# Inspection of motor parts

All parts | Clean all parts before inspection.
Bearings | Make sure that the bearings are free from damages and runs smoothly.
End plates | Make sure that the end plates surfaces are not scratched or damaged. Do a flatness test of the end plates surfaces. If they are visibly worn or deformed, polish with fine grinding paste against a surface plate and then clean thoroughly.
Rotor | Make sure: that the end faces have no marks or burrs that the splines are not worn or cracked that the plug holes have no cracks.
Cylinder | Make sure that the bore is not scratched or damaged. If the end surfaces are rough, polish with fine grinding paste against a surface plate and then clean thoroughly.