2008 marzocchi dj1

Paulkingk

Hi guys. I have the above fork on a Giant stp was wondering if anyone knew the recommended air pressure for it. With 30psi its pretty stiff more than that and its solid. My other forks by comparision foxf120 and sids take much more air. Are the dirt jump forks different. The marzocchi website is a bit rubbish. Also any good sources for servicing tips. Or a good site with lots of info about this fork. I.e. oil weights air pressure srvicing. They also make a small clunking noise which gets worse as I slow down the rebound. Help please!