Pete I believe he means Sqirter tubes not the emulsion tubes. The squirter tubes just pull straight out with a pair of but are very fragile and are typically damaged or broken during removal so be sure you have new ones to replace them. Someone probably has a better idea than me but this has been my experience.
Here is some great info from a real expert,Charlie NY.
You might mention feeding a piece of tag wire thru the outlet end of the J tubes....very carefully...using a small pair of needle nose pliers. Soaking overnight in gas or lacquer thinner then a shot of air thru a small nozzle. As you know the inlet end is of the j tube is staked in place with a split tapered lock.....not
ez to remove. Or send it to me.