Was happily riding along compressing the fork on a downslope and it went "pop". The grey wiper seal on the LHS lower had popped out and all positive pressure was lost. I managed to jam the seal back in with a multi tool and pump the fork to get home but the seal popped out again on the next ride.
Is this seal just a press fit or is it glued in place? Although the seal looks in good condition, i suppose it may be deformed in some way and need replacing. Is there anything else likely to be wrong? I never stripped an air fork before and I'm slightly surprised if the entire positive pressure is contained by this seal. Sounds to me like I have a further problem.