Rear Screen Wiper Operating Principle (Wipers and washers)

The wiper arm is located on the splined shaft from the motor and secured with a nut. The wiper arm attachment to the splined shaft has a pivot to which the remainder of the arm is attached. The two parts of the arm are connected by a spring which controls the pressure of the blade on the screen to a predetermined amount.

The wiper blade is pushed onto the wiper arm which has a clip-on feature that allows the blade to pivot. The wiper blade comprises a lever, two yokes and a plastic strip. The rubber wiper is fitted to the plastic strip and held in the yokes. The lever, yokes and plastic strip ensure that pressure applied by the arm spring is distributed evenly along the length of the blade.

Rear Screen Wiper Operating Principle

A = Motor operating (forward operation - wiper at bottom of screen) B = Park position (reverse operation - off-screen parked)

1 Splined shaft 2 Motor worm drive 3 Coil spring 4 Cam

5 Gear wheel 6 Spigot 7 Link 8 Motor