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There'is a thrust
flan~e
at the front end of camshaft,and a thrust plate of camshaft is located
at the front end to control the camshaft axial
movin~.
The lube oil is delivered to the camshaft
1
bushings separately through the main oil line.Before assembling the front bushing of camshaft,
check whether the
oil
holes on the bushing and oil
passa~e
in
the cylinder block communicate
with
each other. As the camshaft gear is engaged with the driven gear
o·~.the
oil pump.Jheretore,
before dismantlinJ;t the camshaft,it is necessary to disassemble the lube oil pump,then dra\v the
camshaft out from the front end.
'fhe axis of the tappet deviates from the center
line
of cam width .During operating,the
tappet rotates so as to provide an even wearing on the bottom surface and the cylindrical surface
of tappet.
VI •
Gear Transmission Svstem
The gear transmission system consists of the crankshaft timing gear.,timing idler,camshaft
timing gear,injection pump timing gear and hydraulic pump gear.
Except the hydraulic pump gear.,all the timing gears are all marked with timing sifms which.,
when assembling,should align wtih each other at the lneshing position (the single -tooth marked
with a sign is inlaid between the two adjacent marked teeth)in order to ensure the movement
relationship of all
movin~ pa~s"as
shown in Fig.9.
Fig. 9 Timing gear meshing signs
5-6
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