Table of contents: Checking the condition of the… ↓ Examination ↓
1. Over time, road film builds up on windshield wipers, reducing their effectiveness, so wipers should be washed regularly in a mild cleaning solution.
Checking the condition of the brushes and the initial position of the wiper arm
2. Wiper blade assemblies should be inspected regularly. If inspection reveals hardened or cracked rubber on the blades, replace the blades. If inspection reveals nothing unusual, wet the windshield, turn on the wipers, let them run for a while, and turn them off. Uneven marks from the blades on the glass or streaks on clean glass indicate that the blades should be replaced.
3. If the wipers do not clean the windshield well enough, the following reasons may be the cause.
- When your car goes through an automatic car wash, wax particles get on your windshield. These particles can be removed by adding a wax-dissolving detergent to your windshield washer fluid.
- Filling the reservoir with a glass cleaner with wax-dissolving properties can significantly improve the performance of the windshield wipers. Grease-dissolving cleaners are not able to completely clean the glass.
- Damage to the brushes can also be the cause of poor glass cleaning; the brushes should be replaced.
- The angle of installation of the windshield wiper arms does not correspond to the required one.
4. During operation of the windscreen wiper mechanism, the mounting nuts may become loose, so they should be checked and, if necessary, tightened each time the wipers are checked.
Examination
5. Turn the windshield wipers on and off, which will reset them to their original position.
Windshield:
Check the distance between the brush and the lower edge of the windshield when the wiper is switched off. The distance should be on the driver's side a = 15 - 25 mm, on the front passenger side b = 17 - 27 mm. Markings -1- are located at these locations.
Rear window:
When the windshield wiper is turned off, the brush should lie horizontally at the upper edge of the wiper stopping plane.
Checking the wiper arm angle
Warning: Check the wiper arm angle when the glass cleaning efficiency is low or when there is noise from the wiper blades.
6. Turn the windshield wipers on and off, the windshield wiper arms will return to their original position. Remove the windshield wiper blades.
7. Insert windscreen wiper arm 1 into the HAZET 4851–1 or AUDI 3358 tool and secure with the bolt.
Checking and adjusting the angle of the windshield wiper arm
- 1 wrench
- 2 wiper arm
- 3 tool AUDI 3358
8. if adjustment is necessary, carefully turn the AUDI 3358 tool with spanner 1 until the pointer on the scale is at the required value of ±2°.
Nominal values of the wiper arm tilt angles.
- Driver side: -9°
- Front passenger side -3°
- Rear wiper: 0 – 2°
9. Remove the AUDI 3358 tool, install and secure the wiper blades.
10. Install the blade and check the operation of the wiper.
[This publication is borrowed from the resource «audimanual»]