R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 33)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
33/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5.9.1.2 Brake
c_brda1b
1. Fan cover
2. Fan
3. Brake
4. Inside of the brake
5. Brake disc
6. Friction plate
7. Anchor plate
8. Fixing screws
• Lower the hook to the ground. Switch OFF the power supply to the hoist.
• Remove the protective cover of the hoisting machinery.
• Lock the rope drum with i.e. a wooden wedge, to prevent it from rotating.
!
The weight of the rope may cause the drum to rotate when the gearbox is detached.
• Remove the fan cover (1) and fan (2).
#
Do not pull the fan by the fins! Place your fingers behind the fan and carefully pull the fan off the
shaft.
• Remove the fixing screws for the brake.
• Detach the brake (3).
• Check the brake type on the rating plate fixed to the brake.
• Measure the thickness of the brake disc (5).
• Replace the brake disc if the thickness is less then the minimum thickness as according to the below
table.
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]
Tightening torque for
anchor plate screws
[Nm] / [lbf.ft]
NM39972NR# 7.00 6,6 5.0 / 3.7 5.0 / 3.7
NM38721NR# 8.00 7,6 9 / 6.6 2.5 / 1.8
NM38720NR# 8.00 7,6 9 / 6.6 2.5 / 1.8
NM38730NR# 10.40 10,1 9 / 6.6 2.5 / 1.8
NM38740NR# 11.15 10.4 22 / 16.2 5.0 / 3.7