I have been reading the many comments and discussions on DIY A/C repair. There is some great stuff on this site. One thing that seems unclear to me. Should I attempt to flush my A/C system, myself? Or do I take it in to the shop for that? Also, can I replace my compressor BEFORE I flush the system? Or does that have to happen, first?

This is a 1987 300TD with an original R-12 system. I have purchased the compressor and reciever/dryer. A pair of o-rings came with the dryer, but I suspect there may be others. I still need to research this, and the location of the orifice tube. I understand it's a good idea to replace that as well.

My compressor has siezed and the shaft won't even turn. The bearing on the clutch was already pretty wobbly before it failed, and now the clutch has failed. Went I start the engine, the pully doesn't turn (yes, the A/C is off) and the belt squeals.

I am wondering if I must have it towed to a shop to be flushed (and vented) BEFORE I can do the repairs. This is begining to sound like three towings. Once to and from the shop, and a third after I make the repairs. If this has been discussed, elsewhere, my apologies. I am still rereading some of the posts. There is a mobile A/C guy in my area, but he doesn't do "flushes" just empties and recharges.

many thanks.