Fyn brag - not quite

[rudi.hinze]

Thank you oom Grips! To make life interesting I am going full hydraulic steering. I knew I had a nice US orbital steering unit lying around and quite a few cylinders, little did I know that in my pile the beat to death, angle iron to shaft welded, abused and totally unloved cylinder at the bottom of the pile would work as if designed for the thing and basically be a bolt in with the correct stroke and tube diameter.. Reenen will be proud if he sees the thing I am using.

With a fat smile I took it to the hydraulic shop to treat it with new seals, a rear spherical joint and cancelled my PSC order.

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[grips]

We need more pic`s

[grips]

We need more pic`s Think Hydraulic steering is the way to go on that Monster of yours.

[rudi.hinze]

Will do oom. Got the quote today to seal the cylinder, almost half the cost of a new one. Ordered a new one to be built for me instead. It will run a rod end/rose joint one side and a spherical bearing on the other. Basic sums show with the pump and orbital the cylinder can move 2 tonnes. I should have light steering.

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[rudi.hinze]

Tried to make some time this week and got the custom steering cylinder made. I thought I knew a few things about these things. The old oomie who built it for me made me realise I know very little.

Off the top of his head he calculated flow and necessary restriction rates, including designing bypasses in the shaft itself at its two ends (to eliminate a bypass valve requirement and also, to slow down the cylinder at the respective stroke ends).

Even with 200 bar pressure she performs flawlessly and as designed. Not much to look at (it's just been primered at my request) but features spherical joints at each end, a 202mm stroke and a guesstimated 6-8mm wall thickness cylinder tube (specced as such given that it may eat rocks) -





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[rudi.hinze]

Finally got around to plumbing, mocking up and testing the steering. Very precise (thus slow), light and functioning perfectly. I am impressed that I got full hydro right the first time out.

Took a video but no photos.

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[Mad Manny]

Following this Thread patiently & passionately...

[Johannes]

Very nice thread !!

[grips]

Rudi what hydraulic pump did you use to drive the system?
Keep up the good work.

[rudi.hinze]

Thanks for the kind words! Sorry, wanted to take pictures today but it turned into a crazy one (in the good sense).

Oom Grips, the system is specced to run on a factory GM P series Saginaw pump. If I find it struggling to cope, PSC makes a nice hi-flow bolt-on pump.

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[KurtG]

Jirre, I like it when you guys talk foreign

[grips]

Thanks for the kind words! Sorry, wanted to take pictures today but it turned into a crazy one (in the good sense).

Oom Grips, the system is specced to run on a factory GM P series Saginaw pump. If I find it struggling to cope, PSC makes a nice hi-flow bolt-on pump.

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Thanks Rudi. I happen to have Saginaw pump. Someone installed a Saginaw pump and steering box on the old F250. I took it off because I have never seen something welded so badly to a chassis.

[rudi.hinze]

Thanks for the kind words! Sorry, wanted to take pictures today but it turned into a crazy one (in the good sense).

Oom Grips, the system is specced to run on a factory GM P series Saginaw pump. If I find it struggling to cope, PSC makes a nice hi-flow bolt-on pump.

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Thanks Rudi. I happen to have Saginaw pump. Someone installed a Saginaw pump and steering box on the old F250. I took it off because I have never seen something welded so badly to a chassis.

Eish, welding a cast box to a chassis which flexes is not good.

If you want to go full hydro (ideal for a toy only), let me know and I can connect you to my cylinder builder

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