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Hynautic Hydrauliс Controls

Discussion in 'Technical Discussion' started by SplashFl, Oct 9, 2024.

  1. SplashFl

    SplashFl Senior Member

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  2. SplashFl

    SplashFl Senior Member

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    Located a manual on the system that showed a little filter but as in my other post, nothing was there after removing the 1" cap at the bottom.
  3. Capt Ralph

    Capt Ralph Senior Member

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    Check back to the other thread.
  4. Capt J

    Capt J Senior Member

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    Sorry it's 954-895-487nine. The filter is usually a S/S mesh screen if I remember correctly.
  5. SplashFl

    SplashFl Senior Member

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    Thanks. Woke him up. Said will call back. I wish I found a clogged screen but there was none.
  6. SplashFl

    SplashFl Senior Member

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    Called back and said he's not worked on them in "20 years" so not the right guy.
  7. Capt J

    Capt J Senior Member

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    He'd work on them for me, but I send him a ton of business every year for the past 20 years. None of us have worked on Hynautics in 20 years, they're practically extinct down here just like detroits. That being said he mentioned that you mentioned all of your stations are stiff, I've usually found a stainless screen in the bottom of the resevoir but in the fitting that screws onto the bottom of the resevoir. But, it all of the stations are stiff, the commonality is at the motors and gears. They may have a filter in each actuator as well or in a block where all the lines go into may also have a filter. Are all of the stations working? Are they all equally stiff? Both gears and throttles? How long have they been stiff? It's been 20 years since I messed with Hynautic also so trying to go by memory. You know it's probably more cost effective to rip out all of the hynautic and go with electronic controls for the helm and tower and do away with the other stations, when you consider everyone's hourly rate and hunting down and ordering hynautic parts. Because by the time you're done screwing around with the Hynautic to get everything right, you'll have spent as much. It's obsolete and any parts needed in the future will be impossible to obtain........
    Last edited: Jan 30, 2025
  8. SplashFl

    SplashFl Senior Member

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    I hear you re: Detroit's. Had a pair in the previous 38 Bert and although no major issues ever arose with them, became extremely difficult to find a top mechanic so continued to use a guy who had moved way up to Live Oak. many hours away. At this time I'm not aware of a more modern hydraulic system to even consider replacing the Hynautic with and after a bad lightening related experience with electric have no interest in changing to any of them and of course cables are out so back to making these as they should be and a couple others have posted how easy they should be as I also remember the ones were on a Striker back in a former life time.
    Had a suggestion late yesterday to disconnect one of the actuators on either an engine or transmission to see if that makes any difference so that's on my to do list this AM and while at it will look for a filter down there. I did notice when trying all 3 stations yesterday the ones on the tower were a little more difficult to operate then the bridge and the ones in the cockpit even more so. Would not want any less then those 3 stations. No idea how long they've been this way since my ownership only goes back to around 2 years but after not finding any filter where shown in the "distribution block" thing under the "pressure tank" as shown in the manual, I suspect someone may have previously messed with the system; that and after reading another's post learned their fluid had turned black and mine is a light amber I suspect it had been changed. Thanks for the support.
  9. SplashFl

    SplashFl Senior Member

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    UPDATE: Was only able to access the port transmission actuator. The issue; at least with that one; is not with the linkage nor did I find an obvious place for a screen or filter down there, so until such time as either a mechanic familiar with Hynautic is able to work on the system or there's other reason to remove salon floor sections, I'll have to live with the situation. :(
  10. Capt J

    Capt J Senior Member

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    The filters are inside the system, nothing more than metal screens, you will not see them unless you start dissassembling things. They're not external filters that screw on. Trust me when I tell you this, electronic controls are very reliable these days and I'd rip out those antiquated controls quicker than quick and replace them, you're going to spend a lot of money trying to fix them.
  11. SplashFl

    SplashFl Senior Member

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    Lightning hit a boat 2 homes west of me and wiped out the electric controls on my previous boat. I talked to Glendening about their controls but they did not offer any cable back up in the event of electric failure. I will say when I repowered the now sold Contender I opted for a pair of electronic Suzuki's and the electric controls were a 1000% improvement over the cable set up in the old Yamaha's. Their performance was another story so I sold the boat. Maybe come the next boat show I'll explore replacing the Hynautic.
  12. motoryachtlover

    motoryachtlover Senior Member

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    Splash search the forum for my post about retrofitting electronic controls on a mechanical engine. I think you will find it helpful. My memory is suspect but I believe Glendenning at that time offered a mechanical backup. To help in your decision I believe to rebuild my single station system was $14,000. I like you didn’t like the lightning vuneralability and the low voltage gremlins that would pop up at the worst times. Maybe that has all been worked out.
    SplashFl likes this.
  13. Capt J

    Capt J Senior Member

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    Everything on your Hynautic system is 30+ years old and very very prone to failure at this point. You have 100's of feet of hydraulic hose that is past it's lifespan......if that breaks anywhere, and I mean anywhere, you just lost everything. Maybe even lost it stuck in gear!!!!! You can figure out a way to get things moving if you lose electronic controls, shift gears manually in ER, etc...... Hynautic is so passed it's lifespan you can't really even find replacement parts to keep it up and running. I've been down this road a bunch of times on yachts and it's time to just retrofit, otherwise you end up spending a ton of money and still have old junk that's ready to fail........and end up retrofitting electronic controls 1-2 years down the road after you've already dumped that same money on fixing the hynautic, then a year later fixing something else on it, and etc.