ABB IRB 920 Product Manual page 107

Lubricating the ball screw spline unit
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Product manual - IRB 920
3HAC075721-001 Revision: C
Note
For robots with protection type Clean Room
For robots with protection class IP54
First remove the upper bellow and lower bellow according to
bellows on page 421.
Then, use this procedure to inspect the ball screw spline unit.
Note
Cover the end effector and peripheral equipment in case the grease drips, before
lubricating the ball screw spline unit.
Action
Turn on the electric power supply to the robot.
If the robot is not connected to the controller, power
must be supplied to the connector R1.MP according
to the section Supplying power to connector R1.MP
on page 64.
DANGER
When releasing the holding brakes, the robot axes
may move very quickly and sometimes in unexpec-
ted ways!
Make sure the payload is disassembled or tooling
is properly supported; otherwise, fast downward
movements of axis 3 may cause severe hits.
Release the holding brake by pressing the button
on the internal brake release unit.
Move the outer arm to a position where the axis 3
can be moved in full stroke.
Move the shaft manually to its upper limit while
pressing the brake release button.
Wipe off old grease from the shaft.
Apply new grease and fill the grooves. Wipe off
excessive grease.
Move the shaft manually to its lower limit while
pressing the brake release button.
Wipe off old grease from the shaft.
Apply new grease and fill the grooves. Wipe off
excessive grease.
Move the shaft up and down several times while
pressing the brake release button to smooth out
the grease on the shaft. Wipe off excessive grease.
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4.6.1 Lubricating the ball screw spline unit
Note
4 Maintenance
Continued
Replacing the
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