Joe Blow Pump Issue

bilsea159
bilsea159 Posts: 256
edited June 2016 in Workshop
My Joe Blow Pump doesn't seem to like valve stems without threads as when pumping up tyres it blows off the valve at around 60psi and no amount of reseating or locking down the lock tab seems to help. All is fine if inner tubes are threaded. Any thoughts please?

Comments

  • dgunthor
    dgunthor Posts: 644
    worn rubber? (replacements are available)

    think you can adjust the pressure on the rubber too IIRC
  • meanredspider
    meanredspider Posts: 12,337
    You can also buy different heads. The head on the pricier ones is nicer than the cheaper one
    ROAD < Scott Foil HMX Di2, Volagi Liscio Di2, Jamis Renegade Elite Di2, Cube Reaction Race > ROUGH
  • johnmiosh
    johnmiosh Posts: 211
    Using the pump on threaded valves wears the rubber away slowly. I got this replacement kit. Now 11 bar on unthreaded valve on track tubs is no longer a problem

    http://www.jejamescycles.co.uk/topeak-j ... oC3rbw_wcB
  • singleton
    singleton Posts: 2,523
    I have a Joe Blow Sport and I can confirm that it works fine with unthreaded valve stems.
    Maybe something needs replacing on yours.

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