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
26
Section 4 Engine adjustment
1
、
Adjustment of valve lash
2
、
Adjustment of injection timing
In order to obtain the most economic fuel consumption rate and good operation
functions of the diesel engine, the advanced for oil supply shall be adjusted properly. The
adjusted value of the advanced angle for oil supply must comply with the requirements of
technical parameters of the diesel engine.
When carrying repair or technical maintenance to
the diesel engine, it necessary to check the
clearance between the air valves. The adjustment
method for clearance between the air valves and the
distribution structure is as follows(Please refer to the
figure):
1, Dismantle the cylinder cover, check and fasten
the bolt on the air valve rocker shaft stand.
2 Turn the crank to the first cylinder piston stop
position, when the “O” scale on the crank belt wheel
aims exactly with the indicator in the timing gear cover.
3, Insert the thick and thin dividers respectively into
the air and exhaust valves of the first cylinder and the
rocker, check and adjust the clearance between the air
valves and keep the cool clearance between within
regulated valve. After that, according to the cylinder
working order 1-3-4-2 to rotate the crank(i.e. 1800),and
adjust
Figure 1
adjustment of valve lash
