How to adjust valve on 2004 Saab 9-3

Would like to know procedure to adjust the valve on 04 Saab 9-3, What’s the number of gauge?

Have you some where found a schedule telling you that this is a maintenance activity? or are you taking on the adjustment of hydraulic valves in an attempt to solve some other problem? My manual fades away by 2004 but they were listed as hydraulic in 2002.

Agreed; these should be hydraulics. Wonder if one is tapping due to sticking, sludging, etc.?