5Maintenance and Inspection
Maintenance and inspection procedures 5-70
(2) How to Replace the Bottom Bellows
and replace the top bellows.
1) Turn off the robot controller's power supply.
2) Remove the installation screws (three M4 screws) of the No. 2 arm cover-L <3>.
3) Loosen the two M4 set screws installed beside the part <4>, 30 mm above from the bottom edge of the ball
screw, and remove the bottom bellows from the No. 2 arm cover-L.
4) Remove the screws (four M3 x 8 screws) of installation part <5> of the bellows, and remove the bellows.
5) Install the new bellows (four M3 x 8 screws、 Tightening torque 0.8Nm)
6) Align part <4> to 30 mm above the bottom edge of the ball screw, and tighten the M4 set screws (two
pieces) adjusting to the D cut surface.
7) Install the No. 2 arm cover-L <3> with the M4 screws (three pieces).
8) Fill the clearance between part <4> and the ball screw with the liquid gasket described in
. or similar material.
[Note] Check the condition of the sealant when installing the No. 2 arm cover-L onto No. 2 arm. Be sure to
replace the sealant if it is dislocated and bent or crushed and does not return to its original shape.
5-5 ： Consumable part list" on page 75
provides a list of names of Norseal types.
Fig.5-12 ： Replace the top bellows
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.
（3-Ｍ4 screw）
30mm
B
<5>
<4>
4-Ｍ3 ｘ 8 screw
<3> No. 2 arm cover-L
M4 set screws x 2
Bottom bellows
<1>
<2>
4-M3 x 8 screw
Section B
Ball screw
Liquid gasket coating position
30mm
Details of D cut surface
D cut surface
CAUTION
