auxilary hydraulics

gray · Feb 17, 2004

Folks,

I am looking for a good suppier for a rear auxilary hydraulics for my L48. I don't know if I should go with a 2 or 3 spool valve set? Is there a good reason for 3? Is it worth the extra? How much should I expect to pay for this? Just need some good input. Thanks.

MadReferee · Feb 17, 2004

I used a Prince SV 3-spool valve with 2000psi relief and power beyond for my B2710. I believe it is a 16gpm max flow. That should be about the right size for your L48. I could not find anything that met the B2710 hydraulic specs that had a smaller foot print. This setup is compact enough to fit on the fender between the ROPS and the seat (after I relocated the blinker light).

I have one spool for the top link, one for the future tilt link, and one for anything else hydraulic like a snowblower chute rotator.

BBELL · Feb 17, 2004

Grey read this post: http://www.tractorbynet.com/forums/showflat.php?Cat=0&Board=owning&Number=336599&Forum=All_Forums&Words=8354&Match=Username&Searchpage=1&Limit=25&Old=allposts&Main=336599&Search=true#Post336599

gray · Feb 17, 2004

BBELL,

Thank you. I will call Kubota and see if I can get just the block you mention. I am not set up for machining and few around here are. One question. Could a tap and die work on the port or is there some reason for a weld on fitting? I may be able to fashion a tap and die system.

Will any good 3 spool work? It sure would be nice to have the hydraulics there to use. I may even look for a BH thumb? Rig up a foot peddle and power beyond fitting? Who knows? All it will do is add wieght to the tractor.

I will start looking for the parts.

MadReferee · Feb 17, 2004

You will need a 4-way 3-position open center valve, with 1, 2 or 3 spools (ususally spring loaded return to center), with a power beyond outlet. It is also recommended that the input port have a high pressure relief set at at least 2000psi. Any valve block with similar characteristics should work.

That part numbers I used for the Prince valve are:
SV115 inlet port with 2000 psi fixed relief
3 SVW1BA1 4-way double acting work ports with spring return to center (work ports blocked in neutral)
SVE22 power beyond outlet

My cost for this valve was around $215 delivered. Surplus Center has these for about $225 or so. My total cost with 3 hoses and all fittings and disconnects and the Kubota hydraulic block connector was around $450 +/-.

_RaT_ · Feb 17, 2004

With the L48, the ports are right there just waiting to get quick coupled into. NO bloc needed. I installed the one on my L48 myself and it was a snap. You will get a special aluminum cap that attaches to the oil fil plug that dumps the fluid back into the well. The one I bought was all Kubota. The two quick couplers on the right rear will get used. Could not be much easier. I had a 3 spool, TnT and the third valve ran my rippers on my box scrapper or my solenoids on the Harley. I doubt I have any pictures of my set up. I'll look. Rat...

gray · Feb 17, 2004

Rat,

Did you have a back hoe on your L48? If so, are those the backhoe ports you are speaking of or are there others I have not seen?

If you did have the backhoe and used those ports is there some kind of bypass coupling on these units?

I would like to here more if you would. Thanks.

gray · Feb 17, 2004

Madreferee,

I haved a Surplus Supply catalog and will look up the parts I may need.
This will be my first try at hydraulics? I am holding my breath.

It is great having all the TBN'ers out there chipping on with info and comments. Keep it coming. I will give feed back on any project that I do and how it worked----ah-------or didn't work.

NVNG?

_RaT_ · Feb 17, 2004

Yes it is the hoe ports. Since you cannot have the toplink on while using the hoe and needing the 3 spool valve while hoeing would be less likely, they are available to you. They all quick couple so ease of removal is fast. I did not have the hoe. My needs for hoe work is rather limited so I wanted the versatility of a 3 pt hitch with the abundant power of the L48's integral loader. Mine was so strong that on bucket curl I could lift the whole rear end off the ground when my tooth bar would lodge under a root. You do flip the lever on the right rear to the hoe position as I recall but leave the main quick coupler unused and its valve in the non hoe position. What in essence you are tapping into are the hoe swing hydraulics which also run the 3 pt hitch. I have a nice well made braket for the 3 spool valve body which is much nicer then mounting it to the fender. Heres a picture on my L3830 HST I took the other day after washing 50 lbs of dirt away.

gray · Feb 17, 2004

Rat,
That looks like a Detroit Squid on steroids? I had no idea those things where so big on the fender. Will it interfear with the cab I intend to put on the L48?

Let me get this right? If I am using the backhoe then I can not use the auxilliary hydraulics? When the hoe is off, I tap into the main hoe lines and that is the system?

I will have to llook close before going for anything.

I am also looking at how this unit will fit with my planned seat lift/rotation idea? I know, wanting too much. Have to science it out and get it all if possible.