Any A/C machine guru's in here?
Just picked up a well used Robinair 34788 for pennies. Seller claimed it worked but honestly it was cheap enough even if I have to take it to an authorized Robinair repair center I'll still be ahead. Ive always wanted an ac machine and have really needed one lately. Ive cleaned it up and it seems to be in better shape than originally thought.
But they are a bit of a mystery to me in how they work, or why they won't. One problem is it takes forever to clear the lines. To the point you will give up on it.
Scenario I want to recover a system to work on it. Set machine to recover, lines are clearing to start recover this might take 20min recover starts and is very slow like an hour. You can watch the recovered amount coming up then then eventually gauges will show vacuum making you think its got all the product out say 1 lb but then it just sits there still recovering, staring at the amount recovered number and it just sits there, no change. Walk away for another hour and it had completed the recover and clear for 2lbs. Ok so it's working? But why so slow and why would it recover some stall and then continue.
Seems to charge fine until it try's to clear the hoses at the end. I don't know if I fully trust the scales but it went though a calibration with the certified weight with no problems. Also for some reason the internal tank sits at an angle on the scales which I found odd but can't see any obvious issue. Vacuum pump seems to work fine. Air purge is working.
I have the operators and parts manual but a service manual is non existent. They do a pretty good job of forcing you back to a dealer or buying a new one. Thought I would ask here before hauling it 2hrs one way for a checkup.
