Service manual
FUEL
INJECTORS
DISASSEMBLING
AND
INSPECTING
1.
Oamp
the nozzle holder in a vise, then remove the
cap nut.
2. Remove the pressure adjusting screw, then pull out the
upper seat, spring and the push rod.
3. Clamp the nozzle holder in a vise, remove the nozzle nut
then pull the nozzle out.
4. Clean the disassembled parts with clean diesel fuel, then
remove the carbon adhering on the nozzle.
NOTE:
Do
not
use
a
metal
tool
to
remove
the carbon.
5. After cleaning, check to see
if
the needle valve comes
down into the valve seat by its own weight when setting
the nozzle body upright position and inserting needle
valve.
6. Check that there is no flaw
or
other damage
on
mating
surfaces and sliding surfaces
of
the nozzle body and the
needle valve and,
if
present, replace the nozzle assembly.
BODY
SUB
ASSEMBLY
v:::.
.---SPRING
~
PIN
I
~DISTANCE
I
PIECE
.__NOZZLE
B.
ASSEMBLY
RETAINING
NUT
Inspect
tor
wear.
deformation
and
breaks.
I
Check
assembly
for
smooth
sliding
while
immersed
in
kerosene.
FUEL
INJECTOR
TORQUE
WRENCH
NOTE:
For testing the injectors, refer to the following page.
INSTALLING
Install the nozzle and nozzle holder assembly in the reverse
order
of
removal. When installing the nozzle and nozzle
holder assembly, use a new copper washer.
ASSEMBLING
Assemble in the reverse order
of
disassembly, noting the
fol-
lowing points:
1. To assemble the nozzle and nozzle holder, first assemble
the pressure adjusting nut side, and temporarily tighten
the
nut
Mount the nozzle and set the needle valve to
proper position, then mount the nozzle nut.
2. After the nozzle and nozzle holder have been assembled,
check the injection starting pressure and spray condition.
Torque
18-
22n-1bs
(2.5-
3.Dkg-cm)
Torque
36.2-
43.4n-lbs
-i-
(5.0ยท6
........
}10Cyfimlerllnd
Torque
Fuel
Pipe
Connections
Torque
18-
22n-1bs
(2.5-
3.Dkg-cm)
FUEL
LIFT
PUMPS
There is no maintenance required for the solid state fuel lift
pump. This pump
is
activated during the start sequence when
preheat is pressed. A distinct ticking can be heard when the
pump is operating.
If
no ticking is heard, check the electrical
connections.
If
the pump has failed, replace it.
Some early model engines and those engines equipped with
24 volt systems are equipped with a fuel lift pump which
uses a replaceable filter. At overhaul, replace the filter and
clean the pump exterior and the electrical connections. This
pump, when operating properly, will also make a distinct
ticking noise.
FUEL
LIFT
PUMP
28
SOLID
STATE
FUEL
LIFT
PUMP