F U E L SYSTEM
-
Injection Nozzles
[ 2 H ]
(b) Using a wooden
s t i ck,
remove the
carbon a
d
h
erin
g
to
the nozzle needle
t i p .
(e)
Using
a
brass brush, remove t h e ca rbon from the
exterior o f the nozzle body.
(dl Check the seat o f the nozzle
body
fOf bums or corro-
sian
(e)
Check
the nozzle needle tip for da mage o r corrosion.
If any of these conditions are presented,
replace
the
nozzle assem bly.
3.
S IN KING TEST
(a ) Wash the n O z z le in clean d iesel fuel.
NOTE: Do nOt touch t h e nozzle mating surfaces with
your fingers.
fbi Tilt
t h e nozzle body about
60
degrees and pull the
needle out aboul one third o f i t s leng t h .
(e) When
released, the needle should s i n k d o w n i n t o t h e
b o d y v e n t smoothly
b y
ils o w n weight.
(d) Repeal this test, rOlating t h e needle
slightly
each
li me.
I f the needle does not sink freely, replace the nozzle
assembly.