1) Complete disassembling into single component units
2) Correct cleaning and surface treatment (lubrication with grease according to original equipment regulation)
3) Comprehensive function tests on drive bearing, pinion and free-wheel gearbox (exchange of bearing bushes, rollers and springs), engagement lever, planetary gear and needle roller bearing
4) Checking on relay (armature, switch cover, coils), besides true running tests on armature unit and collector (exchange of bearing bushes)
5) Earth short circuit tests on pole box with winding (required exchange of carbon brushes)
6) Reassembling, final control

Price according to cost estimate and defects on item