Epson LS3-401 series

Maintenance 8. Arm #4
LS Rev.10 129
U2 belt
Installation
(1)
Hold up the spline plate and set the U2
belt
around the U3 pulley.
Make sure
the gear grooves of the belt are
fit into those of the pulleys
completely.
3-M4×12
Spline Plate
Z belt
U2 belt
(2)
Hold up the spline plate and set the Z belt
around the Z2 pulley.
Make sure
the gear grooves of the belt are
fit into those of the pulleys
completely.
(3)
Loosely secure the spline plate on the Arm #2
and move
the shaft up and down
several times
before firmly secure the spline plate.
(4)
Keeping the U1
belt on the large pulley of
the Joint #4 intermediate shaft unit, set the
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.
Joint #4
Intermediate Shaft Unit
U1 belt
U2 belt
Pulley (Large)
Pulley (Small)
(5)
Loosely secure the Joint #
4 intermediate shaft unit.
Make sure
the 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.
(6)
Apply the proper tension to the U2 belt,
and then secure the Joint #4
intermediate shaft unit.
P
ass a suitable cord or string around the
Joint #
4 intermediate shaft unit near its
mounting plate.
Then, pull the cord using
a force gauge
or similar
tool to apply the specified
tension shown in the figure on
the right.
U2 belt tension:
LS3 = 69 N (7.0 ± 0.5 kgf)
LS6(a) = 69 N (7.0 ± 0.5 kgf)
LS6(b) = 102 N (10.4 ± 0.75 kgf)
3-M4×12
+ Plain Washer
U2 belt
Joint #4
Intermediate Shaft Unit
Force Gauge
To
check belt tension with the tension meter, refer to Maintenance: 8
.4 Checking the
Timing Belt Tension
(U1, U2 Belts).

NOTE