipe of the fuel injector. As the fuel pump, the high-pressure fuel pipe and the fuel injector are under very
high fuel pressure, do not loosen any pipe joint when the engine is running; otherwise, personal injury and
property damage may occur. The pipe joint of the high-pressure fuel system shall only be loosened until the
engine is shut down for at least 10 min and the fuel pressure decreases as a result. Connect the pressure gauge
to measure and check the fuel pressure.