AC Compressor (Can I drive it) - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 05-24-2012, 12:55 PM Thread Starter
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AC Compressor (Can I drive it)

As soon ac i get it home from paint the compressor locks up. Cant I just remove the belt and drive it until I have time to repair it? Or is there more involved?

1976 300D
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post #2 of 6 (permalink) Old 05-24-2012, 01:26 PM
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Originally Posted by seventysix300d View Post
As soon ac i get it home from paint the compressor locks up. Cant I just remove the belt and drive it until I have time to repair it? Or is there more involved?

1976 300D
Before removing the belt, just disconnect the single wire to the a/c clutch. If it is the internals of the compressor locking up, then you will be able to drive it.

Are you sure that it's not the idler that's making racket? Did the belt squeal?
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post #3 of 6 (permalink) Old 05-24-2012, 01:50 PM Thread Starter
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Not sure. I opened the hood and the belt was trying to turn the compressor and was being forced to slip, I sprayed some wd40 on the belt thinking it might help all it did was make it easier for the belt to move around the pulley for a few seconds. Do you know where I could find a rebuild kit? I cant seem to find one anywhere.
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post #4 of 6 (permalink) Old 05-24-2012, 03:53 PM
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Did you try adjusting the tensioner to see if enough force was being supplied to turn the pulley? If you try this and it still won't grasp then so long as that is the only component on the belt you can remove it. I am not familiar with your model's layout so you will have to verify that first.

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post #5 of 6 (permalink) Old 05-25-2012, 06:08 AM
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Unless it has been converted, this should be a York type compressor. They are cheap and plentiful on the rebuild market.

You need to start, however, by removing the belt and turning the pulleys by hand to see if they are free. Then turn the front portion by hand. If the pulleys turn easily and smoothly, but the front portion does not, then it is internal in the compressor. You will need to replace the compressor and probably flush the system thoroughly and replace the filter/drier. In the meantime, however, if the pulleys turn freely, simply disconnect the single wire to the compressor clutch. If it is not engaged, the belt should turn smoothly.

Hope this helps.
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post #6 of 6 (permalink) Old 05-25-2012, 07:22 AM Thread Starter
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Great advise! Thank you both. I will give it a shot this weekend and report back.
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