Checking the condition of the brushes and the initial position of the wiper arm
2. Wiper blade assemblies should be inspected regularly. If the inspection reveals the presence of hardening or cracks in the rubber of the brushes, replace the brushes. If nothing out of the ordinary is found on inspection, wet the windshield, turn on the wipers, let them run for a while, and turn them off. Uneven brush marks on the glass or streaks on clean glass indicate that the brushes should be replaced.
3. If the brushes do not clean the windshield well enough, then the following reasons are possible:
Wax particles got on the windshield while the car was being washed. These particles can be removed by adding a detergent to the washer fluid that has the property of dissolving wax.
Filling the fluid reservoir with a glass cleaner with wax-dissolving properties can significantly improve the performance of the windshield wipers. Grease-dissolving cleaners cannot completely clean glass.
If the brushes are damaged, they should be replaced.
The angle of installation of the windshield wiper arms does not correspond to the required one.
During the operation of the wiper mechanism, loosening of the mounting nuts can occur, so they should be checked and, if necessary, tightened each time the brushes are checked.
Examination
4. Turn on and off the wipers, while they will be installed in their original position.
5. Check the distance between the rubber band of the wiper blade and the base of the glass, which should be 20 mm on the windshield.
Checking and adjusting the angle of the wiper arm
The angle of the wiper arm should be checked if the wiper efficiency is poor or if the wipers move unevenly or vibrate during operation. The special tool HAZET 4851-1 is required for adjustment.
Examination
6. Set the wiper arms to their original position. To do this, moisten the windshield with water. Switch on the windshield wiper for a short time and stop it with the switch.
7. Remove the brush.
8. Take away the lever -2-. Install the HAZET special tool and fix it with the screw -3-.
9. Carefully pull back the lever. The HAZET tool must be in contact with the glass at three points.
10. Check the installation angle on the scale of the tool and compare with the required value.
Required value: -3°±2°.
Adjustment
11. Slightly move the lever away from the glass and turn a little with a 24 mm wrench -1-.
12. Check the installation angle again and, if necessary, correct it so that the scale shows the required value.
13. After that, remove the tool, reinstall and fix it. Check the installation angle again, correct if necessary.