Under extreme conditions where the car or truck is operating on
gravel or dusty roads all of the time, this cleaning operation
must be done at more frequent intervals.
Air Cleaner and Flame Arrester — Trucks
For
service and special equipment a duplex air cleaner is available.
It is a heavy duty type de-signed for direct attachment to down-draft
car-
Fig. 263— Special Duplex Air Cleaner
buretors. This cleaner is suitable for any kind of passenger car
or truck service where these units are operating in very dusty
conditions and localities. Fig. 263.
Its advantages are simplicity, ease of installation and ease of
maintenance. There is no resistance in the cleaner, to disturb
carburetion and the cleaning efficiency is very high. Extensive
tests under severe conditions has shown a high cleaning efficiency.
In operation, dusty air enters the cleaner up-ward through louvres
around the top, reverses direction, and passes downward to an annular
venturi just above the oil level. The increased air velocity, due
to the venturi effect, throws the heavier dust particles into the
oil in the base of the
Assemble the top cover to fuel pump body and tighten cover screws
alternately and securely. Assemble the glass bowl to the cover,
making sure that cork gasket is in good condition and that the
bowl nut is tight to prevent air leaks at this point. Install fuel
pump on engine.
Air Cleaner and Intake Silencer
The air which is taken into the carburetor, to mix with the fuel,
is thoroughly cleaned in passing through the combined air cleaner
and flame arrester mounted on the top of the carburetor at the
air in-take. Fig. 261-2.
Fig. 261— Air Cleaner and Flame Arrester — Passenger
Cars
Cleaning of the air is accomplished by a pad of woven copper gauze,
through which the incoming air passes, depositing all particles
of dust, dirt and grit on its oil covered edges. This metallic
gauze pad also quenches any flame that may be caused by backfire
through the carburetor.
Located within the air cleaner is a resonance chamber so located
and proportioned to the larger intake chamber, that the roar and
hiss of incoming air is completely silenced.
Under ordinary conditions, where the car is driven on pavement
or surfaced roads, the air cleaner should be removed every 2000
miles and the dirt that has collected on the copper mesh cleaned
out. This is done by removing the air cleaner from the carburetor
and the top cover and felt pad from the air cleaner, and slushing
that part of the air cleaner that contains the copper mesh in gasoline
and then letting it drain and dry. After it is thoroughly cleaned
in gasoline, the copper mesh should be dipped in motor oil and
again drained, after which the top cover and felt pad are assembled
to it and the air cleaner assembled to the carburetor.
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