Does anybody know what the line sizes are for a Trane TTR030? I have to go to a friends house about an hour from home, and I think the aeroquip fittings are leaking. I want to make sure that I have the right size couplings. (I no longer run service.) I'm guessing 3/8 & 3/4, but maybe someone knows. I never put in Trane, so I don't know.