Finally Got my Live Hydraulics installed on the 8N

Thanks to TOH for putting up with my questions and piecing together a system that gives me live hydraulics. I learned a lot from TOH and reading everything I could get my hands on.
We also worked in some extra remote ports so I could supply a home made hydraulic top link with one valve and when I need, an old Dearborn loader with the other valve. TOH even supplied me with a detent kit for one of the valves so I can supply constant flow of hydraulic pressure to an old log splitter and continue to use the valve on the splitter.

I got lucky last year and picked up a 9GPM old Vickers vane pump for $75 off of ebay. Rebuilt it by changing all of the seals, bearing's and vane's and very slightly sanded all of the pump plate surfaces. I get 2200lbs of pressure if I momentarily dead head the pump.

Next I m going to add a hydraulic cylinder to my old ford back blade so I can change the angle from my seat.

Here are some picts. Of my rebuilt Vickers pump. An external 100 mesh hyd. fluid strainer. Return hose to the top of the shifter housing. Some picts of the valve assembly and proportioning valve. Ridged connection to the 8N's hydraulic test port (AKA Live hydraulics). Hose routing and home made hyd top link cylinder that gives me 18" of adjustment on my 3 pt attachments.

TOH designed the valve and proportioning diverter valve mounting plates along with the 2 hydraulic sump plugs that allow the connection of the suction lines, and also the return line adapter to the hydraulic fluid fill hole on the shifter plate housing.



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Good job!
Have been thinking of splicing off dearborn loader hydro. system for top link as well as power angle on rear blade and rake.
 
(quoted from post at 05:18:23 07/11/14) Good job!
Have been thinking of splicing off dearborn loader hydro. system for top link as well as power angle on rear blade and rake.

Thanks. Once I got the hydraulics working, I came up with all sorts of ideas to put the hydraulics to good use. I want to explore the use of a hydraulic motor on my brush hog to replace the PTO gear housing.
 
(quoted from post at 10:12:52 07/11/14)
(quoted from post at 05:18:23 07/11/14) Good job!
Have been thinking of splicing off dearborn loader hydro. system for top link as well as power angle on rear blade and rake.

Thanks. Once I got the hydraulics working, I came up with all sorts of ideas to put the hydraulics to good use. I want to explore the use of a hydraulic motor on my brush hog to replace the PTO gear housing.

Off the top of my head I.m guessing you don't have sufficient flow to effectively power a bushog with a hydraulic motor. I could be wrong and if you want I can do some "calculations".

TOH
 

TOH I was stuck at figuring out the torque needed to run the brush hog blade gear assy. I believe the RPM of the motor s/b ~ 1500-1700RPM.
I believe the smallest link in my setup is the valve which is rated at 8GPM
 
(quoted from post at 18:54:30 07/11/14) Is that a crack in the belly weeping oil in front of the port?

No actually did not tighten up the sump drain adapters that feed the suction side of the hyd pump. Never leaked a drop of fluid prior to that.
 
You will have more power off the PTO. Continuous
high speed/high pressure on something like a bush
hog will require a larger reservoir and most likely
a high capacity oil cooler. You also need a higher
capacity/PSI pump. Even to run a mower off a skid
steer you need the optional high flow/high pressure
hydraulics.
 
(quoted from post at 00:37:30 07/12/14)
TOH I was stuck at figuring out the torque needed to run the brush hog blade gear assy. I believe the RPM of the motor s/b ~ 1500-1700RPM.
I believe the smallest link in my setup is the valve which is rated at 8GPM

I would start the calculations with a requirement for ~20HP @ 540 RPM. I'm [b:b42bc75718][u:b42bc75718]guessing[/u:b42bc75718][/b:b42bc75718] that requires considerably more than 9 GPM at 2000 PSI. Plus you are probably introducing a 10-20% loss of "PTO horsepower" by replacing the much more efficient mechanical shaft drive with the hydraulic pump/motor combo. And as the other gentleman says a 100% duty cycle hydraulic motor is a heavy heat load so your 5 gallon reservoir is almost surely undersize for that sort of application. For a full time motor load you probably need 2:1 reservoir to flow rate and you currently have 1:2!!!

TOH
 
(quoted from post at 22:12:06 07/11/14) You will have more power off the PTO. Continuous
high speed/high pressure on something like a bush
hog will require a larger reservoir and most likely
a high capacity oil cooler. You also need a higher
capacity/PSI pump. Even to run a mower off a skid
steer you need the optional high flow/high pressure
hydraulics.

Thank You. Point well taken. I'm still a learn'n. They never taught this in computer class.
 
(quoted from post at 05:43:55 07/12/14)
(quoted from post at 00:37:30 07/12/14)
TOH I was stuck at figuring out the torque needed to run the brush hog blade gear assy. I believe the RPM of the motor s/b ~ 1500-1700RPM.
I believe the smallest link in my setup is the valve which is rated at 8GPM

I would start the calculations with a requirement for ~20HP @ 540 RPM. I'm [b:90b3aeec3f][u:90b3aeec3f]guessing[/u:90b3aeec3f][/b:90b3aeec3f] that requires considerably more than 9 GPM at 2000 PSI. Plus you are probably introducing a 10-20% loss of "PTO horsepower" by replacing the much more efficient mechanical shaft drive with the hydraulic pump/motor combo. And as the other gentleman says a 100% duty cycle hydraulic motor is a heavy heat load so your 5 gallon reservoir is almost surely undersize for that sort of application. For a full time motor load you probably need 2:1 reservoir to flow rate and you currently have 1:2!!!

TOH

Yes I see. Not worth the effort not to mention the $$$ needed. Just something I wanted to see if I could really get to work.
 
Looks like you have all an 8N can handle there Gabe! :)
I think that adjustable proportioning valve is the same one TOH
recommended to me when I plumbed my power steering off the
hydraulic pump that runs the loader on my Jubilee.
It has worked very well once I figured out how to get everything
balanced between loader speed and enough fluid to the steering.
 
(quoted from post at 01:15:20 08/10/16) Looks like a different valve and plumbed different.

I have used that valve a number of times and I believe it is the same valve just plumbed differently. In my picture the flow divider is upstream of the control valve.

In Greywolf's setup the divider is downstream of the valve. If you want to be technically correct in his configuration the valve should be plumbed with power beyond which it is not.

TOH
 
Ok good deal. You make up the fitting coming out of the factory hyd port that is going up to the flow divider on grey wolfs setup?
 
(quoted from post at 23:44:13 08/10/16)
39110.jpg
would this valve work?

That is in fact they valve I use - Price MB21BB5C1. It will handle up to 8 GPM of flow and as I said in the previous post if it is upstream of any other valve it really should be configured with the power beyond option.

All of the fittings are standard off the shelf items with the exception of the sump and transmission filler adapters. If you are planning a conversion keep in mind that your external pump has to use the internal sump in the tractor for it's oil supply and the flow to the test port should be limited to a scant 3 GPM.

TOH

TOH
 

greywolf,

Question; what is the purpose of the connection to the 8N's hydraulic test port? I don't understand why it is needed with the extra front pump.

I have been following this with great interest - thanks for posting.

Ken
 
(quoted from post at 09:30:36 08/11/16)
greywolf,

Question; what is the purpose of the connection to the 8N's hydraulic test port? I don't understand why it is needed with the extra front pump.

I have been following this with great interest - thanks for posting.

Ken

It gives you live hydraulics on the 3pt.

TOH
 
(quoted from post at 14:09:16 08/11/16)
(quoted from post at 09:30:36 08/11/16)
greywolf,

Question; what is the purpose of the connection to the 8N's hydraulic test port? I don't understand why it is needed with the extra front pump.

I have been following this with great interest - thanks for posting.

Ken

It gives you live hydraulics on the 3pt.

TOH

TOH,

So, you are puttting flow into the test port rather than taking it out. I had not thought of that.

Thanks,

Ken
 

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