3) When injection
pump
needs
to
be removed for adjustment
or
servicing,
try
to
learn how
to
set it right again, memorizing especially
in
what relation
the
match mark on injection pump flange
part
is
to
the mark on the flange plate.
(Refer
to
Fig. 3-22) Before
it
is
fixed again, never run the engine lest the
injection timing should go wrong.
For
removing, take
the
follwoing steps.
Loosen clamp bolts
that
fasten
pump
flange
to
engine crankcase with a socket
wrench fitted
on
the
end
of
universal joint. Then, unfasten cover from timing
gear case and separate injection
pump
gear from pump camshaft.
To
leave the
gear
in
mesh with idler in gear case
will
make the
pump
setting much easier
don't
c!isjoin
autotimer
from
the
gear, for easier operation
in
installment.
Having removed injection pump,
put
caps on delivery valve holders
to
keep off
dust.
4-5 Fuel injection timing
In this engine, injection
pump
starts injection
at
a fixed time, whatever the
injection rate may be. Model
40Q50
is
attached a mechanical autotimer
in
option,
which
is
coupled with injection
pump
gear, varies
the
injection starting time according
as
the
engine speed changes and thus provides always
the
fittest injection timing. This
injection pump
is
fastened by means
of
flange so
that
injection starting time can be
varied by changing its setting angle.
The
pump having been adjusted right
to
the
values
and firmly fixed
at
our
factory,
the
injection starting timing
will
never
to
wrong.
Fig.
3·21 Timing
mark
on
crank
shaft pulley
-
27-
Fig.
3·22
TIming mark
on
flywheel
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