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  • Brake bleeding

    Just replaced front calipers, having tough time bleeding brake system. Using vacuum pump set up (one-person)
    Large bubbles only coming from all four wheel. Gone thru lots of brake fluid.
    Started using farthest RR brake and proceeded to LF, RF and LF. large bubbles only.
    Started the opposite way: LF, RF, LR then RR.; are out come.
    I've bled brakes before and this stumps me... any input out there in 6-PACK/TR land.
    Thanks

  • #2
    Are your connections loose? Drawing air past the bleeder threads?
    1974 TR6 CF19837U

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    • #3
      Leadfoot,
      I've checked the connections more than a few times, no wet spots; the brakes worked fine, till I messed with them. (had leaky pistons on the front.)
      I may be opening the bleed valves a bit much, thinking of wrapping some teflon tape around same.

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      • #4
        There has got to be an air source somewhere. Since you are getting air at all 4 wheels, I have to wonder if there's a leak at the master cylinder or lines.
        New to the British auto world.
        No qualifications - old school shadetree mechanic...just enough knowledge to be dangerous!
        1973 TR6, ZS carbs, Pertronix ignition (for now)
        1973 Ford Bronco, 302 V8
        1952 Ford 8N tractor
        ...they keep me busy!

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        • #5
          Thanks for the info, never though of that...I replaced that in the spring...I'll check it out...
          I just thought of the PDWA switch, it might be lose too...we'll see when I get home from work...thanks

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          • #6
            Try a zip tie around the hose that connects to the bleeder.
            1972 Sapphire TR6 #CC84,something

            1959 Red TR3 (Wife's)

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            • #7
              I'd try bleeding without the vacuum pump before digging too deep into the system.
              Driving a 1973 TR6
              Doing ZS carb repairs
              email kencorsaw"at"aol.com

              Comment


              • #8
                Originally posted by stevew View Post
                Just replaced front calipers, having tough time bleeding brake system. Using vacuum pump set up (one-person)
                Large bubbles only coming from all four wheel. Gone thru lots of brake fluid.
                Started using farthest RR brake and proceeded to LF, RF and LF. large bubbles only.
                Started the opposite way: LF, RF, LR then RR.; are out come.
                I've bled brakes before and this stumps me... any input out there in 6-PACK/TR land.
                Thanks
                Steve --- I haven't found anything better than the 'SPEED BLEEDER" for a one person job of bleeding the brakes. I did use a couple of rounds of Teflon tape around the threads to create a drag when inserting it. Slipped a short length of clear tubing around the bleed nipple, pointed straight up and gave the pedal enough pumps to show no more air present in the tubing.

                Dick

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                • #9
                  Originally posted by poolboy View Post
                  I'd try bleeding without the vacuum pump before digging too deep into the system.
                  +1

                  Always find my way back to the old school way of bleeding. Did get one of those one man bleeder bottle gadgets from TRF though.
                  '74 TR6 CF13007U aka "Mr. T"
                  Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
                  Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
                  Peaks and tweaks, but the spirit of Original
                  Redlines always.
                  My wife is the Driver, I'm just the Mechanic....

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                  • #10
                    A bit of red brake grease on the bleeder screws’ threads keeps them from allowing air past the threads while they are backed off.
                    1974 TR-6 Logic Overdrive

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                    • #11
                      I had same problem. Air was leaking around threads of ancient bleeders. Replaced them and problem solved.
                      SR
                      73 TR6. HT/AC/OD
                      86 930
                      91 535i

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                      • #12
                        Vacuum bleeders, well, suck!
                        I made a pressure bleeder from a pump-up garden spayer, a spare master cylinder cap, a screw-on tire valve extension, and a screw-in tire valve (minus the core). I can bleed the brakes in about 30 minutes, after the car is set in jackstands. And that is with Silly-cone brake fluid. Look online for variations on that theme.

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                        • #13
                          I'm with Dick and the speed bleeders. Here's a e-bay link.. You can purchase just for the brakes or for brakes and clutch...
                          https://www.ebay.com/sch/i.html?_fro...kw=triumph+tr6

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                          • #14
                            I have speedbleeders, too, brakes and clutch, and that will solve the need for another person, but as far as the immediate concern about the air bubbles, see if you can find someone to help so that you can do away with the vacuum pump.
                            Driving a 1973 TR6
                            Doing ZS carb repairs
                            email kencorsaw"at"aol.com

                            Comment


                            • #15
                              I find this little arrangement to be good for one person bleeding. A check valve from Amazon, some tubing, and a jam jar.
                              Click image for larger version

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                              SR
                              73 TR6. HT/AC/OD
                              86 930
                              91 535i

                              Comment

                              Brake bleeding

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