We've got a 2001 sterling 9500 day cab with a remote mount condenser in the shop, that I'm needing the freon charge amount. I pulled out 4.450lbs. I'm pretty sure that's way too much, there is no info label in the normal places that you would see. I put in 3lbs (which I found on line, but was for a 2018 I think), but it's freezing up. it takes about a 1/2 hr but it eventually makes it back to the compressor. Any help would be greatly appreciated.