F U E L SYSTEM
-
Injection Nozzles
( 1 2H- T \
F U - 1 3
3.
fb) Using a wooden stick, remove the carbon adhering t o
t h e nozzle needle l i p .
( c ) U s i n g a b r a s s bru s h , remove the carbon from t h e
exterior of the n o z z l e body.
(d) Check the noz:zle body for burns Or corrosion.
(e) C h eck the nozzle needle t i p for damage Or corrosion.
I f any of these conditions a re presenl, replace t h e nozzle
assembly.
S I N K I N G TEST
(a) Wash the noz:zle in clean diesel fuel
NOTE :
00
not touch t h e nozzle mating s u rfaces with
your fingers.
(b) Tilt the nozzle body about
60
degrees and pull the
needle out about one third o f its length.
(e)
When released, the needle should sink down into the
body vent smoothly by its own weight.
(d) Repeat this test, rotating t h e needle s l i g h t ly each
time.
I f the needle does not
sink
freely. replace the nozzle
assembly.