Armature And Brush Inspection - Taylor-Dunn B0-T48-48 Taylor Truck T48 Operation Manual

Armature and Brush Inspection

1. Make sure the key-switch is in the "OFF" position, then remove
the key.
2. Place the forward-reverse switch in the center "OFF" position.
3. Set the park brake.
4. Place blocks under the front wheels to prevent vehicle
movement.
5. Disconnect the main positive and negative cables at the
batteries.
Visual Inspection of the Brushes
6. Remove the motor wires and headband assembly.
NOTE: The brushes must be replaced if
any damage is apparent. Replace the
brushes when the top of the brush is
even with the top of brush holder.
7. Using the appropriate proceedure remove the
motor from the drive and the armature from the
motor housing.
8. Check the inside of the motor housing and around
the commutator for bits of solder.
NOTE: If there are signs of solder either
around the inside of the motor housing or
the commutator, then the motor must be
replaced. The presence of solder in either of
the two areas indicates that the armature was
overheated.
9. Inspect the armature for grooves.
NOTE: If the armature is
grooved, turn down with a
lathe, cutting to a smooth
surface.
10. Measure the diameter of the
commutator.
NOTE: The wear limit of the
commutator is 2.75 inches. If
the commutator is less then
2.75 inches, then it is worn
out and the motor must be
replaced.
SECTION 3 PAGE 59
MB-T48-01