4 Repair
4.7.4. Replacement of gearbox, axis 4
3893HAC022033-001 Revision: K
© Copyright 2004-2011 ABB. All rights reserved.
5. Fit two new friction washers onto the guide pins. Spare part no. is specified in Required
equipment on page 387.
NOTE!
Make sure the surface beneath the
friction washers is clean and dry!
6. Push in the gearbox, axis 4, and the motor
flange.
If necessary, use screws in the attachment
holes to press in the motor flange.
Shown in the figure Location of
gearbox on page 386.
NOTE!
Make sure the motor flange is oriented
correctly by observing the oil plugs as
shown in the figure Location of
gearbox on page 386.
7. Secure the motor flange to the upper arm
housing with 16 of the 18 washers and
attachment screws.
Secure with locking liquid.
18 pcs: M10 x 40; tightening torque:
65 Nm.
8. Remove the guide pins and secure the
remaining two attachment screws as specified
in previous step.
9. Refit the motor, axis 4. Detailed in section Refitting, motor
axis 4 on page 351.
10. Refit gear Z3 to the gearbox with its gear
attachment screws.
Shown in the figure Location of
gearbox on page 386.
9 pcs: M12 x 50; tightening torque:
115 Nm.
6 pcs: M16 x 60: tightening torque:
300 Nm.
11. Replace the gasket, cover axis 4. Art. no. is specified in Required
equipment on page 387.
12. Refit the cover, axis 4 gearbox with its
attachment screws and secure with locking
liquid.
Tightening torque: 10 Nm.
Shown in the figure Location of
gearbox on page 386.
13. Perform a leak-down test. Detailed in section Performing a leak-
down test on page 246.
14. Refill the primary gearbox with oil. Further detailed in section Filling, oil,
gearbox axis 4 on page 211.
15. Refill the secondary gearbox with oil. Further detailed in section Filling, oil,
gearbox axis 4 on page 211.
16. Recalibrate the robot. Calibration is detailed in a separate
calibration manual enclosed with the
calibration tools.
General calibration information is
included in section Calibration
information on page 403.
Action Note
Continued
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