757 AMM 飞机维护手册 防冰和排雨 CHAPTER 30 - ICE AND RAIN PROTECTION(129)

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Component Details (Fig. 1)
_________________
 A.  Windshield Wiper/Rain Repellent Control Panel
 (1)  Windshield wiper/rain repellent control panel M10023 is on pilots' overhead panel P5. The control panel contains a switch to control the windshield wiper system. Switches controlling the rain repellent system are also on the panel.
 B.  Windshield Wiper Motor/Converter
 (1)  
The two windshield wipers are driven by separate motor/converters. The motor/converter is a single unit. Each unit is mounted to an access panel below its respective window.

 (2)  
The rotary motion of the motor is changed by the converter to produce the sweeping motion of the wiper arm. The motor runs at low or high speed, depending on the wiper speed chosen by a switch setting in the flight deck. A parking switch in the motor/converter sets the wiper blade to the park position when the wiper is turned off. The windshield motors use 28-volts dc power. A connector on each unit supplies power and control.

 C.  Windshield Wiper Arm
 (1)  The wiper arm connects the output shaft of the motor/converter to the wiper blade.
 D.  Windshield Wiper Blade
 (1)  The wiper blade consists of a wiper edge connected to a metal
 channel. This channel attaches to the wiper arm.Operation
_________
 A.  Functional Description (Fig. 2)
 (1)  
Windshield wiper/rain repellent control panel M10023 contains one rotary WIPER switch controlling both windshield wipers. The switch has OFF, LOW, and HIGH settings.

 (2)  
The LOW and HIGH positions change the speed at which the wiper blades are driven on the windshield.

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MAINTENANCE MANUAL

FLIGHT COMPARTMENT

RAIN REPELLENT WIPER OFF
LR

WINDSHIELD WIPER/RAIN REPELLENT CONTROL PANEL (P5)

Windshield Wiper System - Component Location
Figure 1

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MAINTENANCE MANUAL

L/R WINDSHIELD WIPER MOTOR (TYPICAL)

AFTER SELECTING "WIPER OFF" WIPER MOTOR CONTROL SWITCH REMAINS IN ON POSITION UNTIL WIPERS ARE PARKED
　
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