Right! I have just had another look. I am guessing it is the bolts behind the pulley wheels themselves. Like vstech says it is actually the pump itself that needs to be slackened off? It seems very strange way of doing things thats all!?

I cut my AC belt off and good riddance. My r12 unit was nonfunctional any way

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1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily

I eventually got my head around the fitting of the belts and the job is now done.
Thanks to Geof a.k.a pizzachef I would have really struggled without the pdf he emailed me with the tightening and loosening sequence.

I do have a major concern as to how close the fan/ water pump belt is getting to the adjusting nut. There is very, very little clearnence here and I am worried that the belt will catch and snap again???

Any advice here???

You are in VERMONT. Your R12 should have been taken out of your car and shipped to TEXAS long ago.

I ended up grinding the end off the adjusting nut (it had already had a nut welded to the threaded bar that was too big so I welded a nut on the right size so that it would not stick out. Sorted.

I have a similar problem. I have a 79 240D and I need to replace the condenser belt. A friend of mine did the other 2 belts for me. At the time the A/C wasn't working and the part company sent him the wrong belt, so he said he would do it for me when we fixed the a/c. Now I want to do it myself because I fixed the a/c. the system is updated to R134a, does that make a difference? I would be interested in getting that pdf of the pivot points.

Maybe this will help you. hope it still works.

http://mercedes.thatchermathias.com/

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

its all in there, i now just need a crow bar to adjust the tension on the compressor belt. Apparently, mercedes thought it was only a good idea to put a tensioner bolt on some of the pulleys...

Did you look at the Maintenance Manual it linked to?

Here is the section on adjusting the belts.

http://mercedes.thatchermathias.com/Index/616/13AccessoryBelt.htm

You DON`T need a pry bar.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works