joystick control valve leak repair 

Thanks Michael

Yes I would say it's possible something has potentially failed in the lower portion of the joystick. Assuming all other controls are functioning when you are in digging mode and everything is functional when you are in loader mode you have isolated it to the joystick itself. I suggest giving JCB a call I bet they can connect you with someone in the shop that might be able to trouble shoot for you. I'm not sure on the cost to replace the entire assembly.

If you can match up the size it's worth a try. I'm pretty sure my dealer did not itemize the assembly to that level of detail. If that doesn't work you can probably purchase a non-specific joystick and pilot control assembly would need to confirm thread size and type on your hydraulic hoses to hook up. A lot of these components are pretty standard across all makes and models for a specific year. Whats the machine your working on?

Tyler Bemis thanks for the reply. It's a kubota so I assume the parts must be around but I imported it and haven't seen this model here, although I would guess as you've said that a similar size kubota would have the same parts hopefully. I live out in the boonies and have no idea where my nearest kubota place is. I have skf within driving distance and they do all of the seals/o rings, nearing and belts anyone could ask for. I'll have a look online again and see if I can email with a kubota dealer

Robc509 If you decide to go through the Kubota dealership they probably won’t be able to match your part numbers since the machines imported but they should be able to work with the US market equivalent machine to get you what you need. I know people that have imported Doosan machines none of the numbers match but the parts are the same

im not sure on that. The control did have some markings on it but no company stamp

It sounds like the right plunger on the right joystick is getting stuck. Each plunger is spring loaded so if its binding and no longer springing back into position it could be causing inconsistent performance. What’s the make and year is the machine?

Thanks , i found the return spring on the spool is broke .

Its a 2004 mustang mtl 25

@@danfaller1089 nice! I’m glad you were able to get it repaired

I don't think it was until the last few years manufactures started pushing electric over hydraulic

@@TylerBemis 👍🇺🇸

você precisará encontrar um que corresponda à sua fabricação. Cada máquina usa peças de tamanhos diferentes.

@@TylerBemis como chama essa aí

if you search hydraulic joystick plunger caps you might be able to match up what you need. They come in different sizes depending on the manufacture of the joystick assembly.

Yeah specifically on that one everything you see can be unthreaded/ disassembled from the top down. In theory if you have enough room to work you can just leave it inside the machine connected to the feed lines. I chose to completely remove it to clean and inspect. If you are having trouble finding replacement parts the O-rings on the plungers is what is the failure point so if you can match them up you can just replace them instead of the whole plunger unit. In my case Doosan only specifies to the plunger unit not the O-ring.

I'm also about to do this on my TL130. This question is for @ProfessionalHomeowner since you have a similar machine. I'm just wondering what your symptoms were on your machine. Mine seems to have a very sensitive curl function and it wanders at higher RPMs. I'm hoping this can solve the issue. Any help/tips would be appreciated.

I'm just guessing but the sensitivity in the function may have to do with a hydraulic valve body that diverts the fluid to the specific function you are engaging. Could be something up with it. Are you noticing hydraulic fluid on/around the base of the control?

@@WalnutsandWineberries I didn’t have any issues with controlling the function however hydraulic fluid was leaking badly… which slowed down the reaction time of the controls but they did not wonder or become sensitive. Have you done a hydraulic fluid flush? Also, be careful when your removing any of the lines, valves and plungers they are specific to each function. The orientation of the joystick is specific as well. Good luck.

@@TylerBemis I haven't disassembled it yet. I didn't notice anything when I did the initial oil change when I got the machine a while back. This helps though. I'll do a proper inspection and try to trace those lines back and inspect that area too. Thanks for getting back to me.

Ty Turner I removed it to clean everything the best I could

you can grab them with a pair of pliers and pull them out its that simple.