R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 55)

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.
• Detach the motor from the gearbox.
• Re-assemble in the reverse sequence.
5.21 MF07 and MF10 Travelling motor
1 2
4 5 6
3
7 8
1. Fan cover
2. Fan / Flywheel
3. Fixing screws for motor
4. Brake
5. Brake disc
6. Friction plate
7. Rectifier
8. Power supply plug
5.21.1 Removing DC-brake and inspection of brake friction disc
• Ensure there is no danger of live voltage.
• Remove the power supply plug (8) for the travelling machinery.
• Open the motor cover (1).
• Remove the fan (2).
• Unscrew the brake fixing screws.
• 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 it has worn thin.
Brake type and size Min. thickness of
brake disc
Tightening torque for
brake fixing screws
NM38770NR#, 16 Nm 6.8 mm 5 Nm / 3.7 lbf.ft
NM38771NR#, 8 Nm 6.65 mm 5 Nm / 3.7 lbf.ft
NM38720NR#, 21 Nm 7.6 mm 9 Nm / 6.6 lbf.ft
• Re-assemble in the reverse sequence.
!
Tighten the fixing screws of the brake to the correct tightening torque.