1. If the brush springs are damaged or have lost elasticity, replace them.
2. Check the ease of movement of the brushes in the brush holder. They should move freely, without jamming. Replace worn or chipped brushes. When replacing, solder the terminals of the new brushes to the brush holder.
3. Clean the commutator with fine sandpaper if it is dirty or has marks, scratches, etc. If the commutator is badly worn or burnt, replace the anchor or gearbox with the electric motor as an assembly. If traces of seizure are found on the anchor journals, clean the journals with fine sandpaper.
4. Replace the gear reducer gear with badly worn or broken teeth.
5. Straighten the bent rods. If this is not possible, replace the rods as an assembly.
6. If the splines or threads of the shafts are damaged, replace the rods as an assembly.
7. Clean burnt or oxidized contacts of the self-stop mechanism with fine sandpaper.
8. Replace torn, cracked or loose rubber cushions and other rubber parts.
The information is posted on the portal [VAZBOOK]