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H14 Is Getting Power Steering


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#1 8tyman8 OFFLINE  

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Posted June 02, 2012 - 08:52 PM

so i was at the scrap yard today looking for a char-lynn steering valve after i looked on the computer and they are $500+ and i found a bolens push mower and a NOS deck that i should be getting shortly but thats off topic i found one on clark fork truck i looked but i did not see a power beyond port i asked the guy what he would like and he responded $25 so i got it i plan on putting a 3 spool valve 1 for hydraulic lift the other 2 are for future use (cough bedford bucket cough cough) so the valve will need to have power beyond i believe that i will have the power steering as last priority witch will suck but that does not matter that much as in that i will be going in a straight line using the other attachments and i decided that i will do a hydro swap with a eaton 11 and a oil cooler i have also took into concentration that i am using a double action single end cylinder so lets say it will turn 3 turns the one way and it will turn 2 1/2 the other how ever i need to cut grass for a fellow so i cant dig in to the project for 3-4 weeks also its a char-lynn 211 1002
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Edited by 8tyman8, August 29, 2012 - 09:04 PM.


#2 JDBrian OFFLINE  

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Posted June 03, 2012 - 05:42 AM

Sounds like a good price for something like that. I'm not an expert on these things but isn't power beyond just a feed through for the main pump flow. A tee in the line would do the same thing unless there was provision in the valve to turn the flow on and off. Will you be taking pics of this project for us. It sounds like an interesting project.

#3 KennyP OFFLINE  

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Posted June 03, 2012 - 05:46 AM

I'm like you, Brian! Don't totally understand these some of these terms!

#4 JDBrian OFFLINE  

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Posted June 03, 2012 - 06:08 AM

Hydraulics are a very interesting subject Kenny. I'm trying to learn as much as I can about it. When I went to school they didn't teach it in Industrial Arts. Now, where these programs have survived budget cuts, they teach basic hydraulics. I've dealt with high pressure (up to 6kpsi) low volume( ml/minute) pumping systems in Liquid Chromatography equipment at work for over 20yrs so I am familiar with the basic principals.

#5 MH81 ONLINE  

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Posted June 03, 2012 - 08:26 AM

Sounds like a great deal, looking forward to the build.

#6 8tyman8 OFFLINE  

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Posted June 03, 2012 - 11:47 AM

Sounds like a good price for something like that. I'm not an expert on these things but isn't power beyond just a feed through for the main pump flow. A tee in the line would do the same thing unless there was provision in the valve to turn the flow on and off. Will you be taking pics of this project for us. It sounds like an interesting project.

i have the steering valve and 2 bolens hydraulic valves i was going to use all the valves are open centers that allows the fluid to flow from the high pressure side to low with almost no resistance there are valves that are closed centers (like a electric power washer shuts off when builds pressure) the closed centers have alot of advantages such as lower operating temperatures smaller reservoir ext how ever this is a garden tractor and that not so use full i could hook all the valves up in series but that would the maximum back pressure for my eaton valve is 145 psi so it would need to be at the end of the circuit i am not sure what the max back pressure psi om my bolens valves are im new to hydraulics i do have a bit of knowledge of it but not much also the power beyond port puts the steering as high priority then the lift and such as last i not quite sure how it works but it does i think that you take high pressure from the power beyond and hook it to the spool valve then you plumd low pressure with a tee to the reservoir
cheers
8tyman8

#7 8tyman8 OFFLINE  

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Posted June 03, 2012 - 01:34 PM

getting the valve fitted to the steering coulomb got a bit crazy with the grinder thoIMG_0350.JPG IMG_0351.JPG IMG_0352.JPG IMG_0353.JPG IMG_0354.JPG IMG_0355.JPG IMG_0356.JPG
it fits quite well now i just need to talk to my old Machine shop teacher and ask him if he can make a 12 spline steering shaft or i though of getting a 12 point bolt that fits in it
cheers
8tyman8

Edited by 8tyman8, June 03, 2012 - 06:14 PM.


#8 8tyman8 OFFLINE  

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Posted June 21, 2012 - 04:38 PM

got the steering cylinder its 2" bore x 4" stroke got a ball end and a 3pt weld on ball just got to get it welded up
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#9 skyrydr2 OFFLINE  

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Posted June 21, 2012 - 05:31 PM

Ok, the Eaton 11 only flows 1.5 gpm max and has a max psi of 800 psi. Sooooo that steering valve needs to have pretty small volume per rev. Or it will always be cavitating . Also you can put that valve first asit will always have oil flowing through it to the return , and it can easily handle 1800 psi back preasure, but your steering cylinder needs to be small, like 1.5" so the pump can keep up. If you use a seprate pump then all will be fine and volume issues will go away as long as you have at least 3gpm.
Some food for thought....

#10 8tyman8 OFFLINE  

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Posted June 29, 2012 - 05:08 PM

Ok, the Eaton 11 only flows 1.5 gpm max and has a max psi of 800 psi. Sooooo that steering valve needs to have pretty small volume per rev. Or it will always be cavitating . Also you can put that valve first asit will always have oil flowing through it to the return , and it can easily handle 1800 psi back preasure, but your steering cylinder needs to be small, like 1.5" so the pump can keep up. If you use a seprate pump then all will be fine and volume issues will go away as long as you have at least 3gpm.
Some food for thought....

the valve is 5.9 ci per rotation and its 2-4 gpm input i think it should be fine cakes on mtf did the same and he used a similar valve i do not have room on the tractor for a extra pump unless it has a thru shaft thats 3/4 on each side also my cylinder is more like a 2'' bore but is 4'' stroke

#11 8tyman8 OFFLINE  

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Posted June 29, 2012 - 05:18 PM

so i got out to the scrap yard and i got the column that i forgot it was a bit bent when i got her i cut it down and will make it the right size .. on a lathe of course the face to face length must be 13" also the shaft has a commutator on it and there is a wire that runs up it for a horn so it might get a heated steering wheel
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#12 skyrydr2 OFFLINE  

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Posted June 29, 2012 - 06:47 PM

My steering valve is 3.84 ci per rev and at an idle can easily out run the pump turning the wheel, its fine at anything abouve idle though, and my cylinder is 1.625x5 . It might be ok, just need to try it and see :)

#13 JDBrian OFFLINE  

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Posted June 29, 2012 - 07:10 PM

Wouldn't a smaller cylinder be adequate in this application. A 2" cylinder with 800psi on it would have 2500lbs of push. That's enough to break things. A smaller cylinder would reduce the flow required from the pump to keep up with the steering inputs while still having adequate force available.
.

#14 8tyman8 OFFLINE  

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Posted July 04, 2012 - 09:54 PM

got the steering linkage made up its 3/4 solid round stock ball ends grd 8 bolts holding it on also welded up ball end on cylinder modified steering arm to work there is close call but no clearance issues it fits quite nicely looks almost factory next thing on the list is to fully weld every thing (just tacked with flux core welder) will get a good gas mig to finish it up now i need to make the steering column and lines .... i am a little concerned with the 4 port valve putting before the lift valves as being that eaton says Max back pressure is 305 psi and my release valve in my lift valve is set to 500 psi i am not really concerned about the flow aspect ... i have plans to add a HI flow pump for aux and steering also the cylinder 2/4 r x r x3.14 x 1x1x3.14x4 equals 12.56 ci fluid in the cylinder that's not perfectly right as there is the rod and the piston but the skyrydr2 cylinder is approx 10.36ci 1.625 x 5 i am not sure what he has for a hydro pump tho .
thanks for all the help guys
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cheers
Tyler

Edited by 8tyman8, July 04, 2012 - 09:57 PM.


#15 8tyman8 OFFLINE  

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Posted July 13, 2012 - 01:44 PM

YAHOO i got it going works quite well the steering will still work when you use the lift steers quite quick and does not seem to out-run the pump at idle works awesome at full throttle.
i made my own bracket for the valve and the steering column plumbed it AFTER lift valve for fear to blow a seal in $500 valve i have around 3 spare lift valves
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VIDEO

Cheers
Tyler

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Edited by 8tyman8, July 13, 2012 - 01:47 PM.





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