740 brake servo function delay at low temps

Discussion in 'Volvo 740' started by viktor weisshaeupl, Mar 6, 2004.

  1. viktor weisshaeupl

    viktor weisshaeupl Guest

    When temperature is below freezing point, the servo power of
    the brakes won´t be active before driving a few minutes.
    Volvo 740 Turbodiesel 1989. Happens never during summer.
    Haven´t searched yet for a hose containing condensed water.

    Thank You for any input.
     
    viktor weisshaeupl, Mar 6, 2004
    #1
  2. viktor weisshaeupl

    Peter Milnes Guest

    This can be caused by the one-way valves in the vacuum pump or iced condensation
    inside the pump and also check the lines from pump to brake servo.

    Cheers, Peter.

    : When temperature is below freezing point, the servo power of
    : the brakes won´t be active before driving a few minutes.
    : Volvo 740 Turbodiesel 1989. Happens never during summer.
    : Haven´t searched yet for a hose containing condensed water.
    :
    : Thank You for any input.
    :
    : --
    : Viktor Weisshäupl
    : personal e-mail to: weisshaeupl at utanet dot at
    : The e-mail adress in the newsreader exists, but is never
    : read and only meant to hold the flood of spam
    :
     
    Peter Milnes, Mar 7, 2004
    #2
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