Epson ES Series - Replacing the U1 Belt

Part 2: Maintenance 8. Replacing the Timing Belts
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8.2 Replacing the U1 Belt
Removal : U1 Belt
(1) Open the arm top cover and arm bottom cover. (Refer to chapter 2. Opening the
Covers.)
(2) Loosen the four bolts (M4×10) holding the Joint #4 motor plate.
(2) 4-M4
×
10
(3) 2-M4
×
12
Joint #4 countershaft unit
Joint #4 motor plate
(3) Loosen the two bolts (M4×12) holding the Joint #4 countershaft unit.
(4) Remove the U2 belt from the small U2 pulley (the lower side).
U1 belt
Small U2 pulley
Large U2 pulley
U2 belt
(5) Remove the U1 belt from the large U2 pulley (the upper side).