R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 35)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
Brake type and size Original thickness of the
brake disc
[mm]
Minimum thickness of
the brake disc
[mm]
Tightening torque for
brake fixing screws
[Nm] / [lbf.ft]
NM39340NR# 11.15 10.4 22 / 16.2
NM39351NR# 14.00 13.2 22 / 16.2
5.11 Manual brake release for hoisting motor (for brake type NM387**)
!
The manual brake release is allowed to use only in case of emergency.
!
Potential energy of load will heat up the brake rapidly. Follow the instructions for usage
carefully.
!
Faulty usage of the manual brake release can cause uncontrolled lowering of the load.
!
It is recommended to contact a service agency authorised by the manufacturer. Especially
trained personnel are able to ensure safe lowering of the load.
!
In hoists models equipped with a second brake (optional), the second brake must be
detached before installing brake release fork to the main brake.
!
In hoist models equipped with 2 hoisting motors (and thus 2 main brakes), both brakes must
be manually opened with levers simultaneously. This action requires 2 persons to carry out.
c_mobr1b
1. fork lever (assembled to hoisting motor brake)
2. lever arm
3. brake frame
A. gap, ( >1.8 mm)
5.11.1 Assembling the manual brake release
• Ensure that the fork lever (1) can move freely. Gap (A) between fork the lever (1) and brake frame (3)
must be at least 1.8 mm.
• Screw the lever arm (2) into fork lever (1).
#
In hoists with drum Ø 406mm and drum length H (1250mm) or J (1600 mm), the brake is installed
in the end of gearbox.