Engine JAC HFC4DA1-2C. Manual - part 1

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.   

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines 

 

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3. Tighten the water level sensor and plug the water level sensor connector.   

II. Engine Oil   

HFC4DA1-2C diesel engine shall use the diesel engine oil with the quality grade at API CH-4 or above, of which the 
viscosity is related to the environment temperature. When the environment temperature is reduced, the viscosity of the 
engine oil is increased to increase the start resistance so that the diesel engine can’t reach the start speed and cause 
difficult start. Therefore, in different seasons and regions, choose the correct engine oil with different viscosity grade 
under different environment temperature, in accordance with the table below. 

 

Environment 

temperature 

-15℃~40℃ -20℃~30℃ 

-30℃~25℃ 

Extreme cold region 

Engine oil 

trademark  

10W-40/50 or 15W-40 

10W-30/40/50 

5W-40/50 

0W-40/50 

Check engine oil level:   

z  Stop the engine and wait for several minutes;   

z  Pull out the engine oil dipstick;   

z  Wipe the oil dipstick with clean cloth and re-insert the oil dipstick to the end;   

z  Pull out the oil dipstick again and observe the engine oil level. Check whether the oil level is between the upper 

and lower limits of the oil dipstick. If insufficient, add the engine oil.   

 

Notice!  

z  Make sure to periodically check the engine oil level.   

z  The apparatus used for refueling shall be clean.   

z  In event of sudden rise or drop of engine oil level, check for cause immediately.   

Upper limit

Lower limit

Notice: Make sure to horizontally park the vehicle while
measuring the engine oil level. Stop the engine and wait
for several minutes, till the engine oil can return to the oil
sump. 

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines 

 

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z  Never mix different trademarks of engine oils.   

z  Periodically replace the engine oil as per the maintenance regulations.   

III. Coolant   

Make sure to use clean automotive antifreeze coolant featuring antifreeze in winter, anti-boiling in summer, and 
anti-corrosion, anti-rusting, and anti-scaling. 

 

Take cautions during the operation:   

a. Always use coolant throughout the year and pay attention to the use continuity of the coolant.   

b. Depending on the temperature of the region in which the vehicle is used, choose the coolant with different freezing 
point. The freezing point of the coolant shall be at least 10ºC below the lowest temperature of the region, in order to 
maintain the antifreeze function.   

c. Purchase the qualified coolant product, in order to prevent damaging the engine and causing unnecessary economic 
losses due to use of disqualified product.   

d. Never mix different trademarks of coolants nor use such mixed coolant, in order to prevent the chemical reaction 
from impairing the respective comprehensive anti-corrosion performance.   

e. Never add the hard water such as well water or running water. Upon the detection of suspended material, sediment, 
or smelliness phenomenon in the coolant, it indicates that the coolant is deteriorated and becomes ineffective due to 
chemical reaction. In such case, timely clean the cooling system and thoroughly replace the coolant.     

f. The glycol coolant is one toxic substance and is harmful to the liver. Never swallow the coolant. In event of skin 
exposure to the coolant, thoroughly clean with water immediately. In addition, the nitrite anti-corrosion additive in the 
coolant is one carcinogenic substance. Do not dispose the used coolant randomly, in order to prevent contaminating 
the environment.

   

Notice!  

z  Upon the detection of sudden drop in coolant level, check for cause immediately.   

z  The cooling system is under pressurized state! Never open the cap of the coolant compensation tank or radiator 

while the engine is still hot, or it will lead to scalding danger!   

 

 

 

 

 

 

 

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines 

 

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Section II Main Technical Specification of Engine   

Model HFC4DA1-2C 

Type 

Inline 4-cylinder, longitudinal layout, water-cooled, 4-stroke, turbocharged 

inter-cooler, high pressure common rail, and direct injection engine   

Nominal power/speed 

85/3600（kw/rpm） 

Top torque/speed 

250/1800～2800(Nm/rpm) 

Minimum fuel consumption 

of external characteristic   

≤ 218g/kw·h 

Top idling speed 

4000rpm 

Exhaust temperature (before 

turbine)  

≤ 700℃ 

Idling speed 

800±50 rpm 

Number of cylinders × bore 

× stroke:   

4×93 mm×102 mm 

Total piston 

displacement 

2.771 L 

Compression ratio 

17  ：1 

Fuel grade 

-10# 

Working sequence 

1-3-4-2 

Fuel supply advance 

angle 

Electronically controlled 

Flameout mode   

Fuel cut-off 

Engine mass 

270kg 

Emission limit (test value)   

China-IV emission standard 

compliant  

Noise limit 

≤ 95dB(A) 

Engine oil trademark   

Above grade CH-4 

Engine oil capacity 

7.2L 

Engine oil/fuel consumption ratio (24h at full speed)   

≤ 0.10% 

Temperature of engine oil in oil sump (under nominal working 

condition)  

≤130℃ 

Engine oil pressure 

Idling: ≥98 kPa 

Coolant capacity 

30L 

Applicable altitude 

≤3500m 

Thermostat type 

Wax type 

Maximum outlet temperature of 

coolant 

≤ 110℃ 

Thermostat opening 

temperature 

82℃ 

Thermostat full open temperature 

95℃ 

Applicable temperature 

of diesel engine 

With heated cold starter and with heater plug in engine 

Overall dimensions (L×W×H)   728.9mm×715.6mm×753.3mm 

Length of cylinder 

block 

479mm