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11. Fit the three washers to be placed beneath the
3HAC026876-001 Revision: C
Action
10. Fit in the gearbox attachment holes with the
attachment holes on the lower arm with the
guide pins.
It may be necessary to turn the gear by rotating
the motor pinion with a rotation tool, motor
beneath the motor cover.
attachment screws.
12. Insert 31 of the 33 attachment screws, upper
arm into the attachment holes in the lower arm.
Do not remove the guide pins until the
attachment screws are tightened as detailed
below.
13. Secure the lower arm to gearbox axis 3, with
the attachment screws.
14. Remove the guide pins and fit the two
remaining attachment screws. Tighten them as
detailed above!
15. Disconnect the brake release voltage and
remove the rotation tool from the motor.
16. Remove the lifting devices.
17. Refit any cabling removed during the removal
process.
18. Reconnect all connectors inside motors, axis 3
and 4. Refit the motor covers.
19. Perform a leakdown test.
20. Refill the gearbox with oil.
4.4.4. Replacement of upper arm
Note
Art. no. is specified in
Required
equipment on page
261.
xx0200000165
The rotation tool is used beneath the
motor cover, directly on the motor shaft
as shown in figure above.
•
A: Rotation tool
Shown in the figure
Location of upper
arm on page
260.
Shown in the figure
Location of upper
arm on page
260.
Removing the plastic mechanical stops
may be required before fitting the upper
arm.
If guide pins are removed before the
screws are tightened, the sealing can
be involuntarily moved into wrong
position.
33 pcs: M12 x 50; 12.9 quality
UNBRAKO, tightening torque: 120 Nm.
Reused screws may be used, providing
they are lubricated as detailed in
section
Screw joints on page 390
before fitting.
Detailed in section
Performing a leak-
down test on page
188.
Detailed in section
Oil change,
gearbox, axis 3 on page
160.
Continues on next page
4 Repair
Continued
265
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