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5 Maintenance and Inspection
5.3.5 Replacing the bellows
With reference to
CAUTION
1) Turn off the controller's power supply.
2) Refer to
Page 77, "Fig.5-3： Installing/removing the
arm cover D.
3) Loosen the two fixing (M4) screws of bellows, and remove the bellows to downward together with No.2 arm
cover D. Remove the liquid gasket from the rim of the screw holes before removing the screws.
4) Remove the four fixing screws which fix the bellows to the No.2 arm cover D, and removes the ring, then the
bellows can be removed from No.2 arm cover D.
5) Fix the new bellows to the No. 2 arm cover D in the same way (screw tightening torque: 0.8Nm). Fill the gap
between the No. 2 arm cover D and the bellows with a seal such as a liquid gasket.
6) Install the No. 2 arm cover D as before.
7) Fix the bellows to shaft with adjusting the position of the bellows's bottom to 30mm from end of shaft. Align
two set screws (M4) to the D cut surface and fix them securely.
8) Apply liquid gasket to the screw holes of the screws inserted in step 7).
Apply enough liquid gasket to seal the screw holes. Ensure that liquid gasket does not penetrate more than
3 mm into the screw hole.
Recommended liquid gasket: 1212 (manufactured by ThreeBond Co., Ltd.)
9) Fill the gap between the bellows fixing section and the shaft with a seal, such as a liquid gasket.
10) Sticks the attached ABS mark on the lower part of bellows. Makes the J4 axis into the position of 0 degree
by jog operation etc., and match the ABS mark sticker with ABS mark on the shaft, and stick it.
This completes the replacing bellows.
[Caution] When installing the No. 2 arm cover D to the No. 2 arm, please check the condition of the sealing. If the
sealing material has been removed or has been bent or broken, and it is not suitable to be reused, be
sure to replace the sealing material.
Maintenance and inspection procedures
5-91
, exchanges the bellows. Replacement method of bellows is shown below.
Fig. 5-13
Replace the bellows in a place where there is no risk of contamination by dust and oil
mist. If it must be replaced in a dust-filled area, be sure to remove as much dust as
possible in advance before replacing it.
cover", and remove the No.2 arm cover U and the No.2
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