R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 16-20-25 - Manual (Page 26)

LM16-20-25 I&M MANUAL/EN/11.30.2010
26/73
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.
NOTE: MAXIMUM ALLOWABLE GAP IS 0.5mm or 0.020 inches. Remove round plastic dust
cap on the side of the brake assembly. Turn off power to hoist, insert gage pin of proper
diameter to check motor brake gap. Recommend that a gage pin set be available with
increments of 0.001” ranging from 0.015” to 0.020”.
The air gap of the brake cannot be adjusted. If the brake air gap is measured above maximum
allowable, then he linings must be replaced.
Gap may be measured periodically to predict replacement based upon frequency of use.
Replace the friction rotor when the gap reaches the maximum allowable dimension.
Removing Hoist Motor Brake (Refer to Figures 9 and 10)
1. Remove load from load block assembly.
2. Raise load block assembly to hoist body. Allow slack in chain to permit tying up bottom block
assembly to remove weight of bottom block assembly from load chain.
3. Remove and lockout power to the hoist.
4. Remove three-sided branding cover.
5. Remove three (3) screws (item 1- figure 9) and take off Brake and Fan Cover (item 2-figure 9).
6. Remove lock collar (see Figure 10) and remove fan. If needed, use two screwdrivers under hub to
pry fan loose.
7. Remove second retaining ring and pull out spacer.
8. Remove brake coil leads from terminals inside hoist electrical control enclosure.
9. Loosen brake cable gland and pull out brake cable as necessary.
10. Remove three (3) screws – Figure 10 - from brake magnetic assembly. Remove brake magnetic
assembly.
11. Remove motor brake friction rotor – item 3 – Figure 10.
12. Remove three (3) screws – item 7 – Figure 10 and remove wear plate item 8 – Figure 10.
Installing Hoist Motor Brake (Refer to Figures 9 and 10)
1. Check the voltage of the motor brake assembly. It must match the voltage of the motor.
2. Attach wear plate – item 8 – Figure 10 to hoist motor end flange and tighten three (3) screws item 7 –
Figure 10 to recommended tightening torque – 6.6 lb-ft [9Nm].
3. Slide friction rotor (item 3 – Figure 10) onto brake hub (item 4 – Figure 10).
4. Mount magnetic brake assembly (item 1 – Figure 10) and tighten three (3) screws (item 6 – Figure
10) to recommended tightening torque – 6.6 lb-ft [9 Nm].
5. Insert spacer and install snap ring into groove just above spacer.
6. Mount fan (item 4 – Figure 9) and install lock collar just above fan hub.
7. Insert motor brake leads through brake cable gland on electrical control enclosure and reconnect
motor brake leads. Tighten motor cable gland.
8. Mount end cap and tighten three screws. (Do not over-tighten.)
9. Replace branding cover.
10. Turn on power.
11. Free the bottom block and make certain load chain is not twisted
12. Perform no-load test and load test per Sections 9 and 10 respectively.