4 Repair
4.4.4. Replacement of upper arm
2773HAC026876-001 Revision: F
© Copyright 2007-2010 ABB. All rights reserved.
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.
Art. no. is specified in Required
equipment on page 273.
xx0200000165
The rotation tool is used beneath the
motor cover, directly on the motor shaft
as shown in figure above.
• A: Rotation tool
11 . Fit the three washers to be placed beneath the
attachment screws.
Shown in the figure Location of upper
arm on page 272.
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.
Shown in the figure Location of upper
arm on page 272.
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.
13. Secure the lower arm to gearbox axis 3, with
the attachment screws.
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 the
section Screw joints on page 405
before fitting.
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. Detailed in section Performing a leak-
down test on page 196.
20. Refill the gearbox with oil. Detailed in section Oil change,
gearbox, axis 3 on page 171.
Action Note
Continued
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