A/C amount Freon - 3745

[Don Henschel]

Possibly a bit of heat on the flare nuts might persuade them and if worried about the glass I would warm up the whole assembly with a hair drier or a heat gun on low at a distance to reduce thermal shock. Once warmed up give these nuts a quick flash of heat and try the wrenches again and oh by the way use flare nut wrenches. They are a box end style with a slot to allow the tube to pass through. In severe cases I used vice grips clamped on flare nut wrenches to keep them from spreading but later invested in Snap-On which are superior and a six point wrench. Also place the wrenches slightly apart and squeeze them both together with one hand to prevent bending, and twisting lines or components. If the nuts are even seized to the lines such as the case of rusted brake lines I have heated up the flare nut until it started to glow slightly and broke the rusted brake line nuts loose using a cheap wrench that I didn't care if the heat damaged it and breaking it loose this way saved me from lines twisting off especially if you can't find one right away or want to use the old for an exact pattern. Once they broke loose I would rapidly rock the wrench back and forth while hot to insure they would stay loose after the cool down with penetrating oil used. If I reused the lines I would paint or spray with spray grease or undercoating to stop additional rust on these lines and in the case of the refrigerant lines this wouldn't hurt underneath if rusted. Much kinder to these fittings.are the flare nut wrenches and If you want a sight glass that is miserable to find, try the one on your compressor! Years ago the bananas that shoddily attempted to rebuild mine used a damn sand blaster and were tooooooo lazy and stupid to cover the glass and it was pretty much ruined. Painting it would have been easier to deal with. A leak is certainly no good and has to be solved. I never believed in recharging to limp it along for a month or two especially now with the regulations and price of refrigerant in some locations.