Chevrolet Fleetmaster Series 1947 Owner's Manual page 28

the top cover and element from the air cleaner, and slushing the
element in gasoline and then letting it drain and dry. After it is
thoroughly cleaned and dry, the element should be dipped in
engine oil and again drained, after which it is assembled to the
air cleaner.
Under extreme conditions, when the car is operated on gravel
or dusty roads all the time, this cleaning operation must be done
at more frequent intervals.
For service and special equipment, a heavy duty air cleaner
is available, designed for di-
rect attachment to downdraft
carburetors. This cleaner is
suitable for operating in ex-
tremely dusty conditions, and
is quickly interchanged with
the air cleaner installed as
standard equipment, and will
not affect the power and econ-
omy in any way. Oil of not
less than S.A.E. 50 viscosity
must
be used in summer and
Fig. 29-Heavy Duty Air Cleaner
lighter grades in winter and
the level must be maintained.
One pint of this oil will fill the cleaner to its proper level.
Servicing of this cleaner, an important operation, must be
performed as follows:
Remove the air cleaner from the carburetor. Remove the
wing nut from the top and remove the cover. Remove the filter
element assembly.
CAUTION: Do qot pry this part loose . i f it sticks. It must be removed by
hand because you may damage the fllter element flange. which must lie
flat against the body to insure a tight seat at this point to prevent air
leaks when the cover is assembled.
Empty the oil out of the cleaner and clean out all accumu-
lated dirt. Wash body with clean gasoline and wipe dry. Wash
filter element by slushing up and down in clean gasoline. Dry
thoroughly, either with an air hose or by letting it stand until
dry. Fill the body of the cleaner with one pint of oil of not less
than S.A.E. 50 viscosity in summer and lighter grades in winter.
It
is not necessary to re-oil the filter element as this is done auto-
matically when the car is driven.
Reassemble the filter element to the body of th.e cleaner,
being sure that the flange is set flat against the top flange of
twenty-.rix