FUEL
SYSTEM
SERVICE
3. After-drip test.
An
injection nozzle is considered defec-
tive if
it
drips fuel accumulated on the bottom
of
the noz-
zle after fuel injection is stopped during the chattering
test. Replace such a nozzle. A very small amount
of
fuel
may sometimes remain on the top
of
the nozzle. This is
due to chattering and is not detrimental.
AFTER
DRIP
TEST
DJ
10
~
~~.
'.
~
,.
GOOD
BAD
BAD
4.
Injection Condition
Test.
Operate the tester lever quickly
(at a rate
of
800 strokes per minute). The nozzle should
inject a fine atomozed mist
of
fuel straight
in
its axial
direction. A spray in the form
of
particles is cause for
rejection.
5.
Install the Nozzle Holder Assembly. Install the tested
nozzle holder assembly
in
the cylinder head. Tighten
bolts
to
the specified torque. Be sure to install the assem-
bly together with new sealing washers.
A
CAUTION:
When
installing
the
nozzle
holder
assembly
in
the
cylinder
head,
fit
the
holder
loosely
with
two
bolts
temporarily
tightened.
After
fitting
the
injection
pipe,
retighten
the
bolts
evenly
to
the
specified
torque.
Engines
&
Generators
43
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