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Old 03-06-2017, 07:40   #1
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Hydraulic Steering Poor

Just started crewing on a Prout Quest 31. First multi hull. Found turning circle v poor and hydraulic system seemed to have no end stop - wheel turned rudder but just kept going round and round. Suspect I might not be getting full lock and have a leak internally within the system. The system is holding pressure. I'm the new boy so what should I politely suggest to the old hand maintenance guy on the team?
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Old 03-06-2017, 07:57   #2
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Re: Hydraulic Steering Poor

Several items comes to mind. There could be a bypass from wear/age in the pump or cylinder. Is there a pressure relief valve, that could have a broken spring or some dirt in the ball check.

The only way to know for sure is to pull each piece and bench test them. If so, prepare your job for fluid control with drain pans, hose plugs and absorbent pads. Things could get messy.
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Old 04-06-2017, 23:50   #3
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Re: Hydraulic Steering Poor

Thanks. That was my thinking to. Not sure how to break the news to the maintenance guy. I am correct that hydraulic steering should have a positive end stop?
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Old 05-06-2017, 03:01   #4
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Re: Hydraulic Steering Poor

Yes ,my Hynautic system does.
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Old 05-06-2017, 03:42   #5
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Re: Hydraulic Steering Poor

Greetings and welcome aboard the CF, Sealegger.
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Old 05-06-2017, 04:12   #6
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Re: Hydraulic Steering Poor

I would just tell the maintenance guy what you experienced. Perhaps he already knows what is going on if he has been maintaining the boat for a while. Also, you can easily check yourself if the rudder is going all the way over by looking at the tiller arms that turn the rudders.

It's possible the hydraulic steering has a pressure relief valve that bypasses the steering cylinder when the rudder reaches the stops. A steering pump can create high pressure and some systems utilize a pressure relief to prevent stressing the system when novice helmsman keep trying to turn the rudder too far.

Hynautic systems have a pair of bypass valves. If your boat uses an older hynautic then perhaps they have come loose and just need to be snugged up.
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Old 05-06-2017, 07:50   #7
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Re: Hydraulic Steering Poor

Check the fluid reservoir and make sure the fluid is topped up. Low fluid level will pull air into the system, and give the wheel a light feel and seem to turn a long time, and the rudders will not go full over.
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