Replacing The Bellows; Rh-3Frh/6Frh/12Frh/20Frh Series - Mitsubishi Electric RH-FRH Series Instruction Manual

5 Maintenance and Inspection

5.3.5 Replacing the bellows

The following shows how to replace the bellows of the clean, oil mist, or waterproof specification robot. To replace
the bellows, refer to the relevant page for each specification.
CAUTION

(1) RH-3FRH/6FRH/12FRH/20FRH series

■ Clean specification
1) Turn off the controller's power supply.
2) Refer to Page 101, "5.3.2 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.
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) Fill the gap between the bellows fixing section and the shaft with a seal, such as a liquid gasket.
9) 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.
[Caution] When installing the No. 2 arm cover D to the No. 2 arm, please check the condition of the sealing. In the
event that the sealing material has been removed or has been bent or broken to the extent that it can -
not be return to the original form, be sure to replace the sealing material. Please inform the dealer, if
exchange is necessary.
Fixing screws of bellows
M3x8 four screws
No.2 arm
No.2 arm cover D
Fig.5-20 ： Replace the bellows (clean specification)
Maintenance and inspection procedures
5-127
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.
Set screw M4 two screws
D cut surface
Apply liquid gasket
B
cover", and remove the No.2 arm cover U and the No.2
No.2 arm
No.2 arm cover D
Ring
Apply liquid gasket
Apply liquid
gasket
30mm
Detail of D cut surface
合いマーク ABS mark
Dカット面
D cut surface
Dカット面詳細
Liquid gasket application
液状ガスケット塗布位置
Shaft
ボールネジ
M3x8 four screws
4-M3 x 8ネジ
View from B
矢視B