LM05 SERIES II I&M MANUAL/EN/11.30.2010
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Copyright © (2010) R&M Materials Handling, Inc. All rights reserved.
7.3.3 Hoist Motor Brake Adjustment (See
Figure 11
)
If maximum air gap of brake has been reached or will be exceeded before next inspection, readjust air gap.
Minimum air gap
Maximum air gap
X = 0.008” [ 0.2 mm ]
X = 0.020” [ 0.5 mm ]
Before adjusting brake, remove load. Per ANSI Z244.1, lockout and tag main disconnect switch in de-
energized position. Follow other maintenance procedures outlined in this manual and ASME B30.16.
1. Remove brake cover and gasket.
2. With a feeler gauge, check three (3) places near each mounting bolts to measure air gap ( X )
between brake thrust disc (item 2) and coil (item 1).
3. To adjust air gap use a 0.008” feeler gauge and proceed as follows:
Loosen locking screw (item 5).
Adjust the air gap by turning the brake adjusting nut (6) counterclockwise to reduce the air gap;
turn clockwise to increase it.
Tighten the locking screw (5).
Make the same operation with the 2 other adjustment points.
Control the air gap adjustment all around the magnet.
4. Check brake operation. Run load block up and down several times without a load to test operation
of brake. Then, lift a capacity load about one foot above floor, stop, and check that brake holds
load.
5. Install gasket and brake cover.
