ABB RHD Series - Motor Disassembly; Assembly

RHD250 to 4000 (Contrac) ELECTRICAL ROTARY ACTUATOR | SEI/RHD250/4000-EN REV. A 15
Motor disassembly / assembly
Motors without fan on rear shaft end
1
Brake cover screw
2
Cover
3
Brake fastening screw
Figure 14: Brake cover removal (I); example shows motor of series 1
Additionally remove the brake for motor ball bearing
replacement.
1. Undo brake cover screws
1 and put cover 2 aside.
2. Disconnect the two cables.
3. Undo the brake fastening screws
3 and put brake body with
disk aside.
1
Retaining ring plier
2
Retaining ring
3
Brake pinion
Figure 15: Brake removal (II); example shows motor of series 1
4. Use an appropriate retaining ring pliers
1 to get the
retaining ring
2 for the brake pinion 3 out.
5. Pull the brake pinion
3 from the shaft.
1
Key
2
Flange screw
3
Extraction tool
Figure 16: Removal of the motor flange; example shows motor of series 1
6. Remove the drive pinion.
7. Pull the key
1 out of the motor shaft.
8. Undo motor flange screws
2.
9. Use an appropriate extraction tool to pull the flange from the
stator housing (see Figure 16).