Optional Motor Brake; Remove And Disassemble; Assemble And Install; Service Limits - Taylor-Dunn TT-316-36 Service And Replacement Parts Manual

Motor SEM

OPTIONAL MOTOR BRAKE

Note: Although disassembly of the brake is outlined,
individual brake components are not available. If
any one brake component is faulty then the brake
is replaced as an assembly.

Remove and Disassemble

1: Disconnect the harness from the brake coil.
2: Remove the rubber sealing band from around the
brake.
3: Install two 1/4-20 x 1-1/4 screws to hold the brake
assembly together.
4: Insert a hex key through the 3 access holes
and remove the three screws holding the brake
assembly to the motor.
5: Slightly loosen the three adjuster nuts.
6: Remove the three flat head screws and remove
the outer pressure plate and friction hub.
7: Remove the three adjuster nuts
8: Remove the two 1/4 retaining bolts and remove the inner pressure plate.
9: Remove the springs from the magnet coil.

Assemble and Install

1: Thoroughly clean and inspect all components. Make sure there is no debris in the spring bores.
2: Install the springs.
3: Place the inner pressure plate onto the springs and install two 1/4-20 x 1-1/4 retaining bolts. Sequentially
tighten the two bolts until the plate is against the coil fully but they do not need to be torqued down.
4: Install the three adjuster nuts finger tight to the pressure plate.
5: Place the friction hub into the coil/plate assembly.
6: Place the outer pressure plate on top of the friction hub and install the three flat head screws. Do not torque
down at this time. They must be left a bit loose to allow for adjustment.
7: Remove the 2 retaining bolts.
8: Refer to the brake section for adjustment of the brake.

SERVICE LIMITS

WARNING
This section is one section of a complete service
manual. Before starting any procedure, read all
warnings and instructions that are located in the
Service Guidelines chapter.
This is a generic section covering all currently available SEM motors at the time this manual was revised.
The service limits listed below are for each of the motors, by the specification number of the motor shown. The
specification number can be found on the spec plate attached to the motor.
Motor part Number
(Specification Number)
70-054-41
(XP-1789 or DY2-4001)
70-054-42 (DY8-4002)
Page 72
Undercut Depth Commutator Diameter
(min)
mm inches mm
0.635 0.025 69.85
0.635 0.025 69.85
Brush Length
(min)
inches mm inches
2.75 15.87 0.625
2.75 15.87 0.625
TT-316-36
Resistance
(Ohms@75º F)
Armature Field
0.011 0.43
0.011 0.43
MT-316-06