EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Disassembly & Assembly Disassembly Procedures 259
4.2.6.3  Mount Assy., Plate, Motor, ASF, SP
1. Remove "Box Assy., Flushing / Pump Unit" (p316).
2. Detach E-ring and then remove "Spur Gear, 16".(Refer to Figure 4-70.)
Figure 4-70. Spur Gear, 16 Removal
E-ring
Spur Gear, 16
Screwdriver 
insertion hole