ABB IRB 920 Product Manual page 550

5 Repair
5.6.6 Replacing the axis-2 timing belt
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Action
Refit the axis-2 timing belt onto the pulley on the
axis-2 gearbox.
Refit the motor and refit the timing belt to the
motor.
Ensure that the belt runs correctly in the grooves.
Refit the screws and washers without fully
tightened.
Hang a strap to the motor.
Use 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.
Tip
If the ball screw will interfere with the handheld
dynamometer, adjust the ball screw manually.
© Copyright 2022 ABB. All rights reserved.
Note
xx2100001048
Screws: Hex socket head cap
screw M4x20 12.9 Lafre
2C2B/FC6.9 (4 pcs)
Washers: Plain washer machining
4.2x9x2 steel (4 pcs)
Tightening torque: 2.3 Nm ±10%
xx2100001046
Timing belt A2:
3HAC061861-001
Used belt: 64.7
New belt:70
xx2100001125
Product manual - IRB 920
3HAC075721-001 Revision: C