MAINTENANCE
Due to its small number of moving components and its basic design, maintenance of the brake is
generally necessary only after extended service. When a problem appears in the system, ensure
that all couplings, belts, etc., and the control device are functioning properly. Use the
Troubleshooting guide on previous page to determine the cause of the problem.
The brakes can be rebuilt with a repair kit that returns it to “as new” condition. A repair kit
includes a new powder charge and the appropriate bearings, seals and snap rings generally
needed to rebuild the unit.
Repair kit part numbers
29LRKB25 B25 model
29LRKB50 All B50 and B100 models
NOTE: When ordering parts not contained in the kit, provide the model number, serial number
and parts list item number.
BRAKE DISASSEMBLY
1. Remove the set screws from shaft.
2. Remove conduit box cover, one nameplate screw, and four through bolts.
3. Remove right stator and bearing by tapping lightly on shaft with soft mallet. Remove o-rings.
4. Lift out coil and stator ring. (Do not remove stator ring from coil unless coil is to be replaced.
Coil can only be pressed out in direction of lead slot.)
5. Remove rotor assembly from left stator by tapping lightly on shaft with a soft mallet.
6. Pry up tab on bearing lockwasher and remove bearing locknut. Remove bearing rotor, key,
and bearing from shaft.
7. Clean gasket compound from sides of coil and insides of stator halves. Do not immerse coil
in solvent.
Reassemble the brake in a clean area.
The brake components must be cleaned with solvent and be totally free of any grease or
oil.
Any oil or grease left on parts will cause failure when unit is rebuilt.
Discard all bearings, seal, and magnetic powder from disassembled brake; use the new
components that are provided in the repair kit.
Assembly instructions are on the next page.
