R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 32)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
32/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5.9 Hoisting motor and brake
Standard hoists are equipped with two-speed squirrel-cage motors, which are especially designed and
manufactured for hoisting duty. The motors incorporate a cylindrical rotor and class F insulation, and are
conform to the protection standard IP54/DIN40050.
Optionally, the hoist can be equipped with a inverter and specially designed motors for this duty. These
are one-speed squirrel-cage motors with increased insulation of the windings. In addition, these motors
are equipped with a speed sensor as a standard.
The hoisting brake is an electromagnetic safety brake that is closed by spring force.
c_homo1f
2
4
5
6
1
3
1. Fan cover
2. Fan
3. Brake
4. Brake disc
5. Fixing screws for motor
6. Friction plate
5.9.1 Service
5.9.1.1 Hoisting motor
• Check that the hoisting motor operates properly when loaded.
• Check for any excessive noise, vibration and/or heat.
• Clean the cooling-ribs surface when needed.