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Hobert62

Pedigreed Bulldog
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Posts posted by Hobert62

  1. On that style tractor protection valve the line on the right is the supply.   It has air if the truck has air.   The line in the center of the valve is the line that controls the service breaks.  It only has air when breaks are applied.                    

     

    The first valve and switch is where the foot valve and trailer hand valve are combined which supplies trailer brakes through the center line going into the tractor protection valve.   That one is the brake light switch it only has air when either the pedal or hand valve are applied.  

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  2. No answers, but some ideas anyway.     Are you sucking an intake hose or boot shut starving it for air?    If your fuel lines are a few years old they where from your other motor.   Is the suction line big enough for the turbo motor during a pull?     When it acts up what does it do if you take your foot off the throttle for a few seconds then get back in it?   

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