EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Disassembly & Assembly Disassembly Procedures 322
4.2.8.7  Guide, Waste Ink
1. Remove "Pump Unit". 
(Refer to "4.2.8.6 Box Assy., Flushing / Pump Unit" (p316).)
2. Remove the "Guide, Waste Ink" by following the steps below.
2-1. Push up the "Guide, Waste Ink" from the printer bottom surface to 
free the dowel from the frame.
2-2. Release the two tabs by pulling toward the rear of printer and then 
remove the "Guide, Waste Ink".
Figure 4-162. Guide, Waste Ink Removal
Dowel
Tabs
Step 2-1Step 2-2
Guide, Waste Ink RearwardForward