Perkins L4 Workshop Manual - L-36 Fleet
Perkins L4 Workshop Manual - L-36 Fleet
Perkins L4 Workshop Manual - L-36 Fleet
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Page 514 Fue/ lnjection System-connnuea<br />
Af ter cleaning, the atomiser shou!d he tested<br />
always on the atomiser testing pump as previously<br />
described. If the pressure at \\hich the spray<br />
breaks is not that quoted above it can he adjusted<br />
by the spring adjusting screw and lock nut, using<br />
spanner ET119 (Fig. SlO).<br />
A perfect atomiser, when tested by pumping<br />
Cue! through it in the open air gives a short<br />
.. pinging" sound as the fuel emerges from the<br />
holes, no matter how slowly tbe fuel be pumped.<br />
After tbe atomiser has been in service for some<br />
time, the .. pinging" changes to a crackling<br />
sound. It is not until tbe atomiser sounds .. dead "<br />
that its condition is likely to affect tbe running of<br />
the engine.<br />
When replacing tbe atomiser in the cylinder<br />
head follow carefully tbe instructions for fitting<br />
given on page S9.<br />
MODIFlED ATO~ERS<br />
As from Engine No. 6012782 a modified atomiser<br />
was introduced on <strong>L4</strong> engines. the two main<br />
differences from the previous type being the auxiliary<br />
leak-off pipe connection and the atomiser adjusting<br />
screw (see Fig. 5.12).<br />
The auxiliary leak-off pipe connection is now on<br />
the side of the atomiser body fixing fiange whereas<br />
previously it was situated just above the inlet pipe<br />
union nut. This of course necessitates a new type<br />
auxiliary leak-off pipe.<br />
The atomiser adjusting screw now screws<br />
directly into the atomiser body and also comprises<br />
the atomiser valve spring cap.<br />
(~~~~:=~~=:::~ \<br />
'~ ~ e ~ '.<br />
o~; ~ ~~",5' ";4-'<br />
ET //6' rC-'f/ff/1"" '/FJ!L--1<br />
0 -<br />
Er /2/<br />
'f "Q~ ~////". ""/lY//fi~)<br />
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'-~ E T // S<br />
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IntercbangeabiUty .<br />
The rnodified atomiser is interchangeable with<br />
the previous type providing a new type auxiliary<br />
teak-oIr pipe is fitted. To ensure this. new type<br />
teak-oIr pip~s are autornatically supplied with all<br />
Spares and Reconditioned atornisers of the modified<br />
type. Previous type Reconditioned atomisers<br />
äre älS0 supplied with the previous type auxiliary<br />
teak-oIr pipes in order to effect interchangeability<br />
with engines incorporating the later type atornisers.<br />
FI1<br />
1 == ~<br />
i<br />
~<br />
"<br />
WASHERS LOCKNUT<br />
ADJUSTING<br />
SHIM WASHER - ---;:;;;;<br />
INLET<br />
tf<br />
E T 1.37<br />
E T 42'7<br />
SCREW<br />
NOZZLE HOLDER<br />
-CAP NUT<br />
r<br />
r<br />
r<br />
r<br />
NOZZLE<br />
-SPINOLE r<br />
NOZZLE<br />
'YALYE<br />
.NOZZLE<br />
Fig. SlO. Spanners and clcaning tools ror usc with atomisers. Fig. S12. Diagram of Modified Atomiset<br />
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