How to Fix a Loose or Disconnected Capping Station Tube on Epson L1800, 1430, 1440, and 1390 Printers

Question

While following a guide on cleaning and repairing the capping station for Epson printers such as the L1800, 1430, 1440, and 1390, I noticed an issue with the small black tube connected to the capping station. During the process of removing the part that holds the sponge, the tube came completely out.

Now the tube is not attached to anything, and I'm unsure where it should connect or how to reinstall it properly. How can this tube be fixed or reconnected?

Answer

Let's go over what likely happened with your capping station tube and how to address it.

What the Small Black Tube on the Capping Station Does

The small black tube connected to the capping station is part of the printer's waste ink pumping system. Its job is to:

• Carry ink pulled from the printhead during cleaning cycles

• Transport waste ink away from the capping station

• Allow the pump assembly to create suction during maintenance cycles

When the printer performs a printhead cleaning, the pump pulls ink through the printhead and into this tube, which then leads to the waste ink pads or waste tubing.

If this tube becomes disconnected, several problems can occur:

• The cleaning cycle cannot generate suction

• Ink will not be pulled through the printhead properly

• The printer may develop persistent nozzle clogs

• Ink may leak inside the printer

Even though the printer might still power on and move normally, cleaning cycles will be ineffective.

Why the Tube Came Out

This commonly happens when removing the capping station sponge holder or maintenance assembly. The tube is usually connected to:

• A small barb fitting on the pump assembly, or

• A connector beneath the capping station

If the tube is pulled too far while removing the assembly, it can slip off its fitting.

Because the tubing is small and flexible, it may appear unattached if the connection point is hidden under the pump or frame.

How to Reconnect the Tube

To fix the issue, you will need to locate the pump connection point.

Typically the tube reconnects to:

The pump outlet nipple located on the capping station pump assembly.

Steps generally include:

1. Locate the pump assembly under or behind the capping station.

2. Look for a small plastic barb fitting where the tube should attach.

3. Slide the tube firmly onto the fitting.

4. Ensure the tube is pushed all the way onto the barb to prevent leaks.

5. Confirm the tube is not kinked or twisted.

Once reconnected, the pump will again be able to pull ink during cleaning cycles.

Important Things to Check

While reinstalling the tube, it's also a good idea to check the following:

1. Tube Blockage

Sometimes the tube disconnects because it is clogged with dried ink. If ink cannot pass through the tube, the pump creates pressure and the tube may pop off.

You can flush the tube using:

• Warm distilled water

• Cleaning solution

• A syringe for gentle suction

2. Pump Operation

If the pump is clogged or stuck, reconnecting the tube alone may not solve the problem. A faulty pump prevents proper suction.

Symptoms include:

• Cleaning cycles run but no ink moves

• Persistent nozzle clogs

• Ink pooling in the capping station

3. Capping Station Seal

The capping station must seal tightly against the printhead for suction to work. If the sponge holder was removed, make sure:

• The rubber cap is clean

• The sponge is properly seated

• The assembly sits level against the printhead

Helpful Video Guides

If you want to see the repair process visually, these videos may help.

Unclogging the Capping Station
(https://youtu.be/WbY_6O1-w2c)

Removing and Installing the Capping Station
(https://youtu.be/_cZEkmgIZYc)

Capping Station Maintenance Tips
(https://youtu.be/5yjq3ZN0qv8)

Repairing the Capping Station Assembly
(https://youtu.be/5UC2IMu9V90)

Rewiring or Reconnecting Capping Station Tubes
(https://youtu.be/J9im3s8UJfo)

If you are hearing unusual noises from the printer such as screeching sounds, these additional videos may help diagnose that issue:

Screeching Sound Fix Video 1
(https://youtu.be/MjArYM-QnfU)

Screeching Sound Fix Video 2
(https://youtu.be/TNOG_1TtN6g)

Detailed Full Capping Station Disassembly Guide

If you need a deeper walkthrough, we also have a detailed step-by-step video guide that shows how to completely disassemble and rebuild the capping station down to the gears.

You can find that guide here:

Capping Station Assembly and Disassembly Video Guide
(https://bchtechnologies.com/products/video-capping-station-assemble-disassemble-guide-for-l1800-1390-artisan-1430-and-1400)

This guide demonstrates the full process for printers including:

• Epson L1800

• Epson 1390

• Epson Artisan 1430

• Epson 1400

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. Therefore, we are not able to provide remote troubleshooting, direct repair guidance, or step-by-step support for printer repairs. We do offer an in-person diagnostic and repair service through our local facility: BCH Technologies Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Because demand is very high, repairs are handled on a first-come, first-served basis, and it may take several weeks before we are able to accept a printer for drop-off. Our service can cover either complete printer repairs or specific component repairs with clear instructions on how to proceed. However, we understand that our service rates may not be the most economical option. For that reason, we strongly encourage customers to explore self-help resources online.

A good place to start is YouTube, particularly our channel homepage: BCH Technologies YouTube Channel (https://youtube.com/@bchtechnologies). Use the search icon next to the About tab on the right side of the menu bar to find videos on specific repair topics. I receive dozens of questions every day asking whether a video exists for a certain issue. After creating hundreds of repair videos over the past nine years, it can be difficult to remember every topic covered. Using YouTube's search function is usually the fastest way to locate relevant videos, and the platform may also suggest helpful content from other creators.

Thanks again for reaching out and for supporting our work and videos. Your engagement helps us continue building useful repair resources for the printer community.