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Caliper seal direction???

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  • Caliper seal direction???

    I'm rebuilding my stock TLR 6-pot Tokiko front calipers. The TLR manual says the new seasl should be assymerical and must be put in facing the correct direction, with the wider side of the wedge shape pointing outside and toward the open end of the cylinder. I can't easily tell which way is which as the seals look about the same width on top and bottom, though they are not supposed to. One side face was shinier than the others on both the old and new-old ones though, is that any clue? And the newest ones with the new number that supercedes the original are shineir all over so there is no "shiny side"...

    In the back I am running a radial 4-pot Tokiko from the front of an '06 GSXR 1000. Are those seals also assymetrical? I can't tell up from down with them either. I was hoping to avoid downloading the GSXR manual if anybody knows the answer.



    For the old 6-pots: The new seal kit seems to be made of a new shinier material. I also have a new old-style seal set. I have a spare unused old-style piston set.

    But I see the much newer radial has pistons coated with some fancy hard coating. Looks like good stuff. Perhaps I should have ordered all new pistons for the 6-pots as I see my old numbers have now been superceded. I wonder whether the new psitons now have a similar coating or differetn material? Too bad when Suzuki supercedes parts they don't make it clear exactly what the change was.
    It's about control skill; this is a motorized dance for joy and not Russian roulette.

  • #2
    Re: Caliper seal direction

    The last time I put seals in my 6-pots, a very slight cross-sectional taper could be seen, but I needed a magnifying lens to verify which way was which. Goes with getting old....
    January 2012 - BBOTM & TLOTM

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    • #3
      Re: Caliper seal direction

      I agree, I don't think I can see it in the O.D. or edge taper, but I recall being able to recognize a thicker side and thinner side. Now my eyes are older and I can't be sure. Maybe I should get a really big magnifying lens and check them before I torque the main bolts.
      It's about control skill; this is a motorized dance for joy and not Russian roulette.

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      • #4
        Re: Caliper seal direction

        I needed to look at each seal for about a minute before installing them. Turn them over and around, eventually they start to look tapered.

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        • #5
          Re: Caliper seal direction

          I always struggle with these too, no easy answer either really.

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          • #6
            Re: Caliper seal direction

            If my eyes are this bad maybe I shouldn't drive anymore. I need a huge magnifying lens with a light around it, like grandma used for threading a needle.
            It's about control skill; this is a motorized dance for joy and not Russian roulette.

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            • #7
              Re: Caliper seal direction

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              • #8
                Re: Caliper seal direction

                Originally posted by cyclecamper View Post
                If my eyes are this bad maybe I shouldn't drive anymore. I need a huge magnifying lens with a light around it, like grandma used for threading a needle.
                Welcome to the club.
                January 2012 - BBOTM & TLOTM

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                • #9
                  Re: Caliper seal direction

                  They put a color-code on them to mark the size, why the heck not mark the top too? If we struggle with it, I'll bet half of them go in upside down.
                  It's about control skill; this is a motorized dance for joy and not Russian roulette.

                  Comment


                  • #10
                    Re: Caliper seal direction

                    I'm not just talk...that's what I did. Went to Harbor Freight and bought one of those big magnifying lenses with a flourescent light around it. Still the only way I could detect the taper was to put the seal between parallel jaws.



                    It's about control skill; this is a motorized dance for joy and not Russian roulette.

                    Comment


                    • #11
                      Re: Caliper seal direction

                      So, you solved the mystery, eh? At least you shouldn't have any problem seeing the photos you posted. They're HUGE!
                      January 2012 - BBOTM & TLOTM

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                      • #12
                        Re: Caliper seal direction

                        Camera in close-up mode and took the pic thru the big magnifying lens.
                        It's about control skill; this is a motorized dance for joy and not Russian roulette.

                        Comment


                        • #13
                          Re: Caliper seal direction

                          Does anyone know whether the Tokiko 4-pot radial calipers for a 2006 GSXR 1000 also have a taper to their seals?

                          Now I have to take them all apart again and confirm whether I put them in correctly before I got this magnifying lens.
                          It's about control skill; this is a motorized dance for joy and not Russian roulette.

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                          • #14
                            Re: Caliper seal direction

                            Thanks for posting this up man!

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                            • #15
                              Re: Caliper seal direction

                              I took them all back out to verify they were correct. On some it is nearly immpossible to tell.
                              It's about control skill; this is a motorized dance for joy and not Russian roulette.

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