Mounting / Repair
PLEASE NOTE: THIS IS HAUSER GERMANY MANUAL.
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34
5.4.4 Changing
individual
wheels
5.4.4.1 General
•
The procedure is the same for changing both types of wheel - plastic and steel roller gui-
dance versions. We would however point out that additional care must be exercised when
working with steel wheels.
•
The wheels of the plastic roller guidance version consist of ball bearings with a plastic
casing. The steel rollers have integrated ball bearings and spherical bearing races.
•
The ball bearings used in the plastic wheels correspond to the standard roller bearing
standards and are lubricated for life.
•
If they remain at standstill for a long time, the plastic wheels develop small flattened areas
which will completely return to shape after continuous use.
•
Both wheel types can be used in environmental temperatures of -40°C to +80°C.
Warning
It is only possible to check the wheel running during movement of the actuator.
In doing this, particular care is required, as injury is possible. If possible, only move
the actuator manually (if necessary, dismantle the motor and gearbox in advance
and lay the actuator horizontally). If not, operate the actuator at a crawl using the jog
button (speed < 1m/min).
Note
Experience and specialist knowledge is required to adjust a carriage correctly.
Therefore wheels should, if possible, only be changed by Parker personnel.
5.4.4.2 Changing and adjusting rigid (concentric) wheels
1. Remove the carriage (chapter 5.4.3)
2. Mark the position of the wheel on the carriage.
3. Loosen and remove the screw (24).
24
4. Remove the old wheel, and fit the new
one in the correct position on the carriage.
5. Insert screw (24) with screw
fastening (e.g. DELO ML5249) and
tighten using the tightening torque
Ma specified in
Table 10
page 35.
6. To check the rolling movement, make
marks on the wheels using a felt-tip pen.
7. Remove any dirt and swarf from the running surfaces of the linear actuator.
8. Insert the carriage into the profile in the correct running direction and check the wheel
adjustment along the whole of the travel. The wheels should turn along the whole travel.
Note
When adjusting the wheel play, only the wheels you have changed should be ad-
justed. If this means that a correct adjustment of the carriage is impossible, then the
carriage must be completely re-adjusted. Experience and specialist knowledge is
required for this work and it should therefore only be carried out by a Parker mecha-
nical engineer.
9. To check the pressure acting against it, prevent the wheel from turning using your index
finger; it should be possible to stop a wheel using minimal force.
10. If the adjustment is correct, finish the calibration work. Otherwise correct the wheel
adjustments.
