ABB IRB 660, Product Manual, Page: 291 / 362

Note Action
See the previous figure! Insert two screws, M12x50 in the holes to
neutralize the spring force. Screw in the
screws until they have proper contact with
the cylinder inside.
11
The length of the cylinder is now locked
and the balancing device is unloaded. It
should now be possible to easily rotate the
balancing device.
DANGER
Turn off all:
• electric power supply
• hydraulic pressure supply
• air pressure supply
to the robot, before entering the robot
working area.
12
Detailed in section Draining, axes 2 and 3
on page 128 .
Note
Time-consuming activity!
Drain the gearbox. 13
Remove the motor cables of axis-2 or axis-
3 motor, depending on which gearbox is
being removed. Protect the cables from
getting damaged and from oil spill. 14
Remove one gearbox at a time! 15
Detailed in section Replacing motors, axes
2 and 3 on page 258
Remove the axis-2 or axis-3 motor, depend-
ing on which gearbox is being removed. 16
xx1000001405
Remove all remaining attachment screws
that secure the gearbox to the lower arm
system.
Axis 2: M16 and M12.
Axis 3: M12.
17
Continues on next page
Product manual - IRB 660 291
3HAC025755-001 Revision: W
© Copyright 2006-2020 ABB. All rights reserved.
4 Repair
4.7.2 Replacing the gearbox, axes 2- 3
Continued