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N14 ac compressor belt tensioner

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by redrumrevolution1, Sep 8, 2018.

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  1. Sep 8, 2018 #1
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    I have the N14 red top. My ac compressor bracket broke, and i replaced it. Its the square compressor being held by the 4 bolts on square plate and 2 other bolts attaching plate to mounting bracket. How do i tension the belt tight enough so it can engage the AC clutch? there's another bracket in back of the compressor that attach to the mounting bracket but not sure what its use for
     
    redrumrevolution1, Sep 8, 2018
    redrumrevolution1, Sep 8, 2018
    #1
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  3. Sep 8, 2018 #2
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    Sep 8, 2018
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    20180829_161156.jpg
     
    redrumrevolution1, Sep 8, 2018
    redrumrevolution1, Sep 8, 2018
    #2
  4. Sep 8, 2018 #3
    Justrucking2

    Justrucking2 Road Train Member

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    Plymouth MI
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    I would assume there is a belt tensioner pulley that you need to release the tension on with say a 1/2" breaker bar or ratchet. Been twenty years since I have had an N14. Maybe this video of the ISX will help?

     
    Justrucking2, Sep 8, 2018
    Justrucking2, Sep 8, 2018
    #3
  5. Sep 8, 2018 #4
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    Yea its totally different. The belt only wraps around AC compressor and crank pulley
     
    redrumrevolution1, Sep 8, 2018
    redrumrevolution1, Sep 8, 2018
    #4
  7. Sep 8, 2018 #5
    Heavyd

    Heavyd Road Train Member

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    Ok, you realize that bracket is broken and running completely crooked, right? Looks like you need a new base bracket and compressor mounting bracket. Don't mess around, because that bolts to the front cover and you could damage it too which is going to make this even more expensive to repair.
     
    Heavyd, Sep 8, 2018
    Heavyd, Sep 8, 2018
    #5
    BoxCarKidd and 062 Thank this.
  8. Sep 8, 2018 #6
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    Sep 8, 2018
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    I replaced bracket already with new one. just trying to figure out how to tighten the belt
     
    redrumrevolution1, Sep 8, 2018
    redrumrevolution1, Sep 8, 2018
    #6
  9. Sep 8, 2018 #7
    BoxCarKidd

    BoxCarKidd Road Train Member

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    The compressor pivots with the bracket in your picture. You have to leave the lower two bolts a little loose. Then it should have a jack screw or a slotted adjustment bracket. If it is not easy to understand maybe something is missing. A couple more pictures please.
     
    BoxCarKidd, Sep 8, 2018
    BoxCarKidd, Sep 8, 2018
    #7
    spsauerland Thanks this.
  10. Sep 11, 2018 #8
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    Sep 8, 2018
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    The srrqp in tgw pics is what pivoting the compressor. There's a smaller slot bracket piece in back of compressor but its only being held in by a bolt and nut. Theres no way to pivot compressor. What could i be missing?
     

    Attached Files:

    redrumrevolution1, Sep 11, 2018
    redrumrevolution1, Sep 11, 2018
    #8
  11. Sep 11, 2018 #9
    xsetra

    xsetra Road Train Member

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    Aug 21, 2011
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    Mine is different. IMG_20180911_133436464_HDR.jpg IMG_20180911_133356832.jpg

    The adjustment rod is the same as the alternator. Cheaper if you buy it as the alternator rod than the A/C rod.
    Good luck.
     
    xsetra, Sep 11, 2018
    xsetra, Sep 11, 2018
    #9
  12. Sep 16, 2018 #10
    redrumrevolution1

    redrumrevolution1 Bobtail Member

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    Sep 8, 2018
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    Where can i buy this adjustment rod from? Do you know the part number?
     
    redrumrevolution1, Sep 16, 2018
    redrumrevolution1, Sep 16, 2018
    #10
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