2nd Gen Non-Engine/Transmission can you flush the AC condensor on these trucks

[VHolloway]

I had AC WORK DONE AND THE SHOP TOLD ME THAT YOU CAN'T FLUSH THE CONDENSOR ON THE DIIESEL TRUCKS IS THIS RITE

 

[WDixon27]

i don't see why you can't if you remove the orifice tube first, it's in the condensor output tube at least on my 96, i just did a compressor on my truck last night but the system was pretty clean (compressor didn't barf the clutch died so there wasn't a bunch of crap in the system), i just blew the old oil clear with shop air, i got my flush gun from napa a couple years ago and can't remember what it cost but the good non residual flush is pricy at around $100 a gallon (i don't like the oily crap from o-reily), i use it about a pint at a time till it comes out clean, usually takes no more then 2 flushes to clean a part