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1956 mercury rear brake question

Discussion in 'The Hokey Ass Message Board' started by merking56, Mar 31, 2013.

  1. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    On the driverside rear axle tube there is a brass block that the rear hard lines and one rubber line go in. The bolt that holds this block down also has a knob or primer type top to it. The bolt is hollow almost like it is using air or vacuum from the axle tube. My question is can I move this block and lines and fill the hole with weld?
     
  2. I'm sure you could but that's its breathing point
     
  3. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    The axles breathing point?
     
  4. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    I can move it and put the breather bolt back in the hole.
     

  5. 48 Chubby
    Joined: Apr 29, 2008
    Posts: 1,014

    48 Chubby
    Member Emeritus

    Yes you can. But it will either vent through this bolt or blow the seals out.
     
  6. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    Well I don't want that to happen, so Il move the block and secure it with a new bolt. I will put the breather bolt right back in the hole with some kind of spacer so it sits where it use to.

    Thanks guys
     
  7. tommy
    Joined: Mar 3, 2001
    Posts: 14,757

    tommy
    Member Emeritus

    The factory did nothing just for kicks. A vent is needed. It can be moved but why not just leave it alone?
     
  8. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    I understand everything is done for a reason. The block and one hardline are right in the way of where my lower bag mount needs to sit on the axle tube. I need an alternative mount position for this block without screwing any function up.
     
  9. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,490

    Rusty O'Toole
    Member

    That would be perfect. While you have it off you could hit it with a wire brush and blow through with compressed air, sometimes they get plugged up after many years.

    If you have to relocate it the position is not critical as long as it is on top of the axle tube.
     
  10. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

  11. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    I'm going to relocate the block somewhere on the frame rail nearby.
     
  12. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

  13. gimpyshotrods
    Joined: May 20, 2009
    Posts: 18,004

    gimpyshotrods
    ALLIANCE MEMBER

    You mean the block that it the T, which joins the rubber hose from the frame rail, to the two hard lines, one for each drum assembly? That one needs to be on the axle, somewhere.
     
  14. Can't put it on the frame rail, "needs to be on top of the axle".
     
  15. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    I may have misunderstood the reason for this block. I thought it was just a junction block for the brake lines and they used the bolt that holds it in place as a breather for the axle.
     
  16. gimpyshotrods
    Joined: May 20, 2009
    Posts: 18,004

    gimpyshotrods
    ALLIANCE MEMBER

    That is indeed exactly what it is. You had said earlier that you planned to relocate it to the frame. It must remain, somewhere, on the axle. The vent needs to present, somewhere on the housing. Anywhere not in direct oil spray is fine. The junction block/rubber hose end needs to be on the axle too. Anywhere the hose reaches, throughout the full suspension travel. The vent and the distribution block need not be together, that is just clever, not necessary.
     
  17. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    Right can't be frame mounted because of suspension travel. I'm going to have to plug the existing hole and tap a new one. Unless I modify the lower bag mount
     
  18. merking56
    Joined: Dec 13, 2010
    Posts: 314

    merking56
    Member
    from NJ

    I suppose I can move the junction block a few inches towards the rear so the bag mount sits right and the breather can stay as the bag mount provides enough room for it underneath.
     
  19. gimpyshotrods
    Joined: May 20, 2009
    Posts: 18,004

    gimpyshotrods
    ALLIANCE MEMBER

    You can weld a bolt to the axle tube, by the head (after removing the plating) to retain the junction block. Tighten a nut and a lockwasher down on it, and you're good-to-go.
     

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