Loadall hydraulic leak

[biggles]

Have on old 525/58 from the 90’s and it has a hydraulic leak. It’s coming from the first slice you can see. I changed the fitting and dowty as it looked as if that was the culprit. But it looks like it is coming from that circular bit in the middle between the 2 outlet pipes. Is that possible and or repairable as I’m loosing about 20l of oil a month! Cheers

 

[Mr Happy]

Good news. Yes it's repairable either in situ or take it of so it can be done a work bench. I'll post some info on Monday which will show you what's inside the valve block.

 

[stitch]

Looking at the parts diagram below, yes it is repairable.

https://parts.jcb.com/parts/index/p...MzFiLWZkMDUtNGZiMy04OTEzLTBkYzIzY2Q4ZmI3NiJ9/

Hope this is of some use to you.

 

[biggles]

Thanks guys, that’s made me feel a bit better, thought it looked an expensive lump!

 

[ACEngineering]

its an oring and a back up ring BUT jcb and now manitou only supply a standard 70 shore hard oring and they dont last five minutes, years ago manitou used to supply a hard oring as a spare part but since changed to a cheap standard oring, i tried some 90 shore hard orings but they are not easy to fit especially in the cold, i since have some 75 sore orings that seem to work okay from local seal and bearing shop.

I have even ordered that oring as a genuine parker part number and still get soft orings, yet i still have a few complete new popit valves with a harder oring so 100% back in the day they had a harder oring on them.

Somewhere along the line since parker bought out that valve block manufacture the spec of that oring has changed for the worse.

 

[biggles]

How do I get it out? Can’t see anything holding it in, it’s in a bad spot behind the wheel, cheers

 

[Tractortech]

Now Then..
One simply removes the tie bolt directly behind the leaking part (where the arrow points).
Then, pull the plug out with a screwdriver or some pliers..

 

[bobk]

All JCB's leak , it's normal

 

[Mr Happy]

There are three items that make up a Kontak spool valve check valve and on the check body there's an o ring and back up seal. As @ACEngineering previously posted that's the o ring that needs replacing.

 

[biggles]

It’s all become clear now! Cheers for the help lads, much appreciated

 

[ACEngineering]

How do I get it out? Can’t see anything holding it in, it’s in a bad spot behind the wheel, cheers

be sure to get rid of all pressure in all services before you undo the tie rod to remove the valve, you will want a flat screw driver, bent long nose pliers and a small magnet is handy to fish the spring and valve seat out. use thick grease to glue the valve seat and spring in to the top seat when refitting.

 

[Cocomac]

All JCB's leak , it's normal

They come with factory fitted leaks sometimes