Fotoman
Guru
- Joined
- Nov 12, 2009
- Messages
- 649
I think it's a shuttle valve (lockout valve) necessary if you have two steering stations (AP pump included). Otherwise, with a single station, you don't need it and will "feel" the rudder.
That part looks similar to the relief valve on my hynautic system. On my system it is also used for purging air. See the attached Hynautic document.
You will probably find in your installation the device is nothing more than a manifold block used to provide a convenient means to solidly mount and terminate the fixed hard lines and transition to the flexible hoses supplying the steering cylinder.
Easy enough to confirm, how many connections does it have? Does it have blanking plugs to close a spool bore or relief valve adustment shafts? Does it have 4 tube fittings or 5?
that in fact is pressure relief valve.