Workshop
Manual
Rolls Royce Silver Shadow
6
Bentley
7
Ser~es
Chapter
K
SYMPTOM
Carburetteg-~ontinued
8.
Stalling.
POSSIBLE
CAUSE
(b)
Sticking carburette] plston
caused by a bent d-mper rod.
(c) Sticking carburetter piston
caused by
dirt
between the sue
tion chamber and p~ston rod
sticking
in
its
bush.
-
8.
(a)
Flooding
of the float
chamber
or the jet.
ACTION
(b) Remove the oil
cap
and damper
piston assembly and repeat the
check for a sticking piston
(see
7
(a)).
If it is determined that
the damper rod is bent a new
damper rod should be fitted.
,c)
Remove the suction chamber
and damper piston assembly,
then remove the air valve piston
assembly. Clean the parts with
clean petrol or methylated spirits
and wipe dry with a clean
lint-
free cloth. Apply a few drops of
clean light oil to the piston rod.
Fit the damper assembly and
washer to the suction chamber.
Seal
the transfer holes in the
piston assembly with
mbber
plugs and fit the assembly to
the suction chamber.
Invert the complete assembly
and allow the suction chamber
to fall away from the piston.
Check the time it
takes,
which
should
be
between
5
and
7
seconds, remove the plugs and
damper assembly
On no account should any
attempt
be
made to increase the
bore of the suction chamber. or
to reduce the diameter of the
enlarged part of the piston, as
the maintenance of a limited
clearance between these two
parts is essential for the correct
o ration of the carburetter
Ipthe needle is disturbed or
renewed the carburetters must
be tuned
(see Section K4 The
Carburetrers and Automatic
Choke System
-
Carburetter
Tuning).
8.
(a) Examine the float to detemne
if it is punctured; renew if
necessary.
Examine the needle valve seat-
ing
to ensure that it is clean and
serviceable.
Check that the float level is
correct
(see Section K4-The
Carburetters and Automatic
Choke
System-Carburetter-
To assemble).
Ensure that the cork gasket
between the float chamber body
and the lid is in good condition.
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