Announcement

Collapse
No announcement yet.

Brake Caliper Seal question

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    Brake Caliper Seal question

    I know this has been covered here before but I couldn't find the information. I'm going to rebuild my front calipers on the GS1100 and have a question regarding the seal orientation. The piston seal is not flat on the inner edge, it is angled. I can't remember what the orientation should be. I think it should be oriented with the shorter end toward the brake rotor so it helps hold the piston near the rotor so there's no wasted lever travel moving the pads against the rotor.

    Is this correct? Please inform......

    Thanks,
    Joe
    IBA# 24077
    '15 BMW R1200GS Adventure
    '07 Triumph Tiger 1050 ABS
    '08 Yamaha WR250R
    "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

    Tags: None
    #2
    When you remove one, look to see how its oriented Replace the same way.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

    Comment

      #3
      Originally posted by chuck hahn View Post
      When you remove one, look to see how its oriented Replace the same way.
      Chuck,

      That's the issue. I replaced them a few years ago and I think I installed them backwards........

      I believe the way it works is that the rotors push the pads and pistons away from the rotors when the brake pressure is released. If the piston seals are oriented incorrectly they will pull the piston further away from the rotor and additional lever travel is required to push the pads back against the rotors. If they are correctly oriented they will push the pads lightly against the rotors so the lever is firmer and needs less travel.

      Thoughts?
      IBA# 24077
      '15 BMW R1200GS Adventure
      '07 Triumph Tiger 1050 ABS
      '08 Yamaha WR250R
      "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

      Comment

        #4
        Angled? You sure? No mention of that in the service manual.
        Ed

        To measure is to know.

        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

        Comment

          #5
          Originally posted by Nessism View Post
          Angled? You sure? No mention of that in the service manual.
          Ed,

          Yes, I'm sure. I also checked the manual when I rebuilt them and found no mention of it either. I've been doing some searching and have found a couple other mentions of an angled seal. Here's one from an EX500 forum. It doesn't have a definite answer but it seems the angle is there to help pull the piston and pads AWAY from the rotor. I have also found a lot of info mentioning that the caliper seal groove is angled at the bottom. See this article and diagram.



          From this diagram it appears the angles edge of the seal should be down and the flat edge up. It's hard to tell from the diagram but it looks like the short edge of the seal should go away from the rotor? I guess it would be easy enough to determine by measuring the depth of the groove.

          Thanks,
          Joe
          Last edited by Joe Nardy; 08-17-2013, 12:48 PM.
          IBA# 24077
          '15 BMW R1200GS Adventure
          '07 Triumph Tiger 1050 ABS
          '08 Yamaha WR250R
          "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

          Comment

            #6
            Here's another thread about his form a TL Forum. It shows the below pic very clearly showing the angle. I would assume the angle would match the angle of the groove in the caliper??



            Thanks,
            Joe
            Last edited by Joe Nardy; 08-17-2013, 01:47 PM.
            IBA# 24077
            '15 BMW R1200GS Adventure
            '07 Triumph Tiger 1050 ABS
            '08 Yamaha WR250R
            "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

            Comment

              #7
              Here's another thread about his from a TL Forum. It shows the below pic very clearly showing the angle.



              Thanks,
              Joe
              IBA# 24077
              '15 BMW R1200GS Adventure
              '07 Triumph Tiger 1050 ABS
              '08 Yamaha WR250R
              "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

              Comment

                #8
                Found this from a GSXR1000 manual, looks like the widest part faces the dust seal

                Removal Notice | Scribd
                http://www.scribd.com/doc/284808/Suzuki-GSXR-1000-k5-K6-Service-Manual


                Comment

                Previous template Next
                Working...
                X