SERVICE SHEET No. 1008
(con/d.l
When replacing the plugs see that the copper jointing washers are in position, insert the plug very
carefully through the -hole in the shroud, screw in with the fingers and finally tighten with the plug spanner.
When replacing the high tension leads and plug terminals make sure that the lead from the right hand
coil is placed on the right hand side spark plug, and the one from the left hand coil on the left .hand side
spark plug.
Cleaning the Carburetter.
It is sometimes necessary to dismantle and to clean the carburetter
to remove any foreign matter
that may have found its way through the two filters, or to remove moisture which is certain to accumulate
sooner or later. This is an operation which can be done without removing the valances, though the work
will be simplified if it is carried out when the valances have been removed for some other operation.
Assuming that the operation is to be
carried out without removing the valances
first turn
off the, petrol
at the tap.
Remove
the nut
from the left hand
side rocker box stud this being the one
which retains
the petrol tap bracket.
Lift the bracket
up and swing it to
one side out of the way.
Now, with a
short screwdriver slacken off the screw
(29 Fig. 28) on the left hand side of the
carburetter
which
secures
the
banjo
union on the end of the petrol pipe to the.
float chamber.
Be very careful ~;;,
lifting the screw out nOVl~ lose the
washers each sjde of the banjo uniorf~anQ
not to damage or drop the 'cylindr~cal
gauze filter inside the union.
Place the screw, washers. and
filter carefully on one sidEf'
Unscrew the two
t"
nuts and washers
securing the swan neck manifold to the
cylinder head and carefully work, the'
carburetter
complete with manifold off
the studs.
I t is sometimes 'consid~E,ed
easier to remove the manifold from the
studs and to unscrew the banjo union
afterwards but this is a matter of choice.
33~
1. Starter Slide Control Rod.
2.
Bracket for Control Rod.
:·L Cover Plate Screw.
4.
Cable Adjuster.
5.
Locknut for Cable Adjuster.
6.
Cover Plate.
7.
Spring, Main Slide.
8:
Starter Slide.
9.
Main Slide and Needle.
10. Clamping Screw.
II.
"0" Ring.
12.
Carburetter Body.
13.
Spring, Throttle Adjustment Screw.
14.
Throttle Adjustment Screw.
15.
Slow-running Jet.
16. Float.
17.
Carburetter
Bowl Screw (2).
18. Carburetter
Bowl.
19. Gasket.
20.
Main Jet.
21.
Emulsion Tube.
22.
Air Intake Gauze
23.
Cover for Air 1ntake
24,
Cover Screw (2)
25.
Filter Elbow Washer.
26.
Filter Gauze.
27.
Filter Elbow.
28.
Filter Plug Washer.
29.
Filter Plug.
30.
Plugging Screw.
31.
Clamping Screw Nut.
32.
Split Pin.
33. Spring for Tickler.
34.
Tickler Stem.
Unscrew
the two small
fG"
pins
(17, Fig. 28) one on each side of the
Gauze.
The carburetter
can now be lifted
up and out of the engine shields for
removal of the float chamber, etc., for
cleaning.
In normal circumstances it is
only
necessary
to
remove
the
float
chamber
and
possibly
the
pilot
and
main jets.
(15 and 20, Fig. 28).
Fig. 28.
The carburetter.
7
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