Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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Chapter I Technical Characteristics of Engine
Section I Technical Requirements for Fuel, Oils, and Auxiliary Materials
I. Diesel
HFC4DA1-2C diesel engine adopts electronically controlled, high pressure common rail, fuel injection system and
conforms to Euro-IV emission regulation and thus extends higher requirements over the fuel. To guarantee the
reliability of the fuel supply system, make sure to use the qualified clean diesel produced by national well-established
fuel company, in order to prevent the blockage or early wear of fuel injector due to poor fuel.
Add the fuel only at the well-established gas station. The use of poor diesel or other diesel intended for
other than vehicle engine application is strictly prohibited.
Make sure to use the fuel conforming to national standard GB 19147. The grade number of the diesel chosen is related
to the temperature of working environment. When the environment temperature is reduced, the paraffins within the
diesel will precipitate to block the fuel pipeline, leading to difficult fuel supply and start failure of the engine.
Therefore, choose different grade number of diesel depending on the environment temperature in different seasons
and regions, in accordance with the table shown below.
Environment temperature
Above 5℃ Above -5℃ Above -10℃ Above -25℃
Recommended grade
number of diesel
0# light diesel -10# light diesel -20# light diesel -35# light diesel
Notice!
The cam of the high pressure fuel pump is being lubricated by the fuel. Never cause engine flameout due to depletion
of fuel in the fuel tank, or it will lead to serious wear of the high pressure fuel pump. After adding new fuel, make sure
to firstly use manual fuel pump to bleed the air from the fuel pipe and high pressure fuel pump and thoroughly fill the
fuel pipe and high pressure fuel pump with fuel before starting the engine, in order to prevent the wear of high
pressure fuel pump due to fuel shortage.
Procedure for air bleeding and refueling:
1. Loosen the air bleeding screw;
2. Push down the manual fuel pump with hand and then release. Repeat above operation, till there is no air bleeding
out from the air bleeding screw;
3. Tighten the air bleeding screw and pump the fuel with manual fuel pump, till the fuel injection pump is thoroughly
filled with fuel.
The diesel filter embodies the fuel-water separation function:
The water content in the diesel will bring about great harm to the fuel system. Upon the detection that the diesel filter
water level warning lamp on the instrument panel lights up, it indicates the presence of waste water in the diesel filter.
The waste water shall be drained timely, or it will lead to the rusting and wear of high pressure fuel pump, high
pressure fuel rail, and fuel injector and bring about unnecessary losses.
Procedure for water drainage:
1. Unplug the water level sensor connector;
2. Loosen the water level sensor to drain the waste water, till the diesel flows out.
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