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Mounting / Repair
35
5.4.4.3 Changing and adjusting the eccentric wheels
18
24
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), remove the old lock washer.
4. Remove the old wheel and push out the eccentric bush (18).
5. Insert the eccentric bush into the new wheel, fit the parts on the
screw (24) using a new lock washer. Slightly tighten the screw.
max.
Marking
for the
zero pos-
ition of the
eccentric
6. Align the position of the ec-
centric bush so that on turn-
ing the eccentric (18) clock-
wise, the wheel comes to the
same slideway as the one
that the old wheel was on
before dismantling.
Zero pos-
ition for the
eccentric
wheel
Rotational
direction of
the eccentric
7. Tighten the screw (24) using tightening torque Ma according to
Table 10
.
9. To check the rolling movement, make marks on the wheels using a
felt-tip pen.
10. Remove any dirt and swarf from the running surfaces of the linear
actuator.
11. 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 regu-
lated. 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.
12. Adjust the eccentric of the jockey wheel in small stages so that the carriage can be pushed
freely and without play through the HPLA profile. Jockey wheels which are adjusted too
tightly develop pressure marks which lead to running noise.
13. 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.
14. If the adjustment is correct, finish the calibration work. Otherwise repeat points 10 and 11
until the carriage adjustment is correct.
HPLA
Rigid wheel / eccentric wheel
80
7 Nm
120
20 Nm
180
70 Nm
Table 10:
Tightening torque of the wheel fastening screws
5.4.5 Installing the carriage
1. Place the carriage into the profile in the correct running direction.
2. Attach the tensioning station using 4 screws (60)
3. Attach the timing belt (chapter 5.2.2 from point 8 onwards)
4. Tension the timing belt (chapter 5.2.3, page 31)
