Hudson 481 Series Owner's Manual page 71

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load, some fogging or frosting may develop. This can be reduced by turning on the
defroster fan which is controlled by the switch knob on the front of the heater. The fan
should be turned off after the windows are clear.
The defroster fan should also be turned on when icing of the windshield occurs and
while standing or at low speeds (either summer or winter driving) when the forward
movement of the car is not sufficient to supply the required air flow through the cowl
ventilator. The cowl ventilator must be open when the defroster fan is being used.
When driving at high speeds in extremely cold weather, it may be more satisfactory
to cut down the air flow by partially closing the cowl ventilator. This will give an
increase in the temperature of the air delivered by the heater.
Heat is distributed from the front, back and both sides of the heater case so that a large
volume of air can be supplied to adequately heat or cool the entire car interior without
an excessive amount of air being directed on any of the front seat passengers. A knob
located on the left side of the heater case controls the amount of air directed on the
driver's feet. The maximum is obtained when the knob is in the up position.
CONVERTIBLE BROUGHAM TOP
The raising and lowering of the top on the Convertible Brougham model is accom-
plished by power applied through double acting hydraulic cylinders located within the
body structure. Power is furnished by a hydraulic pump, electrically driven, mounted
behind the rear seat. This unit should be serviced twice a year by making sure the oil
reservoir is at least half full. Use only Hudson Shock Absorber Oil for this purpose.
Access to the power unit for servicing is had by removing the cover from the body
underpanel.
To insure the top mechanism remaining in good condition, the top should be operated
at least once a month.
Power operation of the top is controlled by a two way switch fitted with a knob located
on the instrument panel to the left of the steering column.
TO LOWER TOP:
1. Stop car. Do not attempt to lower or raise top while car is in motion.
2. Release clamps at header on right and left sides.
CAUTION: Make sure clamps are completely free from the windshield.
3. Raise header slightly by hand and pull out control knob on instrument panel until
top is fully lowered. This may be done with the door and quarter windows in either the up
or down position. The rear window may also be in either the up or down position.
4. Tuck in surplus material at sides and install top boot.
HUDSON OWNER MANUAL