Starter “pasting” can be detected from increased noise and damaged starter pinions. In extreme cases, the motor ring gear may also be severely damaged.
“Pasting” is caused by a combination of dirt (clutch dust/abrasion, whirled-up road dust) in the clutch housing and grease on the armature shaft, the counter shaft, the steep thread and in the one-way clutch. This compound produces a paste that can no longer be lubricated.
Due to the formation of this paste, which can no longer be lubricated, the function of the starter, especially the freewheel gear and the steep thread, is impaired to such an extent that the starter pinion disengages too slowly from the engine ring gear. This results in the faults mentioned above. These can usually only be remedied by replacing the starter.
Use only greases suitable for this application or supplied by the manufacturer. Make sure that all cover plates and sealing plugs of the clutch housing are present and properly installed. If the starter is renewed, the clutch housing should be cleaned to avoid premature "pasting".