Service manual
Construction
and
Handling
Fuel System
• Fuel system
The fuel
systf;)m
schematic
is
shown in Fig. 1
with
the fuel
flowing
in
the
direction
indicated
by
the arrows.
To
bleed air
from
the system, loosen the vent plug
"A"
on the fuel
filter
and crank the engine
until
there are no more air bubbles
from
the vent. Tighten vent
"A"
and purge the air
from
the injec-
tion
pump
at vent
"8"
using the
same
procedures.
1.
Fuel tank
2. Fuel cock
3.
Fuel
filter
4.
Fuel injection
pump
5.
Injection pipe
6.
Nozzle holder
7.
Overflow
pipe
A:
Vent plug,
filter
8:
Vent plug,
pump
Fig.
1.
Fuel System
(3)
•
Fuel-filter
The fuel
filter
is
of
the cartridge
type
shown schematically in
Fig. 2. Under
normal
conditions
it
should
only
have
to
be
replaced every
400
hours.
To
install, apply a small amount
of
fuel
to
the pack ing and tighten securely
by
hand.
For
removal,
the
use
of
a
filter
wrench
15221-86611
is
recommended.
1.
2.
3.
4.
5.
6.
7.
(4J
(S)
Fuel
filter
Caver
Pipe coupling
Vent
plug
\~
"0"
ring
"0"
ring
I)'
Element
Fig.
2. Fuel
Filter
(1)
/
• Fuel
injection
timing
Fuel
in)rction
timing
is
adjusted
by
changing the number
of
shims
used
between the
pump
and the
gear
case
it
fits
into.
See
Fig. 3. One shim corresponds
to
approximately
1.5 degrees in
crank
angle. Therefore.
injection
will
take place 1.5 degrees
later when a shim
is
added
and
1.5 degrees earlier when a shim
is
removed. The
timing
is
correct when the
pointer
in the peer-
hole
on the side
of
the flywheel housing lines
up
with
the
"F1"
marked
on
the flywheel.
See
Fig. 4.
Fuel
injection
pump
Speed
control
lever
II~-
\
Control
rack
pin
Injection timing
adjust shims
Fig.
3.
Adjustment
of
Injection Timing
Fig.
4.
Inspection
of
Injection
Timing
..