WINDSHIELD WIPER SYSTEM
The windshield wiper system consists of a motor, a
five-position switch, and resistors in the overhead panel,
two wiper arms and blades, drive shafts, and actuators.
The 28 vdc electric motor is powered by the No 2. DC
bus thru the WSHLD WIPER circuit breaker on the No.
2 PDP. Mounted above center windshield behind the
overhead panel, the motor provides power to drive the
wipers thru flexible drive shafts connected from the
motor to the actuators.
The actuators convert the rotary action of the motor to a
back and forth motion to move the wipers. The actuators
are located inside the cockpit above the windshields.
The five position switch controls the speed at which
the wipers will move, (SLOW, MED, and FAST) and it
also has an OFF and PARK setting. If OFF is selected
while the wipers are in motion, the wipers will stop at
their current position. If PARK is selected, they will
return to the Stowed/Parked position against the inside
windshield frame. Two wiper arms maintain a constant
pressure to hold the blades against the windshields, as
long as the wind deflecting shield on the blade assembly
is installed with the upper/higher edge towards the
inside frame of the windshield.
END OF TASK