4 Repair
4.4.5. Replacement of complete lower arm
2973HAC023082-001 Revision: E
© Copyright 2004-2008 ABB. All rights reserved.
5.
CAUTION!
The lower arm weighs 160 kg! All lifting
equipment used must be sized accordingly!
6. Lift the lower arm and move it to its mounting
position.
7. 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.
Art. no. is specified in Required
equipment on page 293!
8. Disconnect the power supply, if used.
9. Secure the lower arm with 16 of the
18attachment screws and washers in gearbox,
axis 2.
18 pcs: M16 x 50, tightening torque:
300 Nm.
Reused screws may be used,
providing they are lubricated as
detailed in section Screw joints on
page 432 before fitting.
Shown in the figure Internal
components, lower arm on page 292!
10. Remove the guidings and secure the two
remaining screws as detailed above!
11. Refit the lower arm shaft and all additional
components, as detailed in section Refitting,
lower arm shaft on page 303!
12. Remove the lifting tool from the lower arm.
13. Refit and restore the balancing device. Detailed in section Refitting, balancing
device on page 326.
14. Refit the upper arm. Detailed in section Refitting, upper arm
on page 289.
15. Perform a leak-down test. Detailed in section Performing a leak-
down test on page 224.
Action Note/Illustration
Continued
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