ABB IRB 920 Product Manual page 506

5 Repair
5.6.5 Replacing the ball screw
Continued
3
4
Removing the upper mechanical stopper
1
2
3
Continues on next page
506
Action
Remove the screws on the lower nut to the outer
arm.
Tip
Hold the ball screw to prevent it from dropping.
Or the ball screw may be destroyed.
Raise the ball screw lower nut with the special
tool to take them out of the outer arm carefully.
Tip
Hold the lower part of the ball screw to prevent it
from dropping.
Or the ball screw may be destroyed.
CAUTION
If the ball screw nut or ball screw spline nut go
out of the screw shaft, the ball screw is destroyed.
Be careful when you do any work that may cause
this.
Action
DANGER
Make sure that all supplies for electrical power,
hydraulic pressure, and air pressure are turned
off.
CAUTION
For robots with protection type Clean Room
Always cut the paint with a knife and grind the
paint edge when disassembling parts of the robot!
See Cut the paint or surface on the robot before
replacing parts on page 118.
Remove the screw.
© Copyright 2022 ABB. All rights reserved.
Note
IRB 920 special tool:3HAC077249-
001
xx2100001088
Note
xx1800002858
Product manual - IRB 920
3HAC075721-001 Revision: C