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end of the pipe is directed onto a pad of cloth or into a container.
If fuel is delivered, starvation is almost certainly being caused by the float needle sticking to its
seating, and the float-chamber lid should therefore be removed and the needle and seating cleaned
and refitted. At the same time, it will be advisable to clean out the entire fuel feed system, as this
trouble is caused by foreign matter in the fuel and unless this is removed it is likely to recur. It is of no
use whatever renewing any of the component parts of either carburetter, and the only cure is to make
sure that the fuel tank and pipe lines are entirely free from any kind of foreign matter or sticky
substance capable of causing this trouble.
Fig. D.13 Showing the place where the float lever should be set and the method of checking the
correct adjustment of the lever
D.14 AIR CLEANERS
Every 3,000 miles (4800 km.), or more frequently in dusty conditions, the air cleaners should be
serviced as follows: unscrew and remove the two bolts, remove the outer cover, and withdraw the
element from the body of each cleaner. Wash the element thoroughly in petrol (gasoline), drain, and
dry. Wet the element with S.A.E. 20 engine oil and allow to drain before replacing.
A modified air cleaner, incorporating a venturi, was introduced at Car No. 2468.
D.15 MODIFIED CARBURETTER DAMPER ASSEMBLIES
To allow the carburetter pistons to lift more freely new hydraulic damper assemblies have been fitted
in production. The damper pistons of the new assemblies have been shortened from .378 in. (9.596
mm.) to .308 in. (7.823 mm.).
The new hydraulic damper assemblies (Part No. AUC8114) are identified by the letter 'O' stamped on
the brass hexagon caps. They can be fitted, with advantage, to earlier carburetters in pairs.
Alternatively, the original damper pistons may be modified by machining .070 in. (1.78 mm.) off their
lower faces.
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