Viewing 19 posts - 1 through 19 (of 19 total)
  • Headset fails!
  • lucero
    Free Member

    Hi all,

    Got a Production Privee Shan 917 frame and have built the bike up. I got the PP Headset too and a DVO Fork.

    I can’t seem to get the headset adjustment right. This is what I’ve done:

    Crown race on fork (it just slid on, didn’t need to bash it down)
    Lower bearing with the chamfered edge facing up (into bottom of headtube).
    Fork in
    Top bearing slid over fork steerer and inplace
    Little black race on top of that
    Headset top cap
    Spacers
    Stem.
    I’ve tightened the star fangled nut
    tightened the stem.

    I keep seeming to get rock in the headset, either either holding the front brake, or if not, the steering has a bit of drag in it or feels very tight. The top cap also seems to rock back and forward a bit as I rock the bike.

    Not really sure what I’ve done wrong. I’ve ordered another PP headset as when I opened this one, it fell all over the place and I wasn’t sure I had the install in the right way around.

    Thanks

    rocketman
    Free Member

    Top bearing slid over fork steerer and inplace
    Little black race on top of that
    Headset top cap

    Is there a tapered collar somewhere in there?

    Leku
    Free Member

    Is the top cap clear of the top of the steerer? Headset top caps often sit deeper and need to be a couple of mm clear of the top of the steerer.
    ?

    tthew
    Full Member

    Have you got enough spacers? Could be the top cap tightening on the top of the steerer tube rather than loading the bearing. Try another 2.5 or 5mm spacer in the stack.

    pictonroad
    Full Member

    tapered collar bit missing I reckon

    Stevet1
    Free Member

    Crown race on fork (it just slid on, didn’t need to bash it down)

    Really? Unless it was a split race (don’t start at the back) then this seems very unusual, if not a little bit suspect. You sure its all the way down?

    wwaswas
    Full Member

    Crown race on fork (it just slid on, didn’t need to bash it down)

    I wonder if this is the tapered collar people say is missing?

    If only there was a thread to find out if headsets came with crown race.

    thisisnotaspoon
    Free Member

    I wonder if this is the tapered collar people say is missing?

    It’s tapered, so that’d be an achievement!

    Regardless there’s a pic here of the bits

    Headset cap
    tapered race doodahhh (you can see it on top of the bearing in the pic)
    Bearing
    ][
    Headtube
    []
    Bearing
    Crown race

    wwaswas
    Full Member

    Crown race often has the same chamfer angle on it as the tapered bit that goes in the top bearing.

    lucero
    Free Member

    Thanks all,

    Ok so I’ve assembled it correctly. Yes the crown race has a split in it.

    I’ve noticed, last night, that the SFN hasn’t gone in directly down, so some of the tabs are not bent up properly in the steerer tube.

    I’ve ordered a new one and bit the bullet on the Park SFN tool (I know many DIY methods for the SFN, but I am obviously incapable. That will set the SFN to the right depth. I have two spacers then stem and the steerer sits about 2-3mm below the top of the stem.

    Nobeerinthefridge
    Free Member

    On the off chance, are the steerer tube spacers alu or plastic? my canyon came with a couple of plastic spacers, and no amount of faffing would get rid of the same issue you have.

    Ended up fitting alu spacers and it’s been fine since.

    Del
    Full Member

    my bet is the top cap bottoming out on the top of the steerer. either hack a few mm more off the steerer or put another spacer in as suggested up there ^
    oo – hang on though – you can get it to feel too tight?
    check for play with the wheel perpendicular to the frame as you nip up the top cap. pads knocking about in the caliper can mimic the feel of a loose headset if the wheel is in line with the frame.

    lucero
    Free Member

    No its defo headset as you can see the cap over the top bearing move forwards and backwards.

    I’ll replace the SFN (I did order another headset too, just to be on the safe side), so might just start again.

    pictonroad
    Full Member

    Are you missing the collar bit like the black one in the middle above? That’s what I meant by tapered collar, I suspect this would cause it to rock back and forth.

    ghostlymachine
    Free Member

    Top bearing slid over fork steerer and inplace
    Little black race on top of that
    Headset top cap

    I think the “Little black race” is the compression ring.

    lucero
    Free Member

    No that’s there, sat in the top bearing. Its black, you can see it in the PP headset pic above. 3rd in from the left, sat on top of the top bearing.

    I do remember seeing a silver one, very similar, which I think came with the headset. But it didn’t really seem to go anywhere.

    Basically the PP headset picture above is exactly whats on the bike, from left to right:
    Crown Race, that way up, on the fork
    Lower Bearing, that way up on the form
    HeadTube
    Top bearing (that way up (ie, angled part downwards)
    Compression ring thing
    Headset Cap

    There were two very thin silver spacers which I think are only there to allow the Headset cap to turn, and a black O ring.

    lucero
    Free Member

    Fixed it.

    The silver thing I remember seeing was actually a top pressed cap which formed part of the top bearing.

    I installed the SFN with the correct tool, and replaced all the HS components with the new one and it’s 100% perfect.

    Thanks all for the help

    RustyNissanPrairie
    Full Member

    “Production Privee Shan 917 frame and a DVO Fork.”

    We need pics!!!

    lucero
    Free Member

    hah, of course!

    Spec:
    Shan 917 XL
    DVO Diamond Forks
    XT 1 x 11 Groupset
    XT 180mm rotors
    NukeProof 780mm bars
    Chromag Ranger V2 Stem
    Wheels Manufacturing BB92
    Stans Flow EX rims on Hope Pro 2 hubs
    Hope Seat Clamp
    DMR V12 Peddles

Viewing 19 posts - 1 through 19 (of 19 total)

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