Epson LS20-B Series

Maintenance 8. Joint #4
LS20-B Rev.4 141
8.4 Replacing the Reduction Gear Unit
Name Qty. Note
Maintenance
part
Reduction Gear Unit 1 1493783
Tools
Hexagonal
wrench
width across flats: 3 mm 1 For M4 screw
width across flats: 4 mm
1
For M5 screw
Spanner
width across flats: 7 mm 1
For M4 hexagon head bolt
and M4 hexagon nut
Cross-point screwdriver (#2)
1
For M4 screws
Torque wrench
1
Sonic tension meter
1
Refer: Unitta U-508
Material Wire tie - For binding cables
The brakes are mounted on the Joints #3 and #4 to prevent the shaft from moving down due
to the weight of the end effector while the power to the Controller is OFF or while the motor
is in OFF status (MOTOR OFF).
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.

NOTE