I've bought a floor pump which doesn't have a Presta nozzle, only a Schrader one, and it comes with an Presta to Schrader adapter included. The pump has an integrated gauge, up to 160 psi.
My bike, currently, has one tube with a Schrader valve and another with a Presta valve. I've pumped them both with success, however the gauge only works with the Schrader valve.
To pump the tube with Presta valve, I removed the cap, loosened the nut, pushed the pin to let most of the air out of the tube. Then I "screwed" the adapter on the valve, connected the pump and pumped. Is my pump or adapter broken, or am I using the pump in the wrong way?