Epson ES Series

8. Replacing the Timing Belts Part 2: Maintenance
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Installation : U2 Belt
(1) Pass a new U2 belt and the Z belt through the shaft from above, and lift the spline plate
to make those belts through.
(2) Place the Joint #3 motor unit in the arm. The motor cables should be facing Joint #2.
(3) Fit the new U2 belt around the U3 and the small U2 pulleys. And, fit the Z belt
around the Z2 and the Z1 pulleys. Ensure that the gear grooves of the belts and
pulleys engage properly.
Z belt
U2 belt
Small U2 pulley
Z2 pulley
U3 pulley
Z1 pulley
(4) Secure the spline plate with three bolts (M4×10).
(5) Position the Joint #3 motor plate, Joint #4 countershaft unit and Joint #4 motor plate
on the arm. Be careful not to slip the belts from the pulleys while maintaining proper
interval between the units. Secure them lossely for the time being using the following
bolts: 4-M4×10 for the Joint #3 motor plate; 2-M4×12 for the Joint #4 countershaft
unit; 4-M4×10 for the Joint #4 motor plate.
4-M4
×
10
2-M4
×
12
Joint #4 countershaft unit
Joint #4 motor plate
4-M4
×
10
Joint #3 motor plate