Front end loader hydraluic problems

This is a Westendorf loader on a 3020 John Deere. This afternoon I started to lift a roll of cornstalks with it and it started up as usual then I heard a faint pop. The main frame of the loader will lift as usual but the spear will not tilt back[up]. There are no leaks and I have checked and double checked the connections for the hoses. I even put the spear on the ground and backed up while pulling the lever to get the spear up and it worked but the spear drops back down like a limp dishrag when I lift the main frame of the loader. The controller is a joystick type and I sort of suspect that may be the culprit. For the last couple of years when the temperature drops below 20f that part of the joystick freezes up and wont work until I work the side that works the loader up and down to warm it up or heat it with a heat gun. Both of the hoses [up and down ] jump when I work the stick . I have not pulled hoses to check flow yet and probably wont get time for a couple of days.Thanks for any help/advice Lee
 

Most likely you blew the packing in one of the tilt cylinders and now fluid is bypassing.
This happened to my Skid steer back in the summer, I scooped up a load and dumped it, when I rolled the bucket back up it rolled right back down, pulled both cylinders and rebuilt them, that fixed it.
 
Check down on the Oliver forum Lee. Might be on page 2 by now,has something about 1650 and loader in the title. Shows pictures of what happens inside of those cylinders when they blow. The poster had been having trouble for a while,thought it was in the tractor,finally found out it was in the cylinders. I had the same issue 10 years or so ago with the lift cylinders on my 1600.

I have had the end break off the rod too on the bucket cylinder,but when that happens,you can pull the rod right out the end.
 
The piston could have loosened or came off the rod inside the cylinder. You will have to pull the pin on the speer and see what the cylinder rod acts like.
Loren
 

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