Replacing The Brake And Rotor; Adjusting The Nominal Braking Torque And Replacing The Springs - Danfoss VLT OneGearDrive Instruction Manual

Service and Maintenance

4.1.1 Replacing the Brake and Rotor

All work can only be carried out by qualified technical
personnel on a stationary machine, which has been
protected against restarting. This also applies to auxiliary
circuits.
4 4
4.1.1.1 Figure
10
9
8
7
Figure 4.1 Brake and Rotor
4-2
®
VLT OneGearDrive Instruction Manual
2
1
11
MG75C322 - VLT
1 Rotor width, minimum 0.217 in [5.5 mm]
2 Air gap, maximum 0.018 in [0.45 mm]
3 Fastening screws
4 Armature plate
5 Magnet
6 Springs
7 Hub for rotor
8 Rotor
9 Friction Plate
10 Hollow screws
11 Brake Cover and nuts
Table 4.2 Legend to Figure 4.1
3
4
1. Open the brake completely by turning the brake
cover nuts (11) counter-clockwise.
2. Loosen the fastening screws (3) completely by
turning them counter-clockwise.
3. Remove the installed brake and rotor from the
hub of the rotor (7).
4. Assemble the new brake and rotor on the hub of
the rotor (7).
5. Tighten the fastening screws (3).
6. Close the brake cover and tighten the covering
5
nuts.
CAUTION
Even after the exchange of the rotor, the complete braking
torque will only be effective after the brake linings at the
6
rotor have been run in.
Check the brake cover seal before closing it and exchange
the seal if any damage is detected.
4.1.2 Adjusting the Nominal Braking
Torque and Replacing the Springs
The nominal braking torque can be adjusted and broken
springs can be replaced. Follow the instructions in
4.1.1 Replacing the Brake and Rotor to open the brake as
reference for the nominal braking torque:
Nominal braking torque in Nm
10
7
6
4
Table 4.3 Nominal Braking Torque
®
is a registered Danfoss trademark
Number of springs
7
5
4
3