ABB IRB 8700 Product Manual page 674

4 Repair
4.8.5 Replacing the axis-4 primary gearbox
Continued
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6
Measuring the play
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Action
Secure the gear and shims with three of
the nine M16x50 screws. Attach screws in
a triangle.
Remove the guide pins.
Action
Measure the play in three places, with a
dial gauge with magnetic base.
Note
It shall be 90° between the dial indicator
arm and the magnetic base, and 90°
between the arm to the dial indicator.
Disassemble the gear.
Use the instruction in this step and reduce
the number of shims:
Example: If the measured value is 1.14 mm
and 1.14 mm of shims are removed, it will
theoretically end up as zero. The value
must never be lower than the minimum gap
around a complete revolution or the gear.
Put shims according to the obtained
measurement and control with a micromet-
er that the value is correct.
Secure the gear with three of the M16x50
screws attached in a triangle.
Measure the play again. If the measured
result deviates too much, the gear must be
disassembled and the number of shims be
adjusted.
© Copyright 2015-2020 ABB. All rights reserved.
Note
Attachment screws: M16x50 12.9 Gleitmo
603
Tightening torque: 300 Nm
Note
Dial gauge
Micrometer
Tightening torque: 300 Nm
Product manual - IRB 8700
3HAC052853-001 Revision: M