Section : General

Austin Princess 4 pots 

Posted By : John Davies, 05-Mar-2004, 09:14pm

• Austin Princess 4 pots 

  Posted By : Chris Wilson, 05-Mar-2004, 10:32pm

  John,
  
  I remember looking at this website recently (just out of interest!). Don't know if it offers any help/advice?
  
  http://www.bress.freeserve.co.uk/wedge/maint_brake...
  
  Regards
  
  Chris
  
  1975 1500

  • Austin Princess 4 pots 

    Posted By : John Davies, 05-Mar-2004, 11:22pm

    Chris,
    Thank you!
    That TVR website page does offer a different method, but an engineering rather than process one.
    My AP calipers have been adapted to single line input by a transfer line, from the bleed port of one to the input port of the second. This is the method I have always seen used on other people's cars, but that just shows lack of imagination.
    The TVR method is to install a T-piece and run two lines from the main input to caliper. No details given, but the lines downstream from the T are very short, so it appears that they install the T ON the caliper somewhere.
    Hmmm. That transfer line could be where the bubbles reside - unless the AP calipers were just as difficult to bleed on the original two line system car. Could dbe a cure, but will need a bit of coarse engineering.
    
    Meanwhile does anyone have a quick-fix idea, please? Tapping the line with a spanner? Taking the caliper off and bleeding it upside down?
    
    I'm open to any ideas, wild or otherwise!
    John

    • Austin Princess 4 pots 

      Posted By : Jon Wolfe, 06-Mar-2004, 12:13pm

      John, are you sure it's not just that your seals are knacked and giving you a spongy feel? In 2001 I 'spent' about 2 litres of racing brake fluid trying to pump mine through only to find it was the master cylinder that was at fault. I have never had a problem bleeding princess calipers even when fitted with a cross-over pipe.
      
      Jon 'sensible post for a change' Wolfe

      • Austin Princess 4 pots 

        Posted By : John Davies, 07-Mar-2004, 12:10pm

        Jon,
        Thanks for the thought, but the master cylinder is a 'brand-new' reconditioned number from a reputable reconditioner. The rear brake system is solid - it has to be the fronts. And unlike you, I've found mine hard to bleed in thier previous life.
        
        Just a thought - what's the 'correct' position for the cross over pipes? Upper front to inner side? If they are not right, you could be using only one pair of pistons, and 'bleeding' the other!
        John

        • Austin Princess 4 pots 

          Posted By : Nigel Gibbins, 10-Mar-2004, 05:38pm

          John...
          
          Have your really registered your Vitesse into Class D? Mike says you have a 2.5 litre engine in there
          
          He also says it's not a problem even though four pots aren't allowed We just wanna see you racing agian
          
          

          • Austin Princess 4 pots 

            Posted By : John Davies, 11-Mar-2004, 00:12am

            Nig,
            True, and true. I never was a good liar.
            
            And Oops, I should read the Regs better. Class G?
            
            I just read the 2003 Regs - "No front vented discs" either. B*gg*r. Can I play if I promise to tape over the vents?
            But no mention of four pots, except for A class. Are the 2004s different?
            John