5 Inspection and maintenance
LS Open Loop Vector Motor 4H42, 4H71, 4H72 Manual Supplement
za-o.2.8.41-us-1.1
August 2022
Page 20
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We cannot recommend cleaning the rotor / friction linings because oil / grease has usually
worked into the lining and this can only be removed from the surface area to a limited
degree.
Furthermore, it is not possible to fully exclude negative reactions between the cleaning
products and the lining. We therefore recommend use of the spare parts kit here.
7.
Check friction surfaces for wear and clean with a damp cloth.
8.
Slide a new brake rotor (8) onto the hub (7) and check the available clearance.
NOTICE
Danger of damage
→
If increased clearance is present in the gearing between the brake rotor (8) and
hub (7), remove the hub (7) from the motor shaft and replace it. Be sure to consult
the production factory before removing the hub (7).
9.
Replace the hoist motor brake pressure springs (see
Replacing the pressure
springs
section).
10.
Check the O-ring of the coil carrier for damage and replace if necessary.
11.
Clean coil carrier.
12.
Assemble in reverse order (work steps 6 to 1).
→
Make sure that the inspection hole for the air gap measurement is at the bottom.
→
Tighten the fastening screws (5) to the prescribed tightening torque, see table.
→
After tightening the fastening screws (5), mark the fastening screws (5).
Hoist motor brake type
Fastening screw (5) tightening torque
[Nm]
RSM 16
9.0
RSM 32
RSM 60
22.0
13.
After completing the assembly work, check the hoist motor brake and carry out a
conditioning of the friction pairing, see
Conditioning of the friction pairing
section.
Summary of Contents for 4H42
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