External Hydraulic Tapping

[whirly]

I'm still new to my power major and am looking to use the tractor's hydraulics to power a post driver.

In the owner's manual, it states that there is "an external high pressure oil feed (1/2" B.S.P.) provided on the left-hand side of the valve chest for actuating external accessories." Can anyone show me a picture of this? I've looked through the parts manual to try to find a "Valve Chest" but I'm probably blind because don't seem to find it.

In inspecting I found what the parts manual describes as "Body (H.P.L. valve gear) and valve assy" and "Plug (H.P.L valve gear oil passage)- 1/2" B.S.P". i Is this the port I can use for Hydraulic pressure?



If so where do I run the return hose?

Thanks for any help I can get

[JC]

That is the jack tapping port, Whirly. It can be used for external hydraulic pressure, but only when the lift arms are all the way up or blocked in one position. If you need to use the lift for your post driver, it wouldn't work very well. If not, you can drill and tap your filler cap for the return line.
Sorry, I don't know much about post drivers, we still drive our posts by hand here.

[whirly]

Thanks for the info JC

Look like I'll have to get a PTO pump to operate the post beater.

[whirly]

Just out of curiosity has anyone tried adapting a hydraulic pump to the belt drive?

[5000blues]

Hi whirly,

there is an extra valve and lever that bolts on to the front of the lift control lever. They show up on ebay.co.uk from time to time, but they are never cheap, usually going for something like 200 pound sterling! It would solve your problem, giving seperate control of the lift arms from the post driver weight. Do you use a hydraulic toplink though?

5000blues

[whirly]

5000blues - Thanks for chiming in here

No I don't use a hydraulic toplink. However, with an Aux Hydraulic Service in the back it would be a nice addition.

In any event, I think the problem is solved. I've been looking into putting a Flow Control Valve in front of my FEL Spool Valves.

http://pdf.directindustry.com/pdf/princ ... 15835.html

http://www.princehyd.com/Portals/0/prod ... 0InstS.pdf

With that I can redirect part or all of the FEL pump service to a rear Aux Service. It's like a directional control valve with benefits. It has an internal 1500psi relief valve so if the valve is opened when there is nothing attached to the Aux Service ports it will just dump back to the Excess Flow (FEL spool valve).

[5000blues]

Hi whirly

One of these for sale now on ebay

http://www.ebay.co.uk/itm/fordson-major ... 45febc58c8

[whirly]

5000blues - Thanks for the heads up

Unfortunately it is a pick-up only item and I'm half way around the world

I did capture a picture of it so if I run across one I'll know what it is. Any idea what the part # is?



Winning bid: £303.99

[henk]

That's just what I need for the backloader.
They are expensief.

[frode]

That's just what I need for the backloader.
They are expensief.

henk, I have the hydraulic valve you need. Control handle is broken, but can be replaced with a standard major item if you have one lying around.

[henk]

Frode,

I have send you a pm.

[1962 model]

I'm still new to my power major and am looking to use the tractor's hydraulics to power a post driver.

In the owner's manual, it states that there is "an external high pressure oil feed (1/2" B.S.P.) provided on the left-hand side of the valve chest for actuating external accessories." Can anyone show me a picture of this? I've looked through the parts manual to try to find a "Valve Chest" but I'm probably blind because don't seem to find it.

In inspecting I found what the parts manual describes as "Body (H.P.L. valve gear) and valve assy" and "Plug (H.P.L valve gear oil passage)- 1/2" B.S.P". i Is this the port I can use for Hydraulic pressure?



If so where do I run the return hose?

Thanks for any help I can get

There are a few ways to get a hydraulic feed supply.

The picture you have is of a Fordson with the normal set up however if you require more hydraulic supply speed a Super major pump pumps more oil.
Another way of increasing both pressure and volume is to fit a PTO driven hydraulic pump but you will need a seperate oil tank.
Now back to the normal Fordson set up, there are two points where you can get a hydraulic supply from, the first is like you have shown in your picture with a return line adapted to the oil filler behind the seat, this give a single acting supply of course.
The second point is from the right side under the seat, this should give you a supply that you can run through a modern double acting spool valve, with the return as described at the back of the seat, you will likely need a shut off valve in the supply line to be able to operate the hydraulic lift arms, both systems won't work at the same time.

There are also accessory hydraulic blocks which mount at the front of the seat which have their own lever and have double acting hydraulic delivers and return, the hydraulic lift will work as normal, but these may be difficult to find.

Mike

[whirly]

Thanks Mike. That is very instructive.

Happy Holidays!

[nashby]

Would this second supply under the seat mean i could use a forlift via a control chest without the lift arms raising?

[Brian]

The part Mike is talking about is already fitted to your tractor, you were asking about it a couple of posts above.

If you are going to use another spool block, you will only need one pipe for the power and the return should be via the filler cap. Do not return through the spool block as this will slow the return flow down too much,

[nashby]

Ok i tried using the connection under the seat to the right with my forklift, as i turn on hydraulics via the lift arm lever the forklift stays where it is, then when i pull on the lift lever on the control chest of the forklift the forks start to lift and the link arms lift also. The only difference between the coupling under the seat to the trailer coupling at the front of the top cover ( between legs ) is that when i let go of the lift lever on the forklift the link arms stay up. If i were to go back to using the proper trailer lift connection (between legs ) and make some kind if linkage to lock the link arms down such as an a frame would this work? thanks for any help Nick

[Brian]

To use the standard port for external use, eg. a fork lift, you do indeed need a frame to hold the lift arms in the lowered position. The main control lever then needs to be locked in "Raise" giving you a constant supply to the fork lift control and back to return via the filler cap. You can then use the fork lift controls and not affect the lift arms.

The extra valve chest fitted to the front of the existing one allows you to use a fork lift without a frame as the normal lever controls the arms and the extra lever controls the flow to the fork lift valve bank. The lift arms can be used independently of the fork lift, although the arms will take precedence.

If you are using a spool block to control implements from a Major or Power Majors external service port it would be advantageous to have a relief valve in the block that is set at a slightly lower pressure than the tractors. This means that if the valve blows, it resets itself rather than you having to lower the main control lever every time it happens, to reset the tractor valve.

[henk]

Would the next setup work also?
Connect a spool block (forklift spool block) to the connection on the right side of the rear-end cover. Don't know if all majors has this connection that has a direct feed from the pump. Connect the return from the spool block to the filler cap. Then you have a separated hydraulic system apart from the lift arms. The spool block needs to have a relief valve itself.
Planning to make this setup with a three double acting spool block.

[Dandy Dave]

Yes, with any hydraulic system, all you need is a constant power flow in, a bank of valves with a relief,(dual or single) and a flow out. I've been following and do see several problems with the early Fordson Major. Brian has stated that the GPM on the Fordson Major is only 3 GPM. Most modern systems are around 8 GPM so the hydraulics will be slow. The second thing is the relief valve in the Fordson system, (which I think has been quoted as 1,200 PSI) may pop off before before the relief valve in the set of off the shelf puchased valves rated at 1,500 PSI. Thus, You will never beable to acheive the full working load and will need to reset the internal valve when it pops off at full load. Any comments, additions, or corrections in my attempt to make a complicated problem simple? Dandy Dave!

[henk]

Thanks Dave.

Why will the relief of the tractors system blow out before the spool block one, as it will not be connected to the auxilary output on the left front at the hydraulic unit, but on the right side under the seat as seen on this picture.

[Brian]

Because the pressure will build up throughout the system, Henk. The unload valve will dump just as if you are using the main control lever. If it did not work like that you could build enough pressure to burst the pump.

Unload valve pressure is 2000 to 2200 psi.

[henk]

Tanks,

things are clear to me now. I just found some drawings about the oil flow in four different positions. Makes things even more clear to me.

Planning to use this spool block with 3 double acting spools in the future as a portable unit, with 6 fast couplings.

[Dandy Dave]

Because the pressure will build up throughout the system, Henk. The unload valve will dump just as if you are using the main control lever. If it did not work like that you could build enough pressure to burst the pump.

Unload valve pressure is 2000 to 2200 psi.

So your added valves at 1500 PSI should Blow off before the Major internal valve does. Thats better than the other way around and you will get full use from the pressures of your bank of valves, and also, they will reset themselves when you try to lift something too heavy. Just your flow rate will be slow and all you need with that is a little patients. Dandy Dave!

[nzMark]

hi all, if anyone wants a extra spool valve same as one sold above on ebay let me know, i have a couple of spares. Mark