Sealey TA320 User Manual page 18

individually. If the motor is disconnected at the motor terminals,
connect one megohmmeter lead to the grounded motor housing and
the other lead to One of the motor leads. DC-Disconnect the motor
from the line. To test the brush rigging,field coils and armature
connect one megohmmeter lead to the grounded motor housing and
the other lead to the brush on the commutator. If the resistance
measurement indicates a weakness,raise the brushes off the
commutator and separately test the armature, field coils and brush
rigging by connecting one megohmmeter lead to each of them
individually, leaving the other connected to the grounded motor
housing. The above also applies to DC Gemerators.
17