Hi all! Firstly, I just finished reading all 664 pages and my head hurts! Mark, if you're still out there thank you for planting the seed that started this thread! Griff and Leeann, thanks for sticking around too! I recently purchased a new to me 1977 Chevron class C 21' (bumper to bumper) built on a 1976 MB400 sportsman cutaway. She's 440 powered and in the next couple of days I will fill in the details with pics and the adventure getting her home. But I'd like to give a bit of input the AC issue with goreds van. Your symptoms are similar to the ones on my '98 safari, replaced compressor, drier and office tube 6 years ago and it was doing the same as yours. I converted to R-134 at that time and bought a set of gauges and a vacuum pump from harbor freight. To fix my issue this time, I vacuumed the system down, replaced the office tube (it's a inline filter) and vacuumed the system again and recharged it. The orfice tube didn't have much in it but if there were metal debris caught in it I'd know that the compressor was on it's way out. Good as new though - and since I have the equipment already it cost about $18. For you to buy the same would probably be about $200 but once you own the equipment you won't really be stuck without AC again... (Please note, I'm only working with automotive R-134 and am not an HVAC tech, but an hobbiest mechanic :))
