- condition and degree of wear of the brushes, their free movement in the grooves of the brush holders;
- brushes fit to the collector and spring pressure on the brushes;
- appearance of the manifold. The manifold can only be cleaned with a clean rag soaked in gasoline or trichloroethylene. Sand the manifold only with fine-grained sandpaper. It is prohibited to use sandpaper for this purpose;
- the condition of the most so-called bushings of the covers. When replacing bushings, put new bushings before installation in boiling motor oil for 5 minutes;
- appearance of the anchor and stator. Make sure that their windings have no breaks or signs of burning;
- when assembling, install a new retaining ring.
[A link to the original source is available on the website AUDIMANUAL]
