Maintenance and Troubleshooting
©
2021 KEB America, Inc.
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8 Maintenance and Troubleshooting
CAUTION
Moving parts can crush or cut!
Before performing maintenance or troubleshooting the brake,
mechanically secure the load against unintended movements. Extra
care should be given for vertical applications i.e. lifts, cranes,
winches.
8.1 Maintenance
The COMBISTOP type 38 brake is almost maintenance-free. As a result of wear
occurring during operation, the air gap between magnet and armature increases and the
friction lining wears away.
The air gap should be checked at routine maintenance intervals. If the air gap is
measured larger than the maximum air gap Xn, the air gap should be re-adjusted to the
nominal air gap X, or as close as possible. If the air gap cannot be adjusted to within Xn
by the re-adjustment procedure, the friction lining should be replaced and the air gap
adjusted again.
The following sections describe checking and adjusting the air gap and replacing the
friction lining.
8.1.1 Checking the Air Gap
The air gap between magnet and armature should be checked at routine maintenance
intervals, and when installing the brake.
The operational air gap width is denoted X, while the maximum air gap is denoted Xn.
Figure 16 Checking the Air Gap
1.
Using a feeler gauge (F) check the air gap X. If the air gap is larger than Xn, the air gap
must be readjusted to X.
