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  • Quick question, disk brakes. Please help.

     tomlevell updated 12 years, 2 months ago 5 Members · 10 Posts
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  • Gunner

    12 March 2009 at 7:36 pm

    My chum has a 2 year old Scott Hardtail, the other day he got a lift home from out Redcar way, and had to remove his front wheel to put his bike in the back of a friends car, along with the guys bike who he was riding with.

    On replacing his front wheel, the pads seem to be locked on to a degree, and the brake lever is moving freely with no effect whatsover, and no pressure.

    There seems to be traces of oil on the brake housing…….

    What could have caused this?

    As you know I’m new to disc brakes and haven’t had enough experience of them yet to be of any help.

  • Dave F

    12 March 2009 at 7:41 pm

    Sounds like he’s pulled on the lever when the wheel was off – and this will have pushed out the pads. Take off the wheel and use a flat head screwdriver to open the gap between the pads (ie to push the piston back into the caliper body)

  • johnc

    12 March 2009 at 7:48 pm

    when i put mine in the car, and take the front wheel off i put a pad spacer in the caliper just incase the lever gets pressed

  • Gunner

    12 March 2009 at 7:48 pm

    That’s what I thought, will what you suggest rectify the situation, and cause the brake lever, etc., to operate normally.

    I could only have a very quick look as we were changing shifts at work, he has now taken the bike into Westbrooks for repair, but the mechanic had phoned in sick and he won’t get the bike back ’till Monday now, and I’m keen to know what was wrong.

    Why was there fluid on the brake housing?

  • Dave F

    12 March 2009 at 7:53 pm

    By brake housing, do you mean the handle or the caliper?

    If its on the caliper, it may be that he’s popped the piston out – in which case it’ll need putting back in and probably a full oil change.

    If it’s at the lever end I’m not sure (we might need Tom Levell on that one!)

  • Gunner

    12 March 2009 at 8:09 pm

    Caliper end not lever.


  • mr-marty-martin

    12 March 2009 at 8:20 pm

    yeh this happened to me… and abit of oil did come out…

    then trying to get them apart one of the whole pistones fell out, and lost a bit of oil 😳

    and it was the day before a race 🙄 😆

    i still havnt changed my oil 😆

  • Dave F

    12 March 2009 at 8:36 pm

    I think it’s a piston out incident – new oil please!

  • Gunner

    12 March 2009 at 8:47 pm


    I’ll post when the mechanics have got back to him about what it actually is 🙂

  • tomlevell

    13 March 2009 at 10:52 am

    It’s only because I’ve caused most of the problems to myself already ;0)

    After doing the above topping the oil up and encouraging any air out through the lever should sort it. Mind it might be worth a full oil change but I’m normally too lazy to do that.

    I managed to split a hose yesterday. Lost fluid last week but couldn’t see why then squeezed the lever really hard to the bars a few times and it blebbed and fluid shot across the room. Luckily I stole a caliper and hose off another bike and slotted that in to the lever. It does mean the other bike is now further away from being working again.

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