R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 5 - Manual (Page 28)

LM05 SERIES II I&M MANUAL/EN/11.30.2010
28/89
This document and the information contained herein, is the exclusive property of R&M Materials Handling, Inc., and represents a non-public, confidential and proprietary trade secret that
may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials Handling, Inc.
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.