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U1 belt
(1) Keeping the U1 belt on the large pulley of the Joint #4 intermediate shaft unit, set the
Installation
NOTE
(2) Loosely secure the Joint #4 intermediate shaft unit.
(3) Apply the proper tension to the U2 belt, and
NOTE
LS10-B Rev.6
U2 belt in the Arm #2 on the small pulley and put them on the Arm #2 upper surface.
Make sure the gear grooves of the belts are fit into those of the pulleys completely.
Make sure the motor unit can be moved by hand, and it will not tilt when pulled.
If the unit is secured too loose or too tight, the belt will not have the proper tension.
then secure the Joint #4 intermediate shaft unit.
Install the tensioner in front of the Joint #4 motor
unit. Rotate the hexagonal bolt of the tensioner
and push the plate to apply the specified tension.
U2 belt tension: 102 N (10.4 ± 0.5 kgf)
(3)-1
Loosen the nut and turn the bolt. Push in the Joint #3 motor unit.
(3)-2
After fixing the Joint #3 motor unit, turn the bolt to leave from the plate.
(3)-3
Check the tension using the sonic tension meter.
For details, refer to Maintenance 7.4 Checking the Timing Belt Tension.
(3)-4
Repeat the steps (3)-1 through (3)-3 until you get appropriate tension.
(3)-5
After the adjustment, put the bolt back to its original position and fix it with
the nut.
To check belt tension with the tension meter, refer to Maintenance: 8.4 Checking the
Timing Belt Tension (U1, U2 Belts).
Maintenance 8. Joint #4
Joint #4
Intermediate Shaft Unit
U1 belt
Pulley (Small)
Plate
ボルト
Tensioner
3-M4×12
+Washer
Pulley (Large)
U2 belt
Bolt
Nut
129
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