Chapter 3 Fuel Injection Equipment
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_______________________
3,4JH3(B)(C)E
(4) Clean the nozzle seat with cleaning spray.
(5) Clean off the carbon
on
the tip of nozzle with a piece of
wood.
(6) Clean hole type nozzles with a nozzle cleaning needle.
Nozzle
deaning
needle
(piano
wire)
0.2
mm
dia.
wire,
22mm
long.XS
wires
---'--ii
cQi
Part
code
no.
6-3.2 Nozzle inspection
(1) Inspect for scratches/wear
2821 0-00001 0
Inspect oil seals for abnormal scratches or wear and
replace the nozzle if the nozzle sliding surface or seat
are scratched or abnormally
worn.
(2) Check nozzle sliding
Wash the nozzle and nozzle body
in
clean diesel oil,
and make sure that when the nozzle is pulled out
about half way from the body, it slides down by itself
when released.
Rotate Irie nozzle a little; replace the nozzle/nozzle
body as a set ii there are some places where
it
does
not slide smoothly
(3) Inspecting stop plate (inter-piece)
Check for scratches/wear
in
seals
on
both ends. check
for abnormal wear on the surface where it comes
in
contact with the nozzle; replace if the stop plate is
excessively worn.
3-34
Nozzle
contact
surfa~e
Pin
<->
' (J
I
Sealsurtace
:
Hoie
type
mm
Nozzle
contact
surfaoe
wear
limit
0.1
(4) Inspecting nozzle spring
Replace the nozzle spring if it is extremely bent, or the
surface is scratched or rusted.
(5)
Nozzle holder
Check the oil seal surface for scratches/wear; replace
if the wear is excessive.
6-4 Fuel injection nozzle reassembly
The fuel injection nozzle is reassembled
in
the opposite
order to disassembly
(1)
Insert the adjusting shims, nozzle spring and nozzle
spring seat
in
the nozzle holder, mount the stop plate
with the pin, insert the nozzle body/nozzle set and
tighten the nut.
(2)
Use the special holder when tightening the nut for the
hole type nozzle as
in
disassembly.
Nozzle nut tightening torque
Hole
type
nezzle
kg·m
4~4.5
Printed
in Japan
HI!XSHI-H8009
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