Warner Electric AT Brake–Major User Manual

AT Brake–Major Service Repair

Instructions for Sizes 25, 55, 115

P-1405
819-0325

Repair Instructions

Contents

Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Warranty . . . . . . . . . . . . . . . . . . . . . . Back Page

Failure to follow these
instructions may result in product
damage, equipment damage, and
serious or fatal injury to personnel.

A major rebuild of an AT brake can be
accomplished by following these instructions to
replace the parts furnished in the appropriate
Warner Electric brake rebuild kit. Proceed
as follows:

1. Turn off all power to machine and brake using

appropriate electrical lockout procedures.

2. Disconnect the brake coil wires from the

incoming control unit wires, and remove
optional conduit box from brake if used.

4. Loosen the hub set screws holding brake on
shaft.

5. Remove the brake from its shaft by pulling
and/or gently tapping the hub with a hammer
and drift. Note: Do not hit the outer portion

of the brake outboard of the hub as this may
severely damage it.

6. Remove retaining ring.

3. Disconnect the anti-rotation torque arm from
the magnet.

Warner Electric • 800-825-9050 P-1405 • 819-0325

2

When installing or removing
this or other retaining rings, be sure to
hold the ring with one hand so it will not
spring away, endangering personnel and
property, should the pliers lose their grip
on the ring. Safety glasses should always
be worn when installing or removing
retaining rings.

Remove plate retaining screws and plate.

7. Remove the armature retaining screws and
washers.

Remove the armature segments.

Remove wave spring and detent ring from
armature hub.

Lift the armature hub away from magnet
assembly.

8. Clean the removed hardware and apply one

®

drop of Loctite

grade AA or equivalent to each

capscrew thread before installation.

Warner Electric • 800-825-9050 P-1405 • 819-0325

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