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AC Compressor not working

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Old Apr 30, 2012 | 03:36 PM
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AC Compressor not working

Hey guys I got a 04 V10 6.8L excursion with now all of a sudden the clutch won't engage in the compressor. Is there a shut off switch I don't know about or do I have to replace the whole compressor
Let me get your opinions
Thanks
Tony
 
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Old Apr 30, 2012 | 03:58 PM
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Tony, there's a repair/mod on here somewhere that involves reducing the gap of the clutch. It seems that from wear, the gap gets wider, so there's a small washer in there that you can replace with a thinner one to reduce the gap down to near factory spec. Then it should engage/better. Some have had very good luck with it, but I personally haven't. It got a little better, but it didn't fix it completely.

The mod is the same, as far as I know, for gas and diesel. The 6.8 compressor/clutch is in the lower front corner of the engine. I believe the sticker showing the belt pattern should show which one it is of the group.
 
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Old Apr 30, 2012 | 05:17 PM
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Originally Posted by Sunline Fan
Tony, there's a repair/mod on here somewhere that involves reducing the gap of the clutch.
SpringerPop in the 7.3L forum is the resident guru.

SpringerPop's Compressor Clutch Air Gap

I'll give him a heads up and see if he can add anything.

Stewart
 
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Old Apr 30, 2012 | 05:26 PM
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Thanks guys I did see the gap I'll look into the write up
 
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Old Apr 30, 2012 | 05:56 PM
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Seems like that write up was for diesel do you think the 6.8's would have the same problem because the compressor is @ the bottom and looks diff. From diesel well it appears diff. From looking underneath the car but I am going to try it out tho
 
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Old Apr 30, 2012 | 06:45 PM
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Doubt u have the same problem I had but worth looking at, my belt came apart and took out the wire connector to the compressor. It sits right over the belt. Just something to look at.
 
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Old Apr 30, 2012 | 07:22 PM
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Thanks I'll check but my belts fairly new
 
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Old Apr 30, 2012 | 10:42 PM
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The compressor is the same on all SuperDutys. It's an FS-10. Different number of belt grooves on the pulley, is all. Though the clutch plate might be a slightly different design, with rubber isolators, it adjusts exactly the same.

I found that the clutch is much easier to do on the V-8s and V10s if the degas bottle is removed, and that means draining some coolant first.

But it's all do-able, and shouldn't take much more than a couple of hours.

How many miles are on this rig? The air gap usually doesn't begin to be a problem until about 100,000.

Pop
 
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Old Apr 30, 2012 | 10:56 PM
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I have 170k on mine but I'm guessing tighting up the bolt won't do the work then, it sounds like I'm going to have to tackle it over the weekend
 
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Old May 1, 2012 | 01:53 AM
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I think you should first check the simple things. Air gap wasn't my first thought.

Do you have refrigerant? Maybe a rock put a hole in the condenser and all your R134a came out. Hence, no compressor engagement.

Is there power going TO the compressor? Have you pulled the plug and tested for voltage at the connection?

If not, check fuses? Relays?
 
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Old May 28, 2012 | 12:02 AM
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Found a video on this hope it helps anyone else with this issue
Check out this video on YouTube:

Powerstroke A/C Repair Part 1 - YouTube
 
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Old May 28, 2012 | 12:18 AM
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So what was wrong with yours?
 
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