4 Repair
4.7.3. Replacement of motor, axis 3
3HAC026048-001 Revision: A164
© Copyright 2006-2008 ABB. All rights reserved.
3. Fit a new o-ring to the motor. Always mount a new one, see art. no.
in section Required equipment on page
162.
4. Fit the motor, by gently lifting it straight on. Note the position of the motor! Use the
mark on the motor base, made before
removal. Also see the orientation holes
on the motor cover, shown in the figure
Location of motor, axis 3 on page 161.
5. Tighten the four screws lightly. Tightening torque: 2 Nm.
6. In order to release the brakes, connect the 24
VDC power supply to the motor.
Connect to connector R3.MP3:
• +: pin 7
• -: pin 8
7. Fit the measuring tool to the rear of the motor. See the figure below.
Art. no. is specified in Required
equipment on page 162.
8. Rotate the motor shaft several turns, using the
measuring tool.
There must always be some backlash,
meaning that the shaft should go easy to
rotate!
See the figure below.
9. Place the tip of a dial indicator against the
scribed mark on the measuring tool.
The tip of the dial indicator must
measure on a 50 mm radius from the
center of the motor shaft.
xx0200000473
A. Measuring tool
10. Set the gear play to 0.02 mm, which
corresponds to a reading on the dial indicator
of 0.13 mm.
11. Pull gently in one direction. Note the reading.
(The gear must not turn.)
See the figure above.
12. Then gently knock on the tool in the other
direction and note the reading. The difference
in reading = gear play. The gear play should be
0.02 mm which corresponds to a reading on
the dial indicator of 0.13 mm.
See the figure above.
13. Tighten the four motor attachment screws. 4 pcs. Tightening torque: 23 Nm.
Action Note/Illustration
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