NoteAction
Used belt: 51.1Use 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:90
xx2100001043
Tightening torque: 2.8 Nm ±10%
xx2100001044
Fasten the screws to the recommended tightening
torque.
7
Used belt: 308Use a sonic tension meter to measure the timing
belt tension.
8
New belt:250
If the timing belt tension does not meet the require-
ment, loosen the motor screws and readjust.
9
Refitting the pulley protection cover
NoteAction
DANGER
Make sure that all supplies for electrical power,
hydraulic pressure, and air pressure are turned
off.
1
Continues on next page
236 Product manual - IRB 920
3HAC075721-001 Revision: C
© Copyright 2022 ABB. All rights reserved.
5 Repair
5.4.1 Replacing the base
Continued
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