JD 4310 issue with loader hydraulics

[Buckeye JD]

I have Hydro JD 4310 with a 430 loader and I am having issues with the hydraulics. I took the loader off because I was using the mid mount mower. The hydraulics to raise and lower the mower deck worked fine and still do, as does the 3-point hydraulics. When I went to hook the loader back up, the hydraulics weren't working. I would get very little movedment.
I disconnected all the lines and reconnected. When I tried it, everything worked but I had a line reversed and when I pushed forward on the control lever, the loader raised instead of lowered. And when I pull back, the loader lowere. The dump and curl are fine. If I try reversing the lines so my raise and lower are correct, l lose all the hydraulics for the loader again.
I checked my fluids and actually just changed all the fluids and filters about a month ago, with only 5-6 hours on the machines since changing the fluids.
All ofhte hydraulics are working, even under load. The only issue I am having is with the loader.
Any ideas on what to look for?

 

[TractorGuy]

Not had this problem so not sure but here is the loader hose connections.

 

[Kyle_in_Tex]

I have recently bought brand new color coded endcap protectors. I need to install them. They help me keep the correct hose where it belongs.

Hope the above info helps you figure out what's going wrong.

 

[Buckeye JD]

Thanks. The above diagram is very helpful. Two of my hoses still have the color code caps but I need to get new color coded caps for the other hoses.
I think I still have a problem though, because when I switch the hoses, I lose all of my loader hydraulic functions for the loader.

 

[Kyle_in_Tex]

Thanks. The above diagram is very helpful. Two of my hoses still have the color code caps but I need to get new color coded caps for the other hoses.
I think I still have a problem though, because when I switch the hoses, I lose all of my loader hydraulic functions for the loader.

maybe a joystick problem?

 

[Buckeye JD]

maybe a joystick problem?

That is what I originally thought until I hooked the mower deck back up and didn't have any issues with tha. I even tried connecting the hoses for the deck lift to the hydraulic lines for the lift cylinders and it functioned properly.
Now that I just typed that, it has me thinking maybe it is a hose on the loader causing the problem but I still don't understand why I lose all the functions when I switch the lines.

If I were the only one using the tractor, I would just adapt to the joystick having to be pushed to raise the loader. But my father-in-law uses it sometimes and I don't want him having a mishap.

 

[beenthere]

Just covering possible problem.. be sure the quick-connects are seated well in the coupling. Sometimes they look seated, but are not quite.. and little to no oil passes through.

A good tool to have to check the lines out is a pressure gauge that you can plug (connect) into one line at a time and check the pressure. That will identify any joy stick (valve) problem that may have popped up.

Looks like this...

 

[Zebrafive]

It sounds like a bad coupler on either the hoses or tractor.