Epson C Series, Maintenance Manual

Page: 143 / 668

C4 Maintenance 9. Joint #5
C Series Maintenance Manual Rev.2 123
9.2 Joint #5 - Replacing the Reduction Gear Unit
A reduction gear unit consists of the waveform generator, flexspline, and circular spline. When replacing the
reduction gear unit, be sure to replace these parts all together as a set.
For details, refer to C4 Maintenance: 17. Maintenance Parts List .
Removal: Joint #5 Reduction gear unit
1. Turn OFF the Controller power.
2. Remove the Arm #4 side cover.
For details, refer to C4 Maintenance: 3. Covers .
3. Loosen the set screws of the Joint #5 motor unit and remove the
Joint #5 timing belt (6×315 mm).
Hexagon socket head cap bolts: 2-M4×15 (with a plain washer)
4. Loosen the set screws of the Joint #6 motor unit and remove the
Joint #6 timing belt (6×324 mm).
Hexagon socket head cap bolts: 2-M4×15 (with a plain washer)
Name Quantity Note
Maintenance
Parts
Joint #5 reduction gear unit 1 1539260
Tools
Hexagonal
wrench
width across flats: 1.5 mm
1
For M3 hexagon socket set screws
For M2 hexagon socket head cap bolts
width across flats: 2 mm
1 For M2.5 hexagon socket head cap bolts
width across flats: 2.5 mm
1 For M3 hexagon socket head cap bolts
width across flats: 3 mm
1 For M4 hexagon socket head cap bolts
Cross-point screwdriver 1 For covers
Wrench
width 7 1
width 8 1
Force gauge 1 For belt tension adjustment