Recommendation: A faulty windshield wiper motor-reducer should be replaced as an assembly.
Disassembly
1. Remove the windshield wiper from the car.
Warning. If the wiper arms were raised to the vertical position before removing it, you must connect the motor-reducer wiring harness connector to the vehicle's on-board network, turn on the wiper in intermittent mode, and wait until the wiper has completed a full cycle before turning it off. After this, you can disassemble the wiper.
Helpful Hint: Before removing the rods, remember or mark their positions. This will make it easier to reassemble the wiper.
2. Using a large slotted screwdriver, disconnect all the ball joints of the windshield wiper rods.
3. The windshield wiper motor-reducer crank is mounted on the shaft splines and can be installed on the shaft in any position during assembly. Therefore, before removing the crank, use a marker to mark its position relative to the motor-reducer bracket.
Warning: If the crank is not oriented correctly on the motor-reducer shaft, the windshield wiper will not operate correctly.
4. Using a 13 mm open-end wrench, unscrew the crank mounting nut.
5. Using a screwdriver, remove the crank from the splines of the windshield wiper motor-reducer shaft.
6. Using a 10 mm open-end wrench, unscrew the three bolts securing the gear motor to the bracket.
7. Remove the gear motor from the bracket.
Lubrication
8. The brush arm shafts are secured in the bracket using an E-shaped lock washer installed in the groove of the axle. Insert a thin slotted screwdriver into the hole of the lock washer and, turning the screwdriver around the axle, remove the lock washer.
9. Remove the upper adjusting washers from the axle.
10. Remove the shaft from the bracket and remove the lower adjusting washers. Place the upper and lower adjusting washers separately so that all washers can be installed in their places during assembly.
Note: Be careful not to lose the rubber sealing ring located in the bracket hole. If damaged, the ring should be replaced.
11. Using a rag soaked in white spirit, clean the shaft from old grease, dirt and traces of corrosion. Apply plastic grease to the shaft (Litol-24 or equivalent).
12. Lubricate the shaft of the other wiper arm in the same way.
13. Using a rag soaked in white spirit, clean the wiper rod hinge joints from old grease and dirt. Apply plastic grease to the hinge joints.
Assembly
1. Insert the lever shafts into the bracket in the reverse order of disassembly (not forgetting about the upper and lower adjusting washers).
2. Attach the windshield wiper motor-reducer to the bracket.
3. If the motor-reducer engine was replaced with a new one or was checked for rotation in the removed state, then before installation, its shaft must be set to its original position. To do this, connect the motor-reducer to the vehicle's on-board network via a connector. Briefly turn on the windshield wiper. After the motor-reducer, having worked a full cycle, stops, disconnect it from the network.
4. Install the crank on the motor-reducer shaft in accordance with the mark on the bracket. Use a 13 mm open-end wrench to tighten the windshield wiper arm mounting nut.
5. Assemble the hinge joints of the windshield wiper rods using sliding pliers.
6. Install the windshield wiper and all removed parts on the car in the reverse order of removal.