I'm not going to flush, no need for it. So had some problems that I corrected. The O rings supplied with the fittings were to small. I wasn't holding a vacuum. Larger O rings took care of that. Yes, I used the green ones. I got the heater shut off all the way now. I didn't realize it was on. The valve was open just a little bit. I thought the heat was from the inside of the cab. Now with the A/C off, it blows cool air, not hot any more. That would screw up the charging. Got the scale for about $70. Nice scale to. So on to a weighed charge in a few days. I'm not driving the truck, just sitting in the garage with the gages and a vacuum till I can get to it.
