what's happening in this video:
I pump the fork up and it gets to about 50 psi, makes a creaking sound and then the needle drops to zero. If I put a little more air in it does the same thing. When I let air out, it makes a fairly loud creak, kind of like a spoke pinging.
any ideas? fork is a Marzocchi SL 700 XC Retro. It's on the gf's bike...bought it off a forum member...never had an air fork, so I know very little about them.
Thanks for any help