If comoressor governor is broken Relief Valve Kicks in ?

Discussion in 'Questions From New Drivers' started by R-Team, Oct 17, 2011.

  1. R-Team

    R-Team Bobtail Member

    14
    1
    Sep 19, 2011
    0
    [FONT=Arial,BoldItalic][FONT=Arial,BoldItalic]
    I think I found a dangerous error in the on-line training course at the school
    I am going to attend.


    On this question.
    If your air brake system safety relief valve opens a couple of times, you should have your system repaired. False​
    The online course says false...I think the answer is true.

    Every DOT CDL manual states that the compressor governor should
    stop pumping air *cut out" at 125 psi. If the governor is not working
    pressure will shoot to 150 and cause the safety release valve to
    kick in ? ALL DOT manuals state that If the safety valve releases air,
    something is wrong. Have the fault fixed by a mechanic.
    See below...

    [FONT=Arial,BoldItalic][FONT=Arial,BoldItalic]5.1.2 - Air Compressor Governor[/FONT][/FONT]
    The governor controls when the air compressor will​
    pump air into the air storage tanks. When air tank
    pressure rises to the "cut-out" level (around 125
    pounds per-square-inch or "psi"), the governor
    stops the compressor from pumping air. When the​
    tank pressure falls to the "cut-in" pressure (around​
    100 psi), the governor allows the compressor to​
    start pumping again.
    5.1.6 - Safety Valve
    [/FONT]
    [/FONT]
    A safety relief valve is installed in the first tank the​
    air compressor pumps air to. The safety valve​
    protects the tank and the rest of the system from​
    too much pressure. The valve is usually set to​
    open at 150 psi. If the safety valve releases air,
    something is wrong. Have the fault fixed by a
    mechanic.

    - So if the compressor governor is broken or out of adjustment
    the relief valve kicks in ? Is a broken or out of adjustment governor
    a reason to have the fault fixed by a mechanic ?

    [FONT=Arial,BoldItalic][FONT=Arial,BoldItalic]Could you PRO's let me know ?[/FONT][/FONT]

     
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