Motor Service; Inspecting The Motor Brushes; Motors With Internal Cooling Fans; Motor Removal And Installation - Taylor-Dunn RE-380-36 Operator's And Service Manual

Maintenance, Service, and Repair
INSPECTING THE MOTOR
BRUSHES

Motors with internal cooling fans

Typical motor with cooling fan indicated by
the arrow
NOTE: There are four brushes in the motor. The
brushes will not wear at the same rate. It is
recommended that all four brushes are
inspected at the same time.
NOTE: In some vehicle configurations it may not be
possible to inspect all four brushes while the
motor is in the vehicle. Refer to
Transmission Service
information on removing the motor.
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.
6. Look through the brush cover and compare the
top of the brush to the top of the brush holder. If it
is even with or below the top of the brush holder
then the brushes should be removed and
measured. Refer to
section for information regarding removing the
motor brushes.
7. If any one brush is less than or equal to the service
Service Limits
limit specified in
brushes should be replaced.
8. Reconnect the main positive and negative cables
at the batteries.
9. Remove the blocks from behind the wheels,
release the park brake and test drive.

Motor Service

Page 2
section for
Replacing the Brushes
, then all four
MOTOR REMOVAL AND
INSTALLATION
Transmission
See the
removing or installing the motor.

MOTOR INSPECTION

Disassembly
1. Remove the motor from the vehicle. See the
Transmission
section for information on
removing the motor.
2. Remove the brush cover and pull the brushes out
away from the commutator.
3. Remove the dust cap from the rear motor housing.
4. Place the motor in a press, and press the armature
out of the rear bearing.
NOTE: Removing the armature will damage the motor
bearing. The motor bearing should be
replaced whenever the armature is removed.
5. Remove the housing screws from the rear motor
housing and remove the housing from the motor.
6. Remove the nuts from the armature studs and
remove the two brush assemblies.
7. Remove the bearing circlip and press the motor
bearing out of the housing and discard.
Inspection
1. Measure the length of
each motor brush.
• If any one brush is
less than or equal to
the service limit
specified in section
Service Limits
then all four brushes
should be replaced.
Replacing the Brushes
Refer to
information regarding replacing the motor
brushes.
2. Measure the diameter of the commutator.
• If the commutator is less than the minimum
diameter specified in section
then the motor must be replaced.
section for information on
,
section for
Service Limits
,