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Full Hydro or hydraulic assist?!

Yup, hahaha. PM Sent.

Anyhow, back to the hydro steering. I'm not scared of breaking a line and getting off the mountain and all that pansy talk. Ya can't have rockwells without hydro and I dont here those guys worried about losing steering.

So I was looking into using some tractor parts I can get my hands on since I work for Kubota Tractor Corp and our grand L 40 series tractors have a double ended ram with about 8-9" stroke and a 1 3/8 rod. The orbital valve we use has a relief valve in it that cracks at about 1800psi But the pump is pushin about 4.5GPMS. How much flow can you get outa a GM pump and still keep it reliable? The ram has a list price of $550 and the orbital valve lists for $900!!!! I'm sure there built better than anything you're going to get from a surplus place or maybe even Howe and PCS
 
mrdrinksalil said:
The orbital valve we use has a relief valve in it that cracks at about 1800psi But the pump is pushin about 4.5GPMS. How much flow can you get outa a GM pump and still keep it reliable?
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Stock GM "P" pumps make 1100-1450 psi and flow 2.4-3.5 GPM. When people "mod" one of these pumps, they are basically getting their pumps to flow at the high end of those specs.

The stock "P" pumps that flow 3.5 GPM are supposedly on medium duty trucks.

Specs are from here.
 
Can't be any worse then when this happens:

07_26_2005_018.sized.jpg
 
mnstrburbon said:
X2 and X 3 i lost 2 lukily in the street in front of my haouse and drive way i now havwe the xj shaft.
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Did you notice the steering box is no longer attached to the frame? All the bolts ripped out of the frame after my friend installed crossover steering.
 
yes i did and i also thought you where refering to the steering shaft alot of people say thats another reason why full hydro is better or worse. which ever side you are on and the no mechanical ataching of the steering to the axle.
 
There are a bazillion unpleasant ways to disable your truck. I wouldn't make the hydro-assist vs. full hydro decision based only on which one you think you can break easier.
 
I agree, but i am suprised noone has brought up the fact that if full-hydro fails at speed on the street you will have zero steering. Atleast on the trail you prob wont be driving very fast.

Im not suggesting you go with assist, i'm just sayin.:D
 
90'K5 said:
I agree, but i am suprised noone has brought up the fact that if full-hydro fails at speed on the street you will have zero steering. Atleast on the trail you prob wont be driving very fast.

Im not suggesting you go with assist, i'm just sayin.:D
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With full hydro, you will slowly lose steering power if you spring a leak in a steering line. If the pump goes out, you will still have steering; the steering valve will actually develop pressure when you turn the wheel.

There are lots of vehicles running down the road right now with full hydraulic steering, mostly medium duty trucks (trash trucks, some busses, etc.)

By the same right, if a draglink end fails on a mechanical steering setup you won't have any steering (and yes, that does happen).

Really, the hydro assist guys are the only ones with a double safe system.

However, as I said earlier in this thread, full hydro is generally pretty sketchy on the road and I wouldn't do it on a rig that saw any kind of street time.
 
Ok, im talked into the idea of full hydo but I'm gonna drive Gabes truck first. I am now trying to design a system with Kubota Tractor components that we buy from EATON. Hopefully I can get some parts from work.
 
38377k5 said:
With full hydro, you will slowly lose steering power if you spring a leak in a steering line. If the pump goes out, you will still have steering; the steering valve will actually develop pressure when you turn the wheel.

There are lots of vehicles running down the road right now with full hydraulic steering, mostly medium duty trucks (trash trucks, some busses, etc.)

By the same right, if a draglink end fails on a mechanical steering setup you won't have any steering (and yes, that does happen).
Click to expand...

Yes, i agree..but just as any other mechanical system failure that begins slowly, it can be over looked until is too late and dangerous.
 
I was watching a few of my wheelin' videos and figured this clip was relevant:



The front is a bit bound up and when I turned the wheel, the tires stayed where they were and the whole rearend of the buggy actually jumped over 6" or so (my steering is crossover/hydro assist with a 1.5" ram). That's plenty of steering power ;)
 
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mrdrinksalil said:
Ok, im talked into the idea of full hydo but I'm gonna drive Gabes truck first. I am now trying to design a system with Kubota Tractor components that we buy from EATON. Hopefully I can get some parts from work.
Click to expand...

I am running Full Hydro on my S10 Build. There is always going to be people who say A. it is Illegal. B. if it breaks your screwed... etc etc....

What about breaking a tie rod end or drag link? Then what?

I am running a Surplus Center 2.5x8" Double ended ram , and a 7.3Cu In Load Reactive valve. The valve is rebuilt by Midwest Directional Services , and I think I paid $210 shipped. With a Warranty. The ram was like $200. PM me if I can help with sourcing stuff for ya.

Here is the ram...
http://surpluscenter.com/item.asp?UID=2008040821543776&item=9-6688&catname=hydraulic
 
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