Epson G20 Series

Maintenance 6. Arm #2
G10 / G20 Rev.20 153
Joint #2
reduction gear
unit
Installation
(1)
A new reduction gear unit contains the
parts
shown in the picture on the right
when it is
unpacked.
(2)
Set the hole on
the circular spline and the tap
hole on the base
.
Apply
grease (SK-1A) on the gear side of the
circular spline.
Loosely
secure all bolts in a crisscross pattern so
that the bolts will be secured
evenly. Then, using
a torque wrench,
tighten each bolt securely in a
crisscross
pattern at the torque specified in the
table
below.
16-M5×25
Circular
spline
G10
G20
Item Bolt type Number of bolts Tightening torque
Joint #2 reduction gear unit
M5×25
16
10.0 N⋅m (102 kgf⋅cm)
M8×20
8
30.0 N⋅m (306 kgf⋅cm)
(3)
Apply grease (SK
-1A) on the flexspline teeth.
Set the
flexspline by aligning it with the tap hole.
Aligning the tap hole and mount the flexspline.
Align the position of
the air vent of the spacer.
If it is difficult to
align the position, move Arm
#2 from side to side
.
8-M8×20
G10
G20
Flexspline
Spacer
(4)
Apply grease (SK
-1A) inside the flexspline.
Grease volume 43 g
(5)
Apply grease to the bearing part of the waveform generator.
(6)
Execute steps from (2) to (9) in
Maintenance: 6.1 Replacing Joint #2 Motor.