Viewing 20 posts - 1 through 20 (of 20 total)
  • Is my shock leaking?
  • Earl
    Free Member

    Fox Float.

    Before ride pump it to 250psi.
    Check it and it reads to 235psi.
    Check again 235/230psi

    Ride 15min
    Check it and its at 210psi – feels a softer than when I started.
    Pump it back to 250psi
    Check it and it reads to 235psi.
    Check again 235/230psi

    Ride 15min
    Check it and its at 210psi

    Do shocks slow leak in this way?

    wwaswas
    Full Member

    what it means is you lose 15psi re-attaching the pump to it…

    z1ppy
    Full Member

    take it off and put it in a bucket of water, if you see any bubbles it’s leaking.

    Otherwise as per wwaswas, your re-pressurise the pump when you re-attach it, hense you ‘supposed’ losses.
    Use your sag meansurement, not the air pressure to check for any air losses whilst riding.

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    Earl
    Free Member

    what it means is you lose 15psi re-attaching the pump to it…

    Maybe Im not explaining well. Feels firm when i start riding and soft 15min later. Repump and its firm again and soft 15min later.

    I though when seals go the whole shock collapses so I though i’d ask here.

    glenh
    Free Member

    It’s going soft as you keep attaching a pump to check it!

    Every time you attach a pump the pump has to fill with presurised air from the shock so you can read the presure from the dial.

    Pump it up, ride it for a few hours. If it hasn’t gone completely flat, it’s probabaly fine.

    Earl
    Free Member

    bucket of water – good idea.

    I’m only re-attaching the pump because it feels softer than when i started out. My arse is telling me that it’s loosing preasure – the pump is just telling me roughly how much.

    I have left it for a week unridden and it settles on about 200psi ie it doesn’t keep it preasure but doesn’t go completely flat either. From the replys here i’m assuming that 250psi is not out of range for a float.

    carlosg
    Free Member

    The schraeder valve seal in fox shocks does perish over time , when mine did I pinched one out of an old innertube and now it holds air fine (at least the last 12 months anyway)

    JonR
    Free Member

    I’m no expert but is it possible that an oil may warm up in a shock becoming less viscous and so the shock will feel slightly softer?

    pastcaring
    Free Member

    I’m no expert…

    it’s an air shock…

    Earl
    Free Member

    oil may warm up in a shock becoming less viscous and so the shock will feel slightly softer?

    i was thinking along those lines too but with the air warming up when riding but my logic is flawed as air expands when it gets warm.

    The schraeder valve seal in fox shocks does perish over time

    The shock is only a month old and hardly used so I don’t think the seal has had a chance to perish yet. But will have a look anyway.

    Thanks very much.

    coatesy
    Free Member

    We’ve had a few with slightly loose valves leaking, one leaking around the boost-can seal, but virtually none at the main seal, i’d check the valve first.Oil in these shocks will definitely become thinner as it heats up, but it takes a fair hammering to heat it enough to notice a difference.

    GiantJaunt
    Free Member

    If it’s a new shock it might be bedding in a bit and getting softer? I find my newish shock starts to feel softer a few hours into a ride without any loss of pressure but it’s a Giant shock. Don’t know much about Fox ones.

    elaineanne
    Free Member

    any nasty black oily stuff coming out ?

    MentalMickey
    Free Member

    To save taking it off and using a bucket off water, simply load the top of your finger with spit then carefully apply to the end of the valve, this should create a seal of fluid over the end which should give you the same answer.

    LoCo
    Free Member

    either:
    Loose/broken valve core check, tighten put in bucket of water with 300psi in shock.
    or
    main air seal may be worn allowing air into negative chamber if you let all the air out with shock out of frame does it ‘stick down’?

    JonR
    Free Member

    I’m no expert…

    it’s an air shock…

    So it is. Do air shocks require zero lubrication then? News to me and I wonder why my soon to be servoced air shock has oil coming out of it.

    pastcaring
    Free Member

    JonR – Member
    I’m no expert…
    it’s an air shock…

    So it is. Do air shocks require zero lubrication then? News to me and I wonder why my soon to be servoced air shock has oil coming out of it.

    there is a small amount of oil for lubrication. not enough to make a difference…

    coatesy
    Free Member

    Aye, small amount for lubrication,and a shock-shaft virtually full of it for damping duties.

    pastcaring
    Free Member

    coatesy – Member
    Aye, small amount for lubrication,and a shock-shaft virtually full of it for damping duties.

    but separate from the air chamber.no?

    coatesy
    Free Member

    Yup, seperate from the air(stops cavitation), but effectively stiffens the suspension by passing through the damping system, the more viscous the oil i.e. when cold, the stiffer the damper will feel.

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