Installation Instructions
1
ENGINE
(5) Injection Nozzle
C140F002
(6) Governor
0087F027
B1700·B21 00·B2400 WSM, 11770
This
nozzle
is
of
flat-cut-provided double
throttle
type.
This
type
of
nozzle
is
designed
to
control the
injection quantity when the
lift
rate
is
low
at start
of
the injection quantity when the
lift
rate
is
low
at
start
of
the
injection,
and
to
cut
down
on
the
knocking sound
caused
by
excessive
fuel injection
by
giving the needle valve section more taper
than
before
to
prevent the rapid increase in the injection
quantity when the initial injection turns
into
the full-
force injection.
Also, employed
to
prevent the injection quantity
loss
in the
throttle
section
caused
by
carbon, the
flat
cut provided at the needle valve section helps
the
throttle
withstand long
use
and reduce
as
much
knocking sound
as
when
it
was
new.
The
heat
seal
is
employed
to
improve
the
durability and reliability
ofthe
nozzle.
The
injection
pressure
is
13.73
to
14.71
MPa
(140
to
150
kgf/cm
2
,
1991
to
2133
psi),
and
is
adjusted
with
adjusting washers
(2).
(1
)
Bar Filter
(6)
Retaining
Nut
(2)
Nozzle Holder Body
(7)
Nozzle Body
(3)
Adjusting Washer
(8)
Needle Valve
(4)
Nozzle Spring
(9)
Heat
Seal
(5)
Push
Rod
(10)
Packing
This mechanism
maintains
engine
speed
at
a
constant level
even
under fluctuating loads, provides
stable idling and regulates maximum engine
speed
by
controlling the fuel injection rate.
This engine
uses
a mechanical
governor
that
controls the fuel injection rate
at
all speed ranges
(from idling
to
maximum speed) by
utilizing
the
balance between the flyweight's centrifugal force
and
spring tension.
A governor shaft
for
monitoring engine
speed
is
independent
ofthe
injection pump shaft and rotates
at twice the
speed
of
conventional types, providing
better
response
to
load fluctuation and delivering
greater engine output.
(1) Start Spring
(2) Governor Spring 1
(3) Governor Spring 2
(4) Fork Lever 1
(5) Fork Lever 2
(6) Fork Lever Shaft
(7) Flyweight
(8) Torque Spring
(9) Governor Shaft
(10) Governor Sleeve
1-M16