Make/model of steering?
Assuming it's an Edson, they make several different types of systems. Vic showed a photo of one type on his post. I have a different type on my boat, a Radial Drive with a 13" dia. circular quadrant clamped to the rudder post.So you should specify which system you have when you go hunting for info.Edson has a lot of information available on-line that you can download & they are very helpful with info, parts etc.Vic mentioned the bolts that hold the compass housing to the pedestal: they may be seized and difficult to free. There were some posts about this problem recently & you may want to check the archived posts. The bolts are a non-magnetic stainless & thread into aluminum: they can be a real bear to get loose. An impact driver may help.When you replace them, you may want to use a tap to clean up the threads in the aluminum & use some Loctite or similar product to prevent them seizing again. Don't forget to use non-magnetic fasteners ( 316 S/S or equiv.)Once the compass housing is off and you can access the top end of the steering, I recommend that you stuff a rag down into the post, to catch any screws or little parts that may get away. If they drop to the bottom of the pedestal tube they can be very hard to recover. Other that that, with the Edson info to guide you, the only hassle is wriggling under the cockpit or in the lazarette to get at everything. Be patient. Good luck.