Epson LS-B Series Maintenance Manual page 333

Joint #4 (1) Remove the Joint #4 motor unit from the Arm
Reduction Gear
Unit
Removal
(2) Remove the screws mounting Joint #4 motor
(3) Remove the U pulley and U housing.
(4) Remove the plate.
LS-B series Maintenance Rev.1
#2.
For details, refer to the Installation steps in
8.2 Replacing the Timing Belt.
unit on the reduction gear unit.
Remove the cover of the hole for fixing the
extension shaft on the side of the reduction
gear, and loosen the screws.
If the screw position does not match, turn the motor slightly and move until the screw
fixing the extension shaft can be seen.
Remove Joint #4 motor unit from the reduction gear unit.
Mount the cover of a hole for fixing the extension shaft on the side of reduction gear
unit.
Pull the motor unit upward to remove.
LS20-B Maintenance 8. Joint #4
3-M3×12
+ Plain Washer
Joint #4 Motor
Joint #4
Reduction Gear Unit
Hole for fixing the
extension shaft
4-M4×10
U Housing
Joint #4
Reduction Gear Unit
U Pulley
6-M4×15
4-M4×20
Plain Washer
Joint #4
Reduction Gear Unit
Plate
319