ABB IRB 920 Product Manual page 876

5 Repair
5.8.1 Replacing the axis-1 gear unit sub-assembly
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Action
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 hook on 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.
© Copyright 2022 ABB. All rights reserved.
Note
Screws: Hex socket head cap
screw M4x16 12.9 Lafre
2C2B/FC6.9 (3 pcs)
Washers: Plain washer machining
4.2x9x2 steel (3 pcs)
Tightening torque: 2.8 Nm ±10%
xx2100001038
Timing belt A1:
3HAC070449-001
Used belt: 51.1
New belt:90
xx2100001043
Product manual - IRB 920
3HAC075721-001 Revision: C