Suggestions Cross contamination SP-300V

trying to figure out why the yellow damper is getting magenta in it.
I have replaced the dampers a few times along with New Roland cap tops.
My printer is sitting perfectly level. I have always used Roland Inks.

One question when I replace the damper I always pull the ink through the hole on the bottom where it conects to the manifold nipple. Should I be pulling from the hose on the cap tops with the heads parked in place.

Also wondering if the capping station is now working properly.

Jim

 

It took me some time but I have finally fixed the cross contamination problem.

I changed the damper and replaced it along with the rubber O ring for damper. I also cut off a short section of the tubing before installing the new O ring.
I pulled ink into damper with a tapered syringe from the bottom of the damper.

New Roland cap top along with a good cleaning of the scrapper and the wipers.

Next I noticed ink being held in the magenta and yellow cap top so I removed the hose under the cap top at the Y connection and out came the ink.
I changed everything from the drain tank, hoses, and ever the Y connector.

Next I removed the ink pump and even thought it looked fine I took the whole thing apart and flushed the lines out good.

The ink pump is such a simple thing to work on and there really is not a great deal that can go wrong with it other then the motor.

Once I had everything back together I have no more problems with cross contamination and the tests prints look very good.

When you have a problem with cross contamination it really takes a lot of time to simply check all many small parts that can be the reason for the problem.

For such an expensive printer it's amassing to me how much trouble one small air leak can cause and stop everything from working correctly.

Jim