Announcement

Collapse
No announcement yet.

master cylinder - tiny metal piece - what is it, how is it held in place?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    master cylinder - tiny metal piece - what is it, how is it held in place?

    hi folks,

    rebuilding my front brake master cylinder.

    as I was cleaning, this little doodad fell out.
    20221112_232657.jpg

    i can see 2 holes at the bottom of my master cylinder - a tiny air hole and a bigger fluid hole.

    20221112_232708.jpg

    1 - i assume i just press this little metal doodad into place
    2 - is that enough to hold it in place???
    3 - what is the purpose of that thing?

    thanks!


    #2
    Yes, just press it in place. It covers the tiny bleed hole. Without it, a stream of brake fluid will come out during bleeding and get all over everything you don't want it on.

    You do it once and you'll never forget it again.
    Last edited by Captain 80s; 11-13-2022, 10:56 AM.
    "I couldn't afford NOT to buy it!"

    Comment


      #3
      Originally Posted by Captain 80s View Post
      Yes, just press it in place. It covers the tiny bleed hole. Without it, a stream of brake fluid will come out during bleeding and get all over everythimg you don't want it on.

      You do it once and you'll never forget it again.
      That's one of those parts that I know is there, I just accept that it's there and never give any thought to what in the hell it's for.

      Don't spend money and buy, spend time and learn.

      Comment


        #4
        Originally Posted by Captain 80s View Post
        Yes, just press it in place. It covers the tiny bleed hole. Without it, a stream of brake fluid will come out during bleeding and get all over everything you don't want it on.

        You do it once and you'll never forget it again.
        Ahah.
        After rebuilding this time, I don't imagine I will need to do this again anytime soon.

        Comment


          #5
          it's an eye protector cuz you'll get a shot-squirt to the face without it.
          "It's only getting worse."


          MY rides: '97 VFR750, '90 Red Hawk, '88 Blue/Black Hawk, '86 RWB VFR700 (3), '86 Yamaha Radian, '90 VTR250, '89 VTR250 (2), '73 CB125, '66 Yamaha YL-1

          Sold: '86 FJ1200, '92 ZX-7, '90 Radian, '73 CB750, '89 all-white Hawk, '88 blue Hawk, '86 FZ600, '86 Yam Fazer 700 , '89 VTR250, '87 VFR700F2, '86 VFR700F.

          Comment


            #6
            Is DOT 4 good for skin health and complexion? Asking for a friend...

            Comment


              #7
              tian647, yeah i don't think so! =

              Ugly Before Shots (tho I had already done a little cleaning)

              20221112_110149.jpg

              20221112_114442.jpg

              By the way, it was tough to get out the spring/piston assembly from the master cylinder. i tried using need nose pliers to wiggle and pull it out with no luck.
              Then I tried using a screwdriver to lever it out and you can that I busted the top, which fell off shortly after this picture was taken.

              20221112_114137.jpg

              Fellow hawkster, Will T, suggested using some sort of punch to drift it out. I used a dremel to remove the tip from my screwdriver, and then filed and polished it smooth.
              To try to be careful of the inside bore of the MC I cut some rubber tubing that went over the shaft.
              With some heat and lots of penetrating liquid it finally came out. Very satisfying.

              20221112_164825.jpg

              Happy to report that the MC is reinstalled, topped up with fluid, and even was able to build up pressure in the brake line and squeezing the lever applies force to the calipers.

              While I was in the neighborhood I gave my throttle cables and right side switchgear some love. Nice and smooth now.

              Next up is the front caliper rebuild.

              Comment

              Working...
              X