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1966 s type jag brake problem

  • 24-02-2013 7:07pm
    #1
    b.c
    Registered Users, Registered Users 2 Posts: 186 ✭✭


    Hi all
    Having a problem with an s type, brakes lock up while driving after a few minutes, seems to be air building up in the braking system, have tried disconecting vacum to servo but this has no effect.
    to get going again bleed nipples on calipers have to be released.
    any ideas?


Comments

  • #2
    hi5
    Registered Users, Registered Users 2 Posts: 3,107 ✭✭✭hi5


    Sounds like your rubber hoses, they can collapse on the inside and act like a one way valve locking the brakes, even with air in the system the brakes should still release.


  • #3
    b.c
    Registered Users, Registered Users 2 Posts: 186 ✭✭b.c


    cheers, ill check them out, most of the braking system has been overhauled or replaced over the last few years,hoses might have been overlooked


  • #4
    w124man
    Registered Users, Registered Users 2 Posts: 2,348 ✭✭✭w124man


    b.c wrote: »
    cheers, ill check them out, most of the braking system has been overhauled or replaced over the last few years,hoses might have been overlooked

    I would have thought that the hoses would be the first thing that would have been changed .... being perishable and all!


  • #5
    b.c
    Registered Users, Registered Users 2 Posts: 186 ✭✭b.c


    w124man wrote: »
    I would have thought that the hoses would be the first thing that would have been changed .... being perishable and all!

    Possibly were the first thing that was changed!


  • #6
    JP 1800
    Registered Users, Registered Users 2 Posts: 389 ✭✭JP 1800


    Even though the vacuum hose is disconnected the servo could still be the problem especially if it is an original girling MK2 servo. The seals can swell or become lodged in the vacuum chamber and the return valve causing the brakes to lock on, if this happens try tapping the end plate of the vacuum chamber( the large cylinder in front of the servo with a soft instrument to see if it releases the brakes. Under no circumstances should the cylinder be hit on the side as this may dent the cylinder causing the brakes to stick on.


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