Wiper Pivot: Testing and Inspection

WM 923949 Eliminating symptoms on body exterior: Reworking wiper shaft

Technical values





General information

Symptom

The rear wiper does not wipe the upper area of the rear window properly.

Causes and remedial action

Cause

On vehicles with heat-insulating laminated glass (I-no. PJ1), spacers fitted at the wiper shaft attachment points can reduce the contact pressure of the rear wiper, thereby resulting in an unsatisfactory wiper function.

Remedial action

In the event of a complaint, remove the spacers between the wiper shaft and rear lid.

Preliminary work

1. Check wiper blade for signs of damage or deformation.
2. Replace wiper blade if damaged or deformed.
3. Check wiper function.
3.1. Spray outside of rear window completely with water.
3.2. Switch on ignition, actuate the wiper for the rear window wiper system and check the wiper function.





Checking wiper function

3.3. If the wiper function is OK, end of remedial action.
4. Remove wiper arm for rear window wiper system. => 92411900 Removing and installing wiper arm for rear window wiper system - section on "Removing"

Reworking wiper shaft

1. Open rear window.
2. Carefully unclip cover using a plastic wedge -arrows A- and remove it -arrow B-.





Removing cover

3. Unscrew fastening nut -1- ( -arrow- ).





Unscrewing fastening nut

4. Unscrew fastening nuts -2- and remove wiper shaft -1- ( -arrow- ).





Removing wiper shaft

5. Remove spacers -3- and dispose of them.
6. Fit wiper shaft -1- ( -arrow- ) and secure in place with the fastening nuts -2-. => Tightening torque: 7.2 Nm (5 ftlb.)+/-0.7 Nm (+/-0.5 ftlb)





Installing wiper shaft

7. Tighten fastening nut -1- ( -arrow- ). => Tightening torque: 17 Nm (13 ftlb.)





Tightening fastening nut

8. Clip in cover -arrow-.





Fitting cover

9. Install wiper arm for rear window wiper system. => 92411900 Removing and installing wiper arm for rear window wiper system - section on "Installing"

Working time

92394900: Reworking wiper shaft with bearing for rear window wiper system; Labor time 40 TU