PeachParts Mercedes-Benz Forum - View Single Post

jjalex · #3 05-30-2003, 09:33 PM

I just replaced mine in the '84 300D last weekend.

Save the freon - but of course.

Loosen the adjusting nut and the two bolts that secure the compressor and the really hard to get at bolt that holds it on to the engine. Rotate it on the third bolt to get the belt off.

Then you will remove the two bolts that secure it from rotating. Watch out for the large washers..
Put a pan under the compressor to catch the oil and remove the fitting that holds the hoses to the compressor.

If its original you might find washers that have integrated O rings. Take them off if your new compressor has the O Rings on it.

Remove the last, really hard to get at, bolt and off it comes.

Now the decision: Do you want to pump the new oil into the compressor or do you want to pour it in first?

If you want to pour the oil in while its off the car, then you will need to remove the hoses and attach them to the compressor after you fill it with the proper oil - (mineral if R12 (heaven forbid) or ester oil if R134 and others but I don't know about R4(check with an HVAC guy))... - This will make reinstallation more difficult with those hoses hanging around... Then in goes the freon and off you go...

If you want to pump the oil in just attach the new compressor to the car in reverse of the installation, pump in the oil and then the freon. Burrrrr

Good luck!