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Float Chamber Fuel Level
The level of the fuel in the float chamber is adjusted by setting the fork
lever in the float chamber lid. It is suggested that the following procedure for
its adjustment is adopted,
1.
Disconnect the fuel feed pipe from the float chamber lid, then remove the
lid securing nut, washers and overflow pipe.
2.
Lift the lid off the float chamber.
3.
The set of the forked lever is correct, when, with the lid of the float
chamber inverted and the shank of the forked lever resting on the needle
of the delivery valve, it is possible to pass a 7/16" (11 mm.) diameter rod,
see " A " Fig. 29, between the inside radius of the forked lever and the
flange of the lower face of the float chamber lid.
If the forked lever fails to conform within 1/32
figure, it must be carefully bent, at the start of the fork section, taking
care to keep both prongs of the fork level with each other.
It must be emphasised that it is not advisable to alter the fuel level
unless there is trouble with flooding. Although too high a level can cause
slow flooding, particularly when a car is left ticking over on a steep drive,
it should be remembered that flooding can also be caused by grit in the
fuel jamming open the needle valve, undue friction in the float mechanism,
excessive engine vibration, or a porous float.
Re-assemble the carburettor and connect fuel pipe.
4.
Cleaning Suction Chamber and Piston
This should be done at approximate intervals of twelve months.
detaching the unit, clean the main inside bore of the suction chamber, and the
two outside diameters of the piston with a rag moistened in petrol and then
re-assemble in a dry and clean condition with a few spots of thin oil on the
piston rod only. Do not forget to replenish the damper reservoir after this
operation.
RUNNING ADJUSTMENTS
Fig. 29.
Adjusting the fuel level.
3 6
"
(.8 mm.) of the check
After
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