Last week my A/C compressor starting making all kinds of racket and the belt started to slip and burn. I checked the refridgerant and it was still full. I would like to replace the clutch on the compressor if that is the problem or if that is feasible for this compressor otherwise I'll have to replace the compressor(new one), expansion valve, and the R/D just so that the compressor stays within warranty. This is for an 82 300D turbo that PO had converted to R134a but I'm not sure as to when this was done or if the compressor was changed then or just flushed. I'm thinking if I had to replace the compressor I may just reconvert to R12 but time and money may be an issue with that.

I've used the search function but couldn't find anything on replacing A/C comp clutch.

I could be wrong but, my experience with ac systems went from 0 to more than the guys at my local MB dealer in about 3 months.
The compressor in your car is a General Motors product located on the cars bottom left engine sections. If you talk to any parts store they will tell you that it is cheaper to buy a rebuilt than fix it yourself. This may be true. I have never seen rebuild kits for cars as new as the 80's. Hopefully the other guys have a better answer for you.

Good Luck!!!!

Make sure it's not a seized compressor. If it is, replacement with new(as you proposed), along with the components you listed, is smart. FULL flush as well. Larry Bible has a lot of good info in the archives on this. An R4 (what your compressor is) is not worth rebuilding IMHO (BTDT). The only part I'd replace on an R4 is the shaft seal (with a new double lip). Anything more needed on one, get a NEW one. A good place to start your A/C education is here: http://www.aircondition.com/wwwboard/

__________________
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

" to more than the guys at my local" (whatever).
I hate that. When I finally give up on self researching or doing and go to some person in the business I hate to find out I know more than they do. It means the ball is still in my court when I am willing to hit it to someone else. But it is really hard to find people who can catch the ball that are honest and reasonable enough to afford.

I had the clutch on my 78 300D go out. When running the AC you could see the pump would not turn, and the pulley was turning and making a huge racket. I was able to confrim the pump was probably still working by removing the pulley and clutch set and using a wrench or vise grips to turn the pump. That will not confirm the pump is still intact, but it turned over freely so I assumed I had not blown the compressor.
Next was to locate another clutch assembly. Being I was interested in getting is fixed quickly and for as near to free as possible, I went to a local wrecker, with the clutch assembly in hand. Was able to match it up to another that was on an old Caddy. Cost me five. Easy fix. I think I had to use the old pulley. Also the bolts on the compressor on both the MB and Cad were not metric. Detroit iron all the way. Ran just fine with the used clutch.

I just went out ot the car during a break at work and checked it real quik. It seems that the compressor has just froze up. I called the local Advance auto and got a NEW compressor, expansion valve, and R/D and will have the system (as Larry Bible would say)flushed, flushed, flushed, and then flushed again . I would like to go back to R12 but my other two vehicles(98 Chevy Suburban, 96 Olds Cutlass Cierra) are both 134 and I have all the tools for that and alot of 134 here right now. I have been on Ebay and saw that there is alot of R12 out there and I do have my 609 certification but I am not a professional technician (only amatuer) for AC systems. I am learning here and as I go but doing so VERY VERY carefully. I'll keep you all posted after I get the items installed and the system flushed and evacuated as to wether on not I go back to R12.

OLD DIES - FWIW - I wish I could but there are not many junk yards around or near here or else I would be in there every weekend. Thanks for the know how though maybe I can use that knowledge in the future for this or my next car.