Maintenance; Motor And Gears; Adjusting The Brake; Replacing The Position Sensor - ABB RHD8000 Series Instructions Manual

11. Maintenance

14
Contrac actuators have a robust construction. As a result, they are highly reliable
and require only little maintenance. The maintenance intervals depend upon the ef-
fective load and are therefore not specified here.
The built-in microprocessor evaluates the actual load factors (e.g. torques, temper-
atures, etc.) and derives the remaining operating time until the next routine mainte-
nance is required. Use the configuration program for viewing this information.

11.1 Motor and gears

All maintenance work must be carried out by qualified specialists who have been
trained for this task. As a rule, perform the following routine maintenance works:
- Check the shafts and gears.
- Check the motor pinion gear and the respective mating gear.
- Replace the motor's rotary shaft seal and ball bearings.
- Check the position sensor.
- Change the oil; then make a visual check and check for proper operation.

11.2 Adjusting the brake

Note that the actuator setting may be changed accidentally by the repelling power
of the valve when the brake is released!
In automatic mode the brake is permanently released. Therefore, it is not exposed
to wear and does not require any re-adjustment.

11.3 Replacing the position sensor

11.3.1 Dismounting
male connector
Fig. 13: Example shows RHD 500
- drive actuator into 50% position (refered to rated actuator stroke)
- delete the current position settings by pressing the 2 drive buttons on the LCP
for at least 5 sec
- switch-off the voltage supply
- disconnect electrically
- remove male connector
- loosen both fastening screws (1) of position sensor (fig. 14 + 15) and take sensor
out
- detach plug from sensor pcb.
plug
d0148x1