Rear arms not working since fitting loader.

[Deutzdx3]

When you say "Dump" you mean the pipe coming from the "T" mark on the slice with the 90degree bend on it? Or the pipe on the bottom right hand side in your picture?

Will you look at the loader slice for markings?
Do not block any return or feed pipes ...........

The pipe on the bottom on the right. That has oil flowing when the tractor is on tick over. As does the pipe on the side with 90 degree neck. Would it be worth swapping these over at all?

 

[Deutzdx3]

The block is made by commercial hydraulics.

 

[Mursal]

Any markings on the block?

 

[Deutzdx3]

Any markings on the block?

Can’t see any markings. Is it worth swapping the dump pipe and 59 around as there is oil running through both of them when tractor is ticking over.

 

[Mursal]

You should only have oil running through one of them, until the relief valve in the loader block opens, as far as I know. The one going back to work the lift arms should have oil all the time, which one that is I'm not sure?
The one marked T (for Tank) should have no oil flow until the relief opens / you ask the loader to do work.
Can you see an adjustable relief valve on the block? Maybe on the top where the pictures cuts through?

 

[Deutzdx3]

Found some marks.

Pipe 60 is P
Pipe 64 is T
Pipe 59 can’t see a mark. Is that any help.

 

[Mursal]

Piping looks good then so ...........
Can you see anything in the valve to control or stop the oil flow to pipe 64 or T ?
Like an adjustable relief valve?
Can you join 59 and 64 leaving both of them feeding the back just to test?

 

[Deutzdx3]

Piping looks good then so ...........
Can you see anything in the valve to control or stop the oil flow to pipe 64 or T ?
Like an adjustable relief valve?
Can you join 59 and 64 leaving both of them feeding the back just to test?

would it be under one of these balking bolts the adjustment.

 

[Pheasant Surprise]

Unfortunately can’t easily find an instruction sheet for these older Kontak / Commercial Hydraulics / Parker monoblock valves.

However I’ve found an instruction sheet for the US made Prince LVR range of loader valves which are very similar.

Note the change in valve operation from open centre to closed centre load-sensing.

http://www.princehyd.com/Portals/0/valves/LvrInstS.pdf

 

[Mursal]

As far as I'm aware the Deutx DX3.9 are old fashioned open center hydraulics.
Click for spec
So if the above details on the spool valve are correct you need a blank fitting in the side outlet (where you have the 90 degree bend) for open center.

But I have no idea where the relief valve is.

 

[KennyO]

@carbonfibre farmer did you not have similar problems when you fitted the loader to your new holland?

 

[Deutzdx3]

As far as I'm aware the Deutx DX3.9 are old fashioned open center hydraulics.
Click for spec
So if the above details on the spool valve are correct you need a blank fitting in the side outlet (where you have the 90 degree bend) for open center.

But I have no idea where the relief valve is.

So if I blank the port where pipe 59 goes into, then put pipe 59 into port 64 that will allow every thing to work? Is that what is suggested?

 

[Deutzdx3]

As far as I'm aware the Deutx DX3.9 are old fashioned open center hydraulics.
Click for spec
So if the above details on the spool valve are correct you need a blank fitting in the side outlet (where you have the 90 degree bend) for open center.

But I have no idea where the relief valve is.

You’re a feckng genius! Plumbed 59 into 64 and job done. If it sends me skywards as the hydraulics explode I’ll come looking for you. thank you so much.

 

[Pheasant Surprise]

Found some marks.

Pipe 60 is P
Pipe 64 is T
Pipe 59 can’t see a mark. Is that any help.

Kind of explains why the port for pipe 59 has no mark I think it’s just intended as a port that you screw in different type blanking plugs for open or closed centre - hence my post above with link to the instructions for the Prince block.

The loader has been plumbed how quicke advised me.

You’re a feckng genius! Plumbed 59 into 64 and job done. If it sends me skywards as the hydraulics explode I’ll come looking for you. thank you so much.

Got a pic of how you got it plumbed in the end.

I’m glad you got it working, but I’m still none the wiser why in the plumbing diagram in post 9 Alö had a pipe running to that side fitting back to tank - especially for an open-centre tractor like yours

Can someone explain it?

 

[Netherfield]

Kind of explains why the port for pipe 59 has no mark I think it’s just intended as a port that you screw in different type blanking plugs for open or closed centre - hence my post above with link to the instructions for the Prince block.




Got a pic of how you got it plumbed in the end.

I’m glad you got it working, but I’m still none the wiser why in the plumbing diagram in post 9 Alö had a pipe running to that side fitting back to tank - especially for an open-centre tractor like yours

Can someone explain it?

Pass, just glad it's got @Deutzdx3 up and running again. Specially as he spent so much time getting the loader to fit the tractor in the first place.

 

[carbonfibre farmer]

@carbonfibre farmer did you not have similar problems when you fitted the loader to your new holland?

Yes a bloody nightmare....
Plumbing it right but found it was the wrong block (for a John Deere) so wouldn't work. Once I'd got the right block worked a treat plumbing it exactly as per the diagram supplied.

Sounds like the op is sorted now though

 

[Mur Huwcun]

Seems you’re sorted now but I feel you still need a dump line, your loader is not self levelling therefore it’s not the end of the world. One thing you need to check now is if the relief valve is set correctly as your loader is plumbed before tractor spool valves and it’s own PRV. Do you know what tye valve was fitted on before? On the Massey that supplied the brackets?

Ideally you need to stick a gauge in the tractor rear coupling for a reading first then stick it on one of the outlets for the loader on the boom and compare. Use the lift (first left) ideally. Then compare with the crowd (3rd from left). Crowd relief valve can be set lower to relieve bucket shocks. Your looking at 2500psi ish, no more than 2800 though or it will start damaging the pump and circuit.

 

[dannewhouse]

Kind of explains why the port for pipe 59 has no mark I think it’s just intended as a port that you screw in different type blanking plugs for open or closed centre - hence my post above with link to the instructions for the Prince block.




Got a pic of how you got it plumbed in the end.

I’m glad you got it working, but I’m still none the wiser why in the plumbing diagram in post 9 Alö had a pipe running to that side fitting back to tank - especially for an open-centre tractor like yours

Can someone explain it?

cant explain it other than this:

My MF 6265 open centre gear pump

3 pipes to laoder block, 1 is flow 1 is return (there are plumbed in where oil used to go to spools it now goes through loader block and then through spools, quite simple …)

the 3rd pipe is the return from the loader block from when a service is being used ie you crowd it is the return of the other oil or you free flow loader down this is the line that oil goes back through, obviously it cant have the restriction that going through tractor spools would cause)

 

[MickW]

Hi it might be the lift arm limiter, it's in the photo of the returns into the hyd top cover, the plastic arm might have been moved when plumbing up
Lower the lift arms, lift the plastic lever up and down a time or two it should sit across the tractor.
Long shot but possible.

 

[dannewhouse]

when op said he plumbed pipe 59 and 64 together did you mean you've temporarily bypassed loader block or are you sorted now and everything works as it should? including loader?