Epson LS20-B Series

Maintenance 10. Ball Screw Spline Unit
150 L
S20-B Rev.4
10.2 Replacing the Ball Screw Spline Unit
A brake is mounted on the motor of Joints #3 and #4 to prevent the shaft from moving down
and rotating 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.
Name
Qty.
Note
Maintenance
part
Ball Screw Spline Unit 1
1646487: For LS20-B*04S
1646488: For LS20-B*04C
Grease
For Ball Screw Spline Unit
(AFB grease)
Proper
quantity
Tools
Hexagonal
wrench
width across flats: 3 mm
1
For M4 screw
width across flats: 4 mm
1
For M5 screw
Torque wrench
1
Nippers
1
For cutting wire tie
Cross-point screwdriver (#2)
1
Wiping cloth 1
For wiping grease
(Spline shaft)
Material
Wire tie
-

NOTE