Cracked head (intake) but 2 different stories from 2 different mechanics !

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by rbrauns, Nov 29, 2019.

  1. JAD1024

    JAD1024 Light Load Member

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  3. AModelCat

    AModelCat Road Train Member

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    I'd bet that the little line you took off was the signal line for the governor. If its not connected, the governor can't tell what the pressure in the tank is and will never unload the compressor.
     
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  4. JAD1024

    JAD1024 Light Load Member

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    Bled air off, it didn’t have any effect - hopefully I can isolate the air compressor tomorrow... was hopefully when gases test stayed blue but hearing they may not be dependable
     
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  5. Rideandrepair

    Rideandrepair Road Train Member

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    If you take the big braided SS line off top of compressor, it won’t build up any air at all. Then check for bubbles.
     
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