AC
Lead Driver
Joined: Sep 2002
Posts: 9,548
Likes: 2,034
From: North Texas
Oil charge before pulling it down.
Fan clutch easy to check. See how easy/hard it is to spin cold and let it warm up, then shut it off and see how many rotations the fan spins after shut down.
Fan clutch easy to check. See how easy/hard it is to spin cold and let it warm up, then shut it off and see how many rotations the fan spins after shut down.
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Tuned
Joined: Jan 2022
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I checked it cold, it was hard only moved a couple of inches and I did the newspaper trick after starting it and it shredded the end of the newspaper. But I haven't tried it after running it. I do notice at times at idle in park it's barely spinning, but I hear it roaring when at red lights or stop signs when taking off. How many spins at hot ?
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Logistics Pro
Joined: Dec 2003
Posts: 3,779
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From: Foothills of NC
I checked it cold, it was hard only moved a couple of inches and I did the newspaper trick after starting it and it shredded the end of the newspaper. But I haven't tried it after running it. I do notice at times at idle in park it's barely spinning, but I hear it roaring when at red lights or stop signs when taking off. How many spins at hot ?
Fresh unit, back to roaring hot like a garbage truck. 
Lead Driver
Joined: Jun 2021
Posts: 5,221
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I checked it cold, it was hard only moved a couple of inches and I did the newspaper trick after starting it and it shredded the end of the newspaper. But I haven't tried it after running it. I do notice at times at idle in park it's barely spinning, but I hear it roaring when at red lights or stop signs when taking off. How many spins at hot ?
I believe that means the system will have higher pressure, and then the ac comp will have to cycle more because either something like the line can freeze and plug up, the pressure just will break something, or the compressor will burn out.before continuing, I vote you need to figure this out first
Lead Driver
Joined: Feb 2002
Posts: 7,966
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From: Greater Austin, Texas
One question my truck holds 7oz pag oil, after pulling vacuum how much oil to put back in if any ?
Depends. If you have a leak and are doing a repair, I always add 2 oz.
Oil charge before pulling it down.
Lead Driver
Joined: Sep 2002
Posts: 9,548
Likes: 2,034
From: North Texas
I have never rebuilt a system and added oil with those cans, always add oil before then vac it down. There is a reason manuals tell you to add oil prior to assembly and compressors come preoiled. Never slugged one compressor.
