Inspection

INSPECTION

ROTOR CHECK





1. Check the continuity between the slip rings of the field coil. If the resistance value is not within the standard value, replace the rotor.
Standard value: approximately 2 - 5ohms






2. Check the continuity between the slip ring and the core. If there is continuity, replace the rotor.

STATOR CHECK





1. Check the continuity between the coil lead. If there is no continuity, replace the stator.





2. Check the continuity between the coil and the core. If there is continuity, replace the stator.

RECTIFIER CHECK





1. Check the continuity between the positive rectifier and the stator coil lead connection terminal with a tester. If there is continuity between the terminals, the diode is shorted, so replace the rectifier.





2. Check the continuity between the negative rectifier and the stator coil lead connection terminal with a tester. If there is continuity between the terminals, the diode is grounded, so replace the rectifier.

BRUSH CHECK





1. Replace the brush if the brush protrusion length shown in the illustration is below the minimum limit value.
Minimum limit: 2 mm (0.08 inch)






2. The brush can be removed by unsoldering the brush lead wire.
3. When installing a new brush, push the brush in to the brush holder, and solder the lead wire.