'74 240D A/C works, sort of... - PeachParts Mercedes-Benz Forum

nhdoc · #1 04-13-2008, 04:49 PM

Well, when I bought the '74 240D I saw it was missing its A/C belt. The PO said is was missing when he bought it. I assumed the worst but the compressor turned by hand OK and there was refrigerant still in the system so I figured I'd buy a belt and see if it would work.

Sure enough it sprang to life, and started to cool but I noticed the compressor was bouncing around alot, and then I saw that all of the rubber bushings on the mounting bolts were badly deteriorated, and one of the bolt heads was rubbing against the bypass hose which ran behind the compressor carrier bracket so I pulled the belt off again before it ruined that little hose.

I ordered a set of the bushings and it looks like I will have to pull off the carrier bracket to replace them all. Looks like a bit of a PITA but compared to what can be involved with an A/C repair it is not too bad. Guess I lucked out somewhat with that one.

leathermang · #2 04-13-2008, 05:42 PM

You are dealing with the York compressor mounted high up in the engine compartment ?

nhdoc · #3 04-13-2008, 05:55 PM

Quote:

Originally Posted by leathermang

You are dealing with the York compressor mounted high up in the engine compartment ?

Yes, that's the one.

leathermang · #4 04-13-2008, 05:57 PM

Since it has been out of use a while... you should check the oil level in the actual compressor... we don't have to do this on the Delco's... but you have a sump...
The FSM tells how to make your own... depending on the ' clocking' .... the orientation of the compressor....

nhdoc · #5 04-13-2008, 06:18 PM

Quote:

Originally Posted by leathermang

Since it has been out of use a while... you should check the oil level in the actual compressor... we don't have to do this on the Delco's... but you have a sump...
The FSM tells how to make your own... depending on the ' clocking' .... the orientation of the compressor....

OK, thanks for the tip. I'll look into it. Frankly, I was amazed that is started cooling but am looking forward to getting it back in service. I had the same setup in our original '74 and that A/C was super-cold.

nhdoc · #6 04-23-2008, 03:45 PM

Got all my bushings and washers and bolts today and re-mounted the compressor...fired her up and had to add one can of R12 to top up and she cools great. It was over 80 today here and it was blowing nice and cold on my test drive.

I lucked out having a nearly 100% working A/C system already in the car...just needed a belt and some very overypriced bushings and washers to get it working again.

I didn't check the oil level in the compressor since it was already nearly a full charge in there. You need to drain the refrigerant in order to check it and I saw no reason to do so when the system was already nearly full of charge.