On Friday, July 20, 2018 at 10:34:54 AM UTC-7, Andre Jute wrote:
On Saturday, February 4, 2006 at 12:20:58 AM UTC, Brad Ford wrote:
I've got a cool little Wrench Force floor pump that will accept
Schrader or Presta. I've used it for over a year exclusively to
inflate my Presta road tubes. Got the kids bikes for Christmas, pumped
them up (Schrader valves), and now (several weeks later) the pump won't
blow air out the Presta hole any more. It's supposed to be "auto
sensing". Is it just buggered? What would you all try to debug this
problem?

Rather than all these tiresome workarounds, why not just buy an SKS Rennkompressor? Works right every time. Trusted by TdF mechanics. Fully rebuildable with universally available spares, as it has been for half a century.

Andre Jute
If it's good enough for me, it's good enough for you

The pump head isn't deep enough for the Presta valve so sometimes it doesn't form a seal if you have your bike in the stand. It most definitely IS a good pump but it does have some problems too. And you have to turn the "lock" in the correct direction for Presta or Schrader. Now that I've had that concussion it's sometimes difficult to remember which way locks which valve.