Brand New A/C Compressor Clutch Slipping

Discussion in 'Tech Discussion' started by DBarre, Dec 7, 2018.

  1. DBarre

    DBarre Member

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    I've got a brand new R4 compressor installed with a new condenser, drier, orifice tube, and o-rings. I vacuumed it down and started charging it with R134a. Once I got a partial charge in the system, the clutch started slipping and making this godawful screeching. I really don't want to have to send the stupid compressor back for warranty replacement.

    Is there something I'm missing? Maybe there's a way to adjust the clutch so it actually engages properly. I just don't know what it is.

    Any help would be appreciated.
     
  2. bucket

    bucket Super Moderator Staff Member

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    Yeah, it happens with today's garbage parts.

    Can you turn the clutch plate by hand?
     
  3. DBarre

    DBarre Member

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    I was hoping for better luck.

    I can turn it with a pair of pliers and it turns fairly easily.
     
  4. yevgenievich

    yevgenievich Full Access Member

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    Check the distance between the clutch plate and the coil. It can be pressed closer if that is the issue. Also verify pressure not spiking on high side when problem occurs.
     
  5. Snoots

    Snoots Supporting Member Supporting Member

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    I hate to be the one to ask this but I must.

    Are you absolutely certain that it's the compressor clutch and not the belt?

    Plus, what yevgenievich suggested.
     
  6. DBarre

    DBarre Member

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    I've read about doing this, but how do I check it? I did notice what looked like small metal shavings around the pulley. I'm guessing that's not good!

    I'm pretty sure it's not the belt. Brand new belts and it looked like it was turning.
     
  7. yevgenievich

    yevgenievich Full Access Member

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    What is the current distance? Should be around 0.5mm-1mm
    Would be good to put gauges on it when issue comes up as well
     
  8. DBarre

    DBarre Member

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    Do I just stick a feeler gauge in between the pulley and clutch?

    I had the gauges on when I was charging it, but I don't remember the exact numbers. The high pressure was still coming up and the low was coming down. It's probably got about half the refrigerant it needs and then the squealing starts. At that time, the compressor is no longer running and the high and low pressures begin to equalize. I haven't been able to charge it any more because the clutch won't fully engage. I pretty much gave up after we started getting all the cold weather.
     
  9. Snoots

    Snoots Supporting Member Supporting Member

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    Just a wild guess but, got enough PAG oil in it?
     
  10. yevgenievich

    yevgenievich Full Access Member

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    Not exact r4 spec but example.
    Screenshot_20181208-070608.png Screenshot_20181208-070511.png Screenshot_20181208-070450.png
     

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