Motor; Motor Removal; Motor Shaft Sealing Ring - ABB PME120-AI Service Instruction

12 PME120-AI / PME120-AN (Contrac) ELECTRICAL ROTARY ACTUATOR | SEI/PME120-EN REV. A
... 5 Maintenance

Motor

PME120 uses an integrated motor. The stator is integrated into
the actuator housing which makes the motor housing a part of
the actuator housing.

Motor removal

DANGER
Danger to life due to unexpected movement of the actuator!
Note that the actuator position may be changed accidentally
by the external load on the drive when the brake is released, or
the motor is removed.
NOTICE
Material damage
The lower end of the stator shaft is supported by 2 separated
disk springs. Make sure you get them out
with the motor.
Figure 12: Rear view of PME120 (without cover / electronics)
Figure 13: Brake body with rotor
1. Remove the rear cover (cover with electronics at PME120-AI).
2. Unscrew the 4 motor fastening screws
3. Loosen the 4 grub screws
4. Take the brake body with rotor out
5. Take the stator 4 out.
1 .
2 .
3 .

Motor shaft sealing ring

Removal
Figure 14: Removal
The motor shaft sealing ring prevents the oil in the gearbox to
penetrate into the motor housing.
Once the stator is out, use two appropriate hooks
out; see Figure 34.
motor sealing ring 2
1 to pull the