
Special tools are necessary for dismantling
or
assembling the crankshaft timing gear.The
camshaft timing
gear
can
be
got
out
by
two
bolts
M8
on
the
gear
spoke
which are turned
staggeringly and evenly.The timing idler is located
on
the
cylinder block by slide fit.The
injection
pump
timing gear is assembled
on
the
timing
gear
seat which is fixed on the camshaft
of
the injection
pump.Whenever
three bolts setting
the
injection
pump
gear
are
loosened,the
injection pump gear can be drawn out.The injection
pump
gear is pushed
out
when
the three
bolts
M8 X
35
are staggeringly tigbtened
on
the
gear
seat.
VB.Fuel
and
Governin2
System
.
The
fuel and governing system is the main operating section
of
the diesel engine . It is
composed
of
the fuel delivery pump, (uel filter, injection pump, governor, fuel injection and fuel
rrhe diesel fuel
IS
through the fuel filter.
delivered through the
inlection pipe under
high
~
pressure
produced
in
the pUlnp,
and
is then atonlized
5
4
2
1_~_--3
pump
injection
return
pipes,
etc.as
shown in Fig.IO.
'The
fuel
is
pumped
by
the fuel
delivery
pump
from
the fuel
tank
into the
COll1bustion chanlber.
by the injector before
burning
in
the
Fig.l0
Fuel
and
governing system
1. Fuel
return
pipe 2. Fuel injection pipe 3. Injector
4. Injection
pump
S.
Fuel filter 6. Governor 7. Fuel delivery pump
rrhe fuel delivery
ptunp
is a single-acting piston type pump located
on
the outside
of
the
injection pump.The
eccentric cam,which
is
set
on
the camshaft
of
injection
pump,dnves
the fuel delivery pump"
\vhich finally presses
the
fuel into the fuel cavity in
the
injection punlp.
5-7
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