All systems are a bit different however I recall
the Capilano system not giving when hard over. Some systems will have pressure relief valves in the system that will allow bypass of fluid. It could also be a sign of leak by in the cylinder or helm
pump or possible air in the system. Does the helm
hold steady when motoring or sailing? or do you find you keep having to turn the wheel slowly in the same direction to stay on course? If you do then you have a leaky seal in the helm of cylinder. If it feels a bit mushy it could be air. Check the fluid level in the helm for starters and make sure it is topped up. Bleeding can be a pain in the ass more so if your system is not set up with bleed bypass valves. Try calling teleflex and talking to a tech there I have found them very helpful in the past.