Loader Loader stalls on L3710

[Budira]

I recently had my metal return line replaced and complete servicing at 1000 hours. Now the bucket stalls when I go to full throw on the up lever. Partial throw on the up works fine as all other movements of the bucket. I talked to a mechanic at the Kubota dealer and he told me the female coupler on the return line was malfunctioning and just replace it. After replacing all the quick disconnects, I revved up to about 2000 RPM and went full throw up on the bucket. I did it three times and each time I blew a different line. I replaced the lines a they blew. They were 10 years old, but looked OK.
Any suggestions where to look before I haul it back in for servicing?

 

[KennyV]

Check your joy stick linkage & your control valve.. KennyV
Also ... when you are checking for a hydraulic problem, leave the engine at idle speeds... when it works properly at idle, it will work at higher RPM without putting a lot of extra strain on things when things are not right...

 

[Budira]

Thanks Kenny, I thought about checking the linkage,but then decided I might be bypassing the real problem. I watched your video of flow rate and pressure correlation. I was able to build a pressure checker, but not flow rate. I will look at the linkage in case it has worn or worked loose.