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  1. 98G

    Pop off valve sticking, need correct term for the TMs

    Expello valve.
  2. 98G

    Pop off valve sticking, need correct term for the TMs

    Pressure protection valve opens the secondary side at 70 psi and supplies air to the wipers and horn and governor. At 120psi the expello valve sneezes. If the PPV fails, the sneeze never happens and you get pressure to 150psi at which point the pressure relief valve opens. What i think...
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