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Adding power steering, what do I need?


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#16 olcowhand ONLINE  

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Posted December 04, 2011 - 12:01 PM

Daniel, I have a couple forklifts that I am parting out. I need power steering for a couple of projects I'm working. Can the hydraulic steering off these be used on my Gt's? They are both true hydraulic steering, not power assist..


Yes, you should be able to do that. The 4 port orbital on my MF "2055" came off a large ice rink surfacer machine. The forklifts likely have 4 port orbitals, with a priority valve ahead of them, so you could possibly use them also. BUT, the priority valves are likely set to a much higher working pressure than what the GT's will work at. I'd love to have a couple forklifts for parts!
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#17 ducky ONLINE  

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Posted December 04, 2011 - 12:11 PM

Brian
I used a forklift Orbitol off a large forklift and it does a great job on my 4855 articulated. Running it off the Sunstrad hydro.
I see no problem. I have several more I plan on using on other tractor.
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#18 Texas Deere and Horse OFFLINE  

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Posted December 04, 2011 - 12:13 PM

The Hyster has a secondary pump, small in size that runs just the steering circut. I'm not sure how the Ele. AC lift is set up.

#19 skyrydr2 ONLINE  

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Posted December 04, 2011 - 12:13 PM

If they are Char-Lynn style orbital valves you might want to see what their volume per rev is? If it is a very large number, you may have a delay issue as it needs more volume than you can give it. As for blowing out seals in one of these, never happen at only 800-1000 psi , these are rated for much higher pressures.
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#20 Texas Deere and Horse OFFLINE  

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Posted December 04, 2011 - 12:22 PM

I will have to check on what brand they are. I have used Char-Lynn systems on several farm tractors that we have had over the years. Those were added in line on the steering shaft, you had to cut the column shaft and put them in.

#21 ducky ONLINE  

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Posted December 04, 2011 - 12:27 PM

The Hyster has a secondary pump, small in size that runs just the steering circut. I'm not sure how the Ele. AC lift is set up.

The old ICE trucks used priority valve for the steering and back in the early 90s they added a second pump. Sometimes a completely separate pump or a stacked pump or a pump with a priority valve incorporated. Electrics usually use a second pump/motor assy. That way it can be turn off when not steering (driving long straight stretches) and save battery life.
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#22 olcowhand ONLINE  

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Posted December 04, 2011 - 05:23 PM

If they are Char-Lynn style orbital valves you might want to see what their volume per rev is? If it is a very large number, you may have a delay issue as it needs more volume than you can give it. As for blowing out seals in one of these, never happen at only 800-1000 psi , these are rated for much higher pressures.


Mine on the Massey is a Char-Lynn unit, but I have no idea as to the model or volume. It works great on my MF though! Glad to know on the seal pressures, just going by word of caution from someone a long time ago. But if using an orbital from another GT, then the pressures may become an issue. Most GT orbitals are 5 port with built in priority, so these work perfect.

#23 skyrydr2 ONLINE  

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Posted December 04, 2011 - 06:02 PM

I have actually never heard of one blowing a seal because of too much pressure, but I have seen them blow out due to over heating and debree ruining the seal. (and a numb nut re-assembling one incorrectly)
JCB ,NH/Case Terex, all have models of TLB that return the priority oil back in line to maintain max volume because they don't use steering pumps , just use the smaller section of their main 2 section pump that they use for loader functions, then return even that oil to the hoe valve for maximum flow . Really cool stuff kids .
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#24 jdslednut ONLINE  

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Posted December 06, 2011 - 01:28 AM

So do I understand this right? A 4 port would need an additional priority valve (to work the best, but would work) and a 5 port contains the priority valve. Does anyone have a "hydraulics for dummies" sketch or diagram of how this may be plumbed. I assume most GTs would be similar but a diagram for a 314 Deere wouldn't the spot for me! I'm mostly researching this now so when my 314 is torn down this or next winter I might have an idea if it's feasible for me both financially and mechanically. I'm hoping to have a poor mans 318 by the time I'm done (dual brakes, h2 or h3 hydraulics with rear hydraulics, and power steering).

#25 Texas Deere and Horse OFFLINE  

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Posted December 06, 2011 - 03:53 PM

Here is what the Hyster has on it.

img013.jpg

Will this work OK?

And here is the system layout.


img014.jpg

Edited by Texas Deere and Horse, December 06, 2011 - 04:02 PM.
added info..

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#26 olcowhand ONLINE  

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Posted December 06, 2011 - 04:32 PM

That orbital looks just like what is on many GT's as original equipment. It should work just fine!
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#27 olcowhand ONLINE  

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Posted December 06, 2011 - 04:34 PM

And also, the column on it just bolts onto the top of the orbital, and the steering shaft goes into female splines in the orbital valve. If need be, you can shorten the column to whatever length you need, but looks about right as-is.

Edited by olcowhand, December 06, 2011 - 07:38 PM.
clarified....changed "pump" to "orbital valve"

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#28 Alc ONLINE  

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Posted December 06, 2011 - 07:34 PM

the steering shaft goes into female splines in the pump.

I thought I understood it but now I'm confused , does the orbital ( steering unit ? ) connect directly to the pump ?

#29 olcowhand ONLINE  

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Posted December 06, 2011 - 07:41 PM

I thought I understood it but now I'm confused , does the orbital ( steering unit ? ) connect directly to the pump ?


I corrected my terminology in my post. I changed "pump" to "orbital valve". Sorry for my brain farting!

#30 Alc ONLINE  

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Posted December 06, 2011 - 08:01 PM

Thanks , that makes sense , it seems like a very do-able up grade. Al




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