4 Repair
4.4.5. Replacement of complete lower arm
271
3HAC026876-001 Revision: C
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6-2008 ABB.
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6.
CAUTION!
The lower arm weighs 160 kg! All lifting
equipment used must be sized accordingly!
7. Lift the lower arm and move it to its mounting
position.
8. In case the hole pattern of the lower arm and
the gearbox axis 2 does not match, use power
supply to release the motor axis 2 brakes and
rotate the pinion and gear with the rotational
tool.
Connect power supply to connector
R2.MP2
•
+: pin 2
•
-: pin 5
xx0200000165
The rotation tool (A) is used beneath
the motor cover, directly on the motor
shaft as shown in figure above.
9. Disconnect the power supply, if used.
10. Secure the lower arm with 18 of the
20attachment screws and washers in gearbox,
axis 2.
20 pcs: M16 x 50, tightening torque:
300 Nm.
Reused screws may be used,
providing they are lubricated as
detailed in section
before fitting.
11. Remove the guidings and secure the two
remaining screws as detailed above!
12. Remove the lifting tool from the lower arm.
13. Refit and restore the balancing device.
Detailed in section
Refitting of
balancing device
.
14. Refit the upper arm.
Detailed in section
.
15. Perform a leak-down test.
Detailed in section
16. Refill the gearbox with oil.
.
Action
Note
Continued
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