4 Repair
4.3.3. Replacement of complete arm system
3HAC022032-001 Revision: E130
© Copyright 2004-2008 ABB. All rights reserved.
5. Move the upper arm into a resting position against
the lower arm.
Lock the upper arm in this position with securing
slings around the lower and upper arm (A), as
shown in the figure to the right.
Note! If the arms are not properly secured, the
upper arm may move during the lift and cause a
drop of the complete arm system.
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Note! The figure shows the IRB
4400.
The same position of the upper
arm resting against the lower
arm, should be applied for the
IRB 4450S.
6. Unload the weight of the arm system with lifting
slings and a crane.
7. Remove the balancing device. Detailed in section
Replacement of balancing
device on page 172.
8. Remove the parallel arm. Detailed in section
Replacement of parallel arm /
Replacement of bearing on
page 168.
9. Remove the attachment screws and friction
washers, lower arm.
Shown in the figure Location of
complete arm system on page
128.
10. Lift away the complete arm system.
Make sure the upper and lower arm are properly
secured to each other during the lift.
Action Info/Illustration
Continued
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