Hydraulics advice required

[Wightdiver]

Hi All

I am carrying out a through refit on Red Dog this winter including a new deck so brace yourselves for more daft questions!

As you can see from the picture the hydraulic steering cables require replacing, a few questions on this topic.

1 Is it possible to get the crimped collar in stainless or some other non rusting material, if, as I suspect this is not possible any suggestions as to how to stop them rusting?

2 Is it possible to have the same fittings on a smaller diameter pipe, if so would a smaller diameter pipe have a detrimental effect on steering the boat?

Thanks in advance.

Andy

[Jon Tallis]

Can't comment on the diameter question but in the absence of OEM hoses with stainless collars you could always try your local hydraulic hose supplier

[Wightdiver]

Originally Posted by Jon Tallis

Can't comment on the diameter question but in the absence of OEM hoses with stainless collars you could always try your local hydraulic hose supplier

Thanks Jon

[beamishken]

You can buy prety much any size hydraulic fittings in stainless we used stainless fittings throughout subsea equipment in prety much every combination. The hose is usually matched to the fitting size but you may find reducers available to allow use of smaller hoses. Probably little detriment to use thinner hoses as its likely very low flow & comparatively short runs but maybe worth checking the flow rate. If you can find a hydraulics supplier that services the oil industry they will likely be able to supply everything in stainless. Hydrasun was who we used if your close to one of their branches

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[Wightdiver]

Originally Posted by beamishken

You can buy prety much any size hydraulic fittings in stainless we used stainless fittings throughout subsea equipment in prety much every combination. The hose is usually matched to the fitting size but you may find reducers available to allow use of smaller hoses. Probably little detriment to use thinner hoses as its likely very low flow & comparatively short runs but maybe worth checking the flow rate. If you can find a hydraulics supplier that services the oil industry they will likely be able to supply everything in stainless. Hydrasun was who we used if your close to one of their branches

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Many thanks, I will take a look to see if there are any Hydrasun branches near me.

Andy

[beamishken]

Originally Posted by Wightdiver

Many thanks, I will take a look to see if there are any Hydrasun branches near me.



Andy

Hydraquip might have a branch close & flowfit do a lot of mail order stuff but I'm sure google will find you somewhere local, often far easier to walk into a branch with what you have if your unsure. I try to avoid pirtek if I can

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[Wightdiver]

Originally Posted by beamishken

Hydraquip might have a branch close & flowfit do a lot of mail order stuff but I'm sure google will find you somewhere local, often far easier to walk into a branch with what you have if your unsure. I try to avoid pirtek if I can

Sent from my SM-G950F using RIB Net mobile app

Hydraquip have branch in Southampton, I totally agree, going into a branch and discussing options is always a good idea when you are not sure what you want and what is available.

[Nasher]

I use Hyphose in Farlington for work, and they've also made several pairs of boat steering hoses for me over the years.

Yes they have Stainless fittings available, and are a little easier to for you than Southampton.

[Wightdiver]

Originally Posted by Nasher

I use Hyphose in Farlington for work, and they've also made several pairs of boat steering hoses for me over the years.

Yes they have Stainless fittings available, and are a little easier to for you than Southampton.

Thanks Nasher, I will give them a try, as you obviously have experience of working with Hydraulics do you have any view on the question of reducing the hose size?

Andy

[jeffstevens763@g]

Originally Posted by Nasher

I use Hyphose in Farlington for work, and they've also made several pairs of boat steering hoses for me over the years.

Yes they have Stainless fittings available, and are a little easier to for you than Southampton.

+1 used hyphose years ago fitting out dive systems all stainless fittings

[Nasher]

Originally Posted by Wightdiver

Thanks Nasher, I will give them a try, as you obviously have experience of working with Hydraulics do you have any view on the question of reducing the hose size?

Andy

You may find that there is a minimum size hose that will fit the end fittings you need.

Personally I wouldn't reduce the hose size, although in a steering situation you'll probably be OK.

The reason I wouldn't do it is simply a case of managing to move enough fluid through the hose quickly enough to move the slave cyl.

The pump will move the same volume of fluid per turn regardless of the hose size, but with a smaller hose it will need to move it at greater pressure and speed to transfer that volume from pump to slave and back the other way.

To create the additional pressure/speed you'd find the wheel would feel harder to turn and could limit the speed at which you could spin it when required, and the resistance will get greater the faster you try to turn it.
By how much it will feel harder to turn will depend on the pump, hose size, etc.

With a nice large Hose size the difference in resistance to turning will be less comparing turning the wheel fast or slow.

The pump and/or slave cyl manufacturer will no doubt have a spec for the hose required, and it would be best to stick to it.

[GuyC]

I used Hampshire Hose when I changed all the fixed hoses on my Pac 22.

Hampshire Hose Services Ltd - The most comprehensive range of hydraulic and pneumatic fittings available from a single source.

They were OK and could do what I wanted but as it was slightly out of the ordinary, I did have to hold their hand somewhat. I'd certainly go and speak to them as they are not too far away.

[GuyC]

Originally Posted by Wightdiver

1 Is it possible to get the crimped collar in stainless or some other non rusting material, if, as I suspect this is not possible any suggestions as to how to stop them rusting?

You could try this stuff

https://denso-tape.co.uk/products/denso-tape

[Pikey Dave]

Originally Posted by GuyC

You could try this stuff



https://denso-tape.co.uk/products/denso-tape

Or this, my “goto” corrosion protectant.

https://www.specialised-aerosols.co.uk/METECT

[Orwell boy]

Is this a standard hydraulic steering set up ,baystar ,seastar ,ultraflex of uflex ? or is it aux pump and standard hydraulic hoses ? ,i would think the hardest thing is to find a supplier of the right type of thread etc ,the main steering manufacturers tend to use the less common varients and some hose manufacturers tend to be affiliated to certain brands etc ,most of them in my neck of the woods get a little confused if you start to talk about anything other than a digger bucket ,
Try and find the fitting type ie JIC and ring before treading the path to your local dealer ,otherwise you will be at the mercy of the local premium price and will be cheaper and better to buy the manufacterers (oem) parts imo

[Wightdiver]

Thanks to all that have taken the time to reply, I plan to go with Stainless fittings if possible, I will keep you updated.

As an aside, take a look at the attached picture, the power of the internet!!!

Interesting read.

Andy