I removed those tubes at the expansion valve in my 1985 300D a few months ago, using regular wrenches (big open-ended HF & thin adjustable wrench). I removed the expansion valve too. The task was to replace the bigger suction hose since it was leaking thru the rubber, but I changed all O-rings at the same time. I have a recent thread on how I replaced the hoses. I didn't replace the small "liquid" tubes since they looked fine and rarely fail.

I am about to do the same on my 1984 300D. I started on the broken oil pump tensioner, but those hoses were in my way and looked ready to fail, so figured "why not now" and also eliminate that cumbersome tube run behind the alternator.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans