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Page 514
Fue/ lnjection System-connnuea
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IntercbangeabiUty
.
The rnodified atomiser is interchangeable with
the previous type providing a new type auxiliary
teak-oIr pipe is fitted. To ensure this. new type
teak-oIr pip~s are autornatically supplied with all
Spares and Reconditioned atornisers of the modi-
fied type. Previous type Reconditioned atomisers
äre älS0 supplied with the previous type auxiliary
teak-oIr pipes in order to effect interchangeability
with engines incorporating the later type atornisers.
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Af ter cleaning, the atomiser shou!d he tested
always on the atomiser testing pump as previously
described. If the pressure at \\hich the spray
breaks is not that quoted above it can he adjusted
by the spring adjusting screw and lock nut, using
spanner ET119 (Fig. SlO).
A perfect atomiser, when tested by pumping
Cue! through it in the open air gives a short
.. pinging" sound as the fuel emerges from the
holes, no matter how slowly tbe fuel be pumped.
After tbe atomiser has been in service for some
time, the .. pinging"
changes to a crackling
sound. It is not until tbe atomiser sounds .. dead "
that its condition is likely to affect tbe running of
the engine.
When replacing tbe atomiser in the cylinder
head follow carefully tbe instructions for fitting
given on page S9.
WASHERS
LOCKNUT
ADJUSTING
SCREW
SHIM WASHER -
---;:;;;;
MODIFlED ATO~ERS
As from Engine No. 6012782 a modified atomiser
was introduced on L4 engines. the two main
differences from the previous type being the aux-
iliary leak-off pipe connection and the atomiser ad-
justing screw (see Fig. 5.12).
The auxiliary leak-off pipe connection is now on
the side of the atomiser body fixing fiange whereas
previously it was situated just above the inlet pipe
union nut. This of course necessitates a new type
auxiliary leak-off pipe.
The atomiser adjusting screw now screws
directly into the atomiser body and also comprises
the atomiser valve spring cap.
NOZZLE
-SPINOLE
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INLET
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NOZZLE
HOLDER
-CAP
NUT
(~~~~:=~~=:::~
\
'~
~
e
~
'.
o~;
~
~~",5'
";4-'
ET //6'
rC-'f/ff/1""
'/FJ!L--1
Er
/2/
'f
"Q~ ~////".
""/lY//fi~)
L_--~"'-~
'-~
E T // S
0
~/lA.. ;
eT //7
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F
I 1
0
-
NOZZLE
'YALYE
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,
1
==
~ ~
i
"
~
tf
E T 1.37
E T 42'7
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.NOZZLE
~
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Fig. SlO. Spanners and clcaning tools ror usc with atomisers.
Fig. S12. Diagram of Modified Atomiset
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