Fan clutch hiss

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by JustAnotherOTRguy, Jun 13, 2024.

  1. JustAnotherOTRguy

    JustAnotherOTRguy Bobtail Member

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    Jan 9, 2021
    0
    So... im losing my marbles trying to figure out whats going on.. id been losing a good amount of air, more often to where ny compressor kicks on every few minutes. I replaced my fan hub assembly in december, but the reman started behaving like it was busted again already (fan getting louder, hissing while off and hissing for about 4 seconds after shut down) i replaced it 2 days ago and im still getting the same issues. Chased the airlines and cant find any leaks. Now its a brand new hub assembly and its still happening. I had thought maybe the solenoid was stuck open, but then the fan would just run condtanly on high. Id really appreciate any input
     
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  3. 062

    062 Road Train Member

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    Oct 20, 2013
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    Is your compressor passing oil?
    Could be just a bad reman.
     
  4. JustAnotherOTRguy

    JustAnotherOTRguy Bobtail Member

    2
    1
    Jan 9, 2021
    0
    Nope, no oil. That was my initial thought too
     
  5. BoxCarKidd

    BoxCarKidd Road Train Member

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    Um very strange! I would want to put a pressure gauge teed into the line for the hub. Is air volume limited causing the clutch to operate in limbo?
     
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