Bought a second hand pump for a good deal model PFP-7 which is now discontinued and has no parts diagram available and wondering if anyone could help dealing with an issue i've been having ; the pump will inflate tires but the handle comes up by itself when it builds up pressure and the gauge will only read if i press and hold down ..lose reading when i let go !
So i have been looking online for help , i took it apart multiple times to try and figure out whats going on and everything seems ok without any worn out or missing parts i'm confused , i was also looking if maybe it has an integrated check valve or something that would prevent the air from pushing back on the handle and keeping pressure gauge readings but to no avail - it should be a simple fix right ..well , what do you guys think !?