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10.
Remove the powder fill screw (and washer for GBA, GBAM, GBB & GBBM only) from the right
stator. For all other models remove the blind rivet.
NOTE: Discard all bearings, powder seals, gaskets, snap rings and magnetic powder. These
parts must be replaced, and are included in the repair kit.
RE-ASSEMBLY
IMPORTANT: Re-assembly of the brake must be performed in a clean, dry area. The brake
components must be cleaned with solvent, and must be dry and totally free of grease and oil.
Grease or oil on brake parts will cause failure when the unit is rebuilt.
CAUTION: Do not immerse the coil in solvent.
1.
Install the internal snap rings in the stators.
2.
Press the new powder seals into the left and right stators. The powder seals will bottom on the
internal snap rings.
NOTE: The seal lip must face toward the inside of the brake.
3.
Support the rotor on a bench with the cross-drilled holes facing down. Wrap a 6" x 6" (152 mm x
152 mm) piece of stiff paper, thin plastic, or shim stock around the rotor shaft forming a sleeve.
This will allow the powder seal to slide over the end of the rotor shaft and the external snap ring
groove.
4.
Slide the left stator and powder seal over the thin sleeve until it bottoms on the rotor. Pull the
sleeve off the end of the rotor shaft.
5.
Press one bearing onto the end of the rotor shaft until it seats against the internal snap ring of the
left stator.
NOTE: The seal side of the bearing must face the inside of the brake.
6.
Apply 2 or 3 drops of wicking Loctite to the inner and outer race of both bearings. Wait ten seconds
and wipe off the excess Loctite.
7.
Install the external snap ring on the rotor shaft.
8.
Turn this assembly over.
9.
Install the left side coil gasket.
NOTE: For Models GBA, GBAM, GBB AND GBBM: Install the coil gasket into the slot in the left
stator. Insure that the coil gasket is evenly seated all the way around the stator slot.
NOTE: For Models GBC, GBCM, GBD and GBDM, GBE and GBEM: Install the coil gasket into the
slot in the coil bobbin. Insure that the coil gasket is evenly seated all the way around the bobbin
slot. Use a few drops of instant adhesive to keep gasket from moving during assembly.
10.
Place the coil into the left stator with the leads exiting through the slot into the junction box.
11.
Install the right side coil gasket.
NOTE: For Models GBA, GBAM, GBB AND GBBM: Install the coil gasket into the slot in the right
stator. Insure that the gasket is evenly seated all the way around the stator slot.
NOTE: For Models GBC, GBCM, GBD AND GBDM, GBE and GBEM: Install the coil gasket into
the slot in the coil bobbin. Insure that the coil gasket is seated evenly all the way around the bobbin
slot. Use a few drops of instant adhesive to keep gasket from moving during assembly.
4
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