Pressure gauge on my pump stuck at one value, what is wrong? I have a Specialized Switch Hitter I have used for several years on both Presta and Schrader valves. Recently, my wife tried to inflate her tubes (Schrader valve) and could not get the pump to function. When I tried on my Presta valves, I experienced the same odd behavior she did, namely:


The handle requires too much force to depress when the chuck is on the valve.
The inline gauge registers a constant zero.
The valve is letting air out. I can let air out of the tube easily by bleeding off pressure using the little release valve on the handle.
When the chuck is not engaged with a valve, I can pump normally. I can't keep my finger on the chuck to build up any pressure, but air is definitely coming out.


I managed to partially fix the problem by disassembling the head and reassembling it, but now the inline pressure gauge is stuck at 60 psi even if I put enough air into it to get a tire to 130 psi. Does anybody know what might cause this problem?
Considering it's supposed to be sealed you can get quite a lot of muck in a pressure gauge -- maybe dirt collected on the valve.  That's probably what's causing your gauge to stick. The cause of the initial head jamming may have been similar.

I lost a tyre to a blowout when the gauge on my Road Morph was very reluctant to go up.  I took the gauge to bits (one rather subtle screw/cap which also allows me to set the zero point) and cleaned the spring, the piston and the scale that shows through the window. I didn't oil/grease anything, as the piston felt like it hadn't been greased to start with. It seems to move freely now.