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Maintenance and Troubleshooting
8.1.2
Adjusting the Air Gap
Use the following procedure to adjust the air gap. Any part numbers referenced refer to
Figure 2 Brake Parts List.
1.
Loosen but do not remove the socket-head screws connecting the magnet (1) to the
mounting surface. Loosen just enough to remove pressure on the adjusting spacer.
2.
Turn the adjusting spacers (1.2) to move away from mounting surface and into magnet
assembly. Rotate each adjusting spacer about 1/2 turn, adjusting all spacers the same
distance.
3.
Insert feeler gauge at the correct gap thickness of X between the armature plate and
magnet assembly. This is best done near the adjusting spacer.
4.
Tighten the socket-head screws until pressure is felt on the feeler gauge.
5.
Ease off pressure on the socket-head screws so you can still move the feeler gauge.
6.
With feeler gauge inserted, turn the adjusting spacer to move toward the mounting
surface and out of the magnet assembly until snug against the mounting surface.
7.
Repeat steps 3-6 at three locations around the perimeter of the magnet assembly to
ensure uniform air gap width.
o
o
8.
Test the air gap with a feeler gauge during this adjustment process. Continue adjusting
the spacers until the air gap is at X, as shown on the table in the previous section.
o
9.
If the air gap cannot be adjusted to below Xn, or if the friction lining falls below the
minimum permissible thickness Gmin, the friction lining should be replaced.
10.
Once the air gap is adjusted, check the socket-head screws to ensure they are secure,
and return the brake to operation.
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2021 KEB America, Inc.
©
Figure 18 Adjust the Air Gap
The air gap must be uniform around the entire brake circumference.
If one spacer is tight or lose it means you do not have the spacers all level.
The ideal air gap is width X, but if you cannot adjust the air gap to that width,
the brake will continue to function as long as the air gap is below Xn.
See Installing the Brake for details.
45
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Table of Contents
Troubleshooting
