Re: AC recharging... at home?

Posted by Bryan in Iowa on July 17, 2006 at 11:13:35 from (205.188.117.14):

In Reply to: AC recharging... at home? posted by hillbillyOH on July 16, 2006 at 18:44:51:

We do a lot of a/c work in my shop. Convert a system to 134 is not that big of a deal .134 is more prone to leaking because of smaller molecules. There is no damage cauused by 134 , it is lack of proper oil charge in system or wrong type of oil when changed over . As far as changing o-rings hoses etc ,,unlseee they are leaking already , they will be fine . Add 8oz of PAG or Ester oil whichever manufacturer reccommends . Vac system down and let sit for a bit after to verify no leaks , charge system with r134 , typically system will require 10% less 134 than r12 .Any overcharge of 134 will greatly affect cooling, even as small as 3-4 oz over . Also , if you use any type of SEALER PLEASE make note of it under the hood somewhere . Sealer will plug a kill most a/c machines in the shop , there are filters avail now to install on machines,,but it is still a pain if you miss one and it goes though a machine . ALso I use an Indentifyer to make sure what is actually in system before even hooking machin eup to it . Lots of blends , butane, mystery freon out there . Don't want to contaminate whole tank of 134 . As far a propane ,,,i saw a picture of a truck that had used a blend ,,,small leak in Evap core,,,blower motor ignited mix and totaled truck .

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