Epson T-B Series

T3-B T6-B Maintenance 10. Joint #2
80 T-B series Maintenance Manual Rev.1
10.2 Replacing Joint #2 Reduction Gear Units
A reduction gear unit consists of the following three parts. When replacing the reduction
gear units, be sure to always replace the elliptic cam bearing, flex gear, and internal gear all
together as one set.
For details of the parts, refer to “19. Maintenance Parts List”.
Name
Quantity
Note
Maintenance
part
Reduction gear units 1
T3-B: 1829508
Set of reduction gear
units and elliptic cam
positioning jig
T6-B: 1829510
Tools
Hexagonal
wrench
Width across
flats: 2 mm
1 For M4 set screw
Width across
flats: 2.5 mm
1 For M3 screw
Width across
flats: 3 mm
1 For M4 screw
Torque wrench
1
Cross-point screwdriver (No. 2)
1
For cross-recessed screw
Spatula
1
For applying grease
Wiping cloth
1
For wiping grease (Flange)
1
For wiping grease (Bolt)
Grease
Grease
SFB No.1
-
A brake is mounted on the Joint #3 motor to prevent the shaft from lowering down due to the
weight of the end effector while the power to the Manipulator is OFF or while the motor is
in OFF status (MOTOR OFF).
Refer to removal steps to move the shaft down to its lower limit before the replacement
procedure.
Joint #2
Reduction
gear units
Removal
(1)
Remove Arm #2 and the reduction gear units from Arm #1.
Reference: 10.1 Replacing Joint #2 Motor “Removal procedure”
(2)
Remove the
elliptic cam bearing from the Joint #2 motor.
Reference: 10.1 Replacing Joint #2 Motor “Removal procedure”

NOTE