Anyone familiar with Hynautics Hydraulic Steering?

[Pierce89]

Good morning, I am restoring a boat that with with Hynautic steering -- I believe the cylinder is a Hynautic K-10 (needing KS-07 seal kit) and the helm is an H-80 (HS-08 seal kit). The cylinder starboard seal is leaking and I figured I may as well replace all seals before installing.

For the helm, I saw a couple videos on the H-50 which should be similar enough to do the H-80. For the K-10 ram, I cannot find any walkthrough whatsoever. Is anyone familiar with this disassembly and reassembly of this model?

 

[dingbat]

Nothing special about any of the steering cylinders.

Shaft seals and orings are commercially available. Just tear it down and source the components individually.

 

[Pierce89]

Thanks do you know the best way/steps of removal to get to the seals? I've seen videos of removing nuts with a special wrench with pins for some models, and also videos of a slot that you remove a pin out of.other models. This model seems to have neither of them!

 

[dingbat]

Thanks do you know the best way/steps of removal to get to the seals? I've seen videos of removing nuts with a special wrench with pins for some models, and also videos of a slot that you remove a pin out of.other models. This model seems to have neither of them!

It appears to be a "sealed" (can't rebuild) cylinder although replacement cost is a bit steep for a throw away cylinder.

Have you tried twisting the end caps off the ends of the tube?

Replacement Parts — Ezy-Glide Inc.

www.ezyglide.com

 

[04fxdwgi25]

Never saw one before. Looks like a std seastar system with a handle that replaces the wheel, but has a 1/2 turn lock to lock ratio.

 

[Pierce89]

I would think it's not a sealed system only because the seals for the Hynautic K-10 are available for purchase online. Dometic Marine sent me the parts diagram attached but didn't respond when I asked how to disassemble it. I still haven't tried disassembly and was hoping someone may have some experience with it and could guide. I have a bit of time... still need to install my new fuel tank and deck from the 2nd picbefre tackling this

 

[dingbat]

I would think it's not a sealed system only because the seals for the Hynautic K-10 are available for purchase online. Dometic Marine sent me the parts diagram attached but didn't respond when I asked how to disassemble it. I still haven't tried disassembly and was hoping someone may have some experience with it and could guide. I have a bit of time... still need to install my new fuel tank and deck from the 2nd picbefre tackling this

Yep, the end caps screw off.

 

[Pierce89]

Thanks man I just bought the seals and will try this out

 

[Pierce89]

Follow up to these questions. Cylinder seals have arrived and I'll change them out this weekend. The helm fill screw has a warning "loss of steering may occur if purging instructions are not followed exactly". I can't find the manual online.

This model doesn't have a separate reservoir, just 2 hydraulic lines running from helm to cylinder. Can anyone please help with the steps to add hydraulic fluid and bleed?