Check the rotor coil for continuity. Check to make sure that there is continuity between the slip rings. If resistance is extremely low, it means that there is a short. If there is no continuity or if there is a short circuit, replace the rotor assembly.
: Approx. 3.1Ω
Check the rotor coil for ground. Check to make sure that there is no continuity between the slip ring and the core.
If there is continuity, replace the rotor assembly.
Make a continuity check on the stator coil. Check to make sure that there is continuity between the coil leads.
If there is no continuity, replace the stator assembly.
Check the coil for grounding. Check to make sure that there is no continuity between the coil and the core.
If there is continuity, replace the stator assembly.
Unsolder the pigtail and remove the old brush and spring.
Install the brush spring and a new brush in the brush holder.
Insert the brush so that there is a space of 2 to 3 mm (0.079 to 0.118 in.) between the limit line and the end of the brush holder.
Solder the pigtail to the brush holder.
