Wow! I was contemplating doing a recharge on the W126s after the paint dries. This sounds more complex than trying to figure out how to shoot some paint.
clay > On May 23, 2017, at 11:44 PM, archer75--- via Mercedes > <mercedes@okiebenz.com> wrote: > > > Karl Wittnebel wrote: >> Pressure goes super high, then the compressor fails. It will cool for about >> 30-40 minutes per compressor. Has new evaporator, new expansion valve new >> drier, now on compressor #3 (or about to be). Control unit is new. At least >> one new pressure hose. All the vac pods are new, as is the dash. Works >> great for awhile, then gradually gets warmer over an hour or so, and that's >> it. >> Any ideas on how to troubleshoot this further? Tired of throwing >> compressors at it. Nippodenso units from rock auto, same as original. Of >> course the motor is a 606 now. >> Thanks > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Has the AC auxiliary fan been coming on? > > Did you disconnect all the lines and wash, then blow, them out using AC > solvent from NAPA or elsewhere in the opposite direction from their direction > of flow? > > Did you replace the main freon filter/reservoir? > > Do you have a set of AC gauges (about $60 at HF)?. If so, what were the > readings when the AC was not working properly? (Carefully learn how the > gauges work so you don't accidentally send high pressure into low pressure > cans of freon and/or the low pressure gauges, which could be very injurious > or fatal). > > Which lubricant did you use when you replaced compressors, etc? Did you add > the specified amount? > > Did you add the freon with the can upright or inverted? > > If you added the freon using the typical low pressure gauge that comes with > some cans of freon, what was the pressure reading when you finished? > > Did you have a household or shop fan blowing through the radiator and > condenser when you added the freon? Did you have the AC set on max cool and > max fan speed? > > What has the temperature been where you live? > > There is supposed to an (add-on?) filter that can be installed in the return > line just before the compressor, but I've never heard any discussion about it > on this list, or have seen it listed anywhere. Also, I have no idea where it > would be installed without cutting the return line. This is supposed to keep > the shedded debris from old freon lines from getting in to the AC pump and > other parts. > > Which car is this? All my experience has been with an '83 300D and '83 240D. > > Most FLAPS have a book on auto AC repair which should give you the correct > amounts of freon and oil to add. The different types of oils should not be > mixed > (see the book for a discussion of that.) > > It's 2 am here in Florida. Later this AM someone with more knowledge than I > should be able to help you. > Good luck, > Gerry > > > > --- > This email has been checked for viruses by AVG. > http://www.avg.com > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
