O P E R A T I O N & M A I N T E N A N C E M A N U A L
27
3
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Adjustment of injector
The test and adjustment of oil injector shall be carried out on the test bench, with
its purpose to adjust the oil injection pressure, and observe the pulverization quality
and remove the errors.
When the oil injection pressure of the oil injector is too high or too low, injection
abnormal or parts are damaged, the diesel engine might have errors during operations
such as block smoke, power and rotation speed decreases, temperature discharge too
high or impact on the cylinder, etc. The judgment on oil injector with errors can adopt
stop-in-turn method, i.e. loosen the connection nuts between oil injector and high
presser oil pipe one by one to stop oil injection, and meanwhile observe the color of
The method for adjusting the advance angle for oil supply is
as following:
1, Remove the air inside the fuel system, and repeated
the rotating of crank to make the oil injection pump full of
fuel. Dismantle the high pressure oil pipe of the first cylinder,
and slowly turn the crank in positive directions, and pay
close attention to the oil surface inside the oil pipe joint hole.
When the oil surface waves, stop rotating the crank.
2, Check the scale that the finger marked on the crank
belt wheel according to the best angle in regulation.
3, If the advanced angle for oil supply is too large or too
small, loosen the 3 bolts that connect the high pressure oil
pump with the gear room and adjust by rotate the high
pressure oil pump,(as figure 2). From the front to the rear,
the oil injection pump will move clockwise, and the advanced
angle for oil supply gets smaller; move anticlockwise, the
advanced angle gets enlarger. During every rotate, it shall be
fasten 3 bolts and countercheck the advanced angle, till to
make the oil supply advanced angle according the
regulation.
Figure 2
adjustment of injection
timing
