Taylor-Dunn B0-011-00, Operation, T Roubleshooting And Replacement Parts Manual

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MB-100-00
Section 3 Page 38
Armature Inspection
6. Remove the motor from the drive.
7. Remove the two armature retaining screws from
the rear cover.
8. Pull the armature out from the open end of the
motor housing.
9. 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.
10. Inspect the armature for grooves.
Note: If the armature is grooved, then the grooves
may be removed with the use of a lathe.
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.
Undercut Figure: The left side shows how to properly cut the mica using a
hacksaw blade. The right side of the figure shows the minimum diameter of the
commutator and the proper mica depth.
11. Measure the diameter of the commutator.
Note: The wear limit of the commutator is 2.625
inches. If the commutator is less then 2.625
inches, then it is worn out and the motor
must be replaced.
12. Measure the undercut depth on the
commutator.
Note: The undercut depth is .025 inches. If the
undercut depth is less then .025 inches, the
mica can be recut to the proper depth.
13. Spin the bearing by hand. If any vibration
or roughness is felt, it must be replaced.
14. Reassemble the motor in reverse order.
15. Install the motor.