NoteAction
xx2000001155
Release the holding brake by pressing the button
on the internal brake release unit.
3
Move the outer arm to a position where the axis 3
can be moved in full stroke.
4
xx2000001155
Press the brake release button and move the shaft
to its upper and lower limits manually.
5
xx2000001158
Visually inspect:
• the stop blocks on the ball screw spline unit
• the shaft of the ball screw spline unit
Look for abrasions, cuts or crush damages on the
spline, and grease amount on the shaft.
6
See Lubricating the ball screw
spline unit on page 106.
Apply grease to the shaft if it is not enough.7
See Replacing the ball screw on
page 488.
Replace the ball screw spline unit if wear or dam-
age is detected.
8
96 Product manual - IRB 920
3HAC075721-001 Revision: C
© Copyright 2022 ABB. All rights reserved.
4 Maintenance
4.4.3 Inspecting the ball screw spline unit
Continued
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