Taylor-Dunn ET 3000, Manual

Page: 94 / 216

Motor
Page 4
MB-T48-02
T-48 AC / ET 3000
DISASSEMBLE
Note: If the motor does not have the fan or brake, skip
to step #9.
1. Remove the fan housing.
2. R e m o v e t h e c i r c l i p
retaining the fan (Fig
1) and then remove the
fan from the armature
shaft. The fan is a slip fit
and should be able to be
removed by hand.
3. Install two 10-32 x 2”
machine screws into the
two open holes in the brake assembly. These screws
will hold the assembly together when it is removed
from the motor.
4. Remove the rubber seal ring from around the brake.
5. Mark the brake housing and motor housing so that
the brake can be reinstalled in the correct orientation.
6. Remove the three screws holding the brake
assembly to the motor and remove the electric motor
brake assembly.
7. Remove the three brake assembly spacers.
8. Remove the brake friction plate assembly.
9. Remove the nuts from the three cable terminals.
10. Mark the cable terminal cover so that it can be
reinstalled in the correct orientation.
11. Remove the cable terminal cover.
12. There are six cable
assemblies attached in
pairs to the three studs.
The center ‘V’ phase
cables (Fig 2) must be
removed from the stud
to enable removal of the
housing.
13. Remove the locking bolts
(Fig 3) for the four motor
assembly bolts.
14. R e m o v e t h e m o t o r
assembly bolts (Fig 3)
holding the end housing
to the field housing and
while carefully pushing
the cables through the
opening, remove the end housing/armature assembly
from the field housing.
Bearing and Sensor
Note: The bearing in Motor spec DLGF112150-4
consists of a combination bearing and armature
rotation sensor.
Bearing
Note: An “experienced ear” will be required to use
this procedure. If your are not familiar with the
normal sounds that emanate from a drive axle,
then the motor must be disassembled to inspect
the bearing.
1. Raise the rear wheels off of the ground and support
with jack stands.
2. Place a mechanics stethoscope on the rear motor
housing and listen to the bearing noise.
3 A faulty bearing will typically sound like a high pitch
grinding noise or squeal.
Rotation Sensor
A regulated 5 volt power supply is required for this
procedure.
It is recommended to use analog volt meters for this
procedure.
The motor connector details can be found at the end of
this chapter.
1. Disconnect the sensor cable from the motor.
2. Connect the positive lead of one volt meter to
terminal #2.
3. Connect the positive lead of another volt meter to
terminal #3.
4. Connect the negative lead of both volt meters to
the power supply negative.
5. Connect the regulated 5 volt power source to
terminal #1 (+) and terminal #4 (-)
6. SLOWLY push the vehicle while monitoring the volt
meters.
7. Each volt meter should alternately pulse as the
motor armature rotates (approximately 0.6 volts).