NoteAction
xx2100001048
Refit the axis-2 timing belt onto the pulley on the
axis-2 gearbox.
2
Screws: Hex socket head cap
screw M4x20 12.9 Lafre
2C2B/FC6.9 (4 pcs)
Refit the motor and refit the timing belt to the
motor.
Ensure that the belt runs correctly in the grooves.
3
Washers: Plain washer machining
4.2x9x2 steel (4 pcs)
Refit the screws and washers without fully
tightened.
4
Tightening torque: 2.3 Nm ±10%
xx2100001046
Timing belt A2:
3HAC061861-001
Hang a strap to the motor.5
Used belt: 64.7Use a handheld dynamometer hooking to the strap
and pull the dynamometer to make the tension
falling in the allowed force range.
Note
During the measurement, make sure that all inter-
ferences that may affect the force are removed.
Pay attention to the force application direction.
6
New belt:70
xx2100001125
Tip
If the ball screw will interfere with the handheld
dynamometer, adjust the ball screw manually.
Continues on next page
928 Product manual - IRB 920
3HAC075721-001 Revision: C
© Copyright 2022 ABB. All rights reserved.
5 Repair
5.8.2 Replacing the axis-2 gear unit sub-assembly
Continued
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