I have a MX 5100, 2 wheel drive. I raised the bucket up and locked it up with the locking lever. It seemed hard to move the lever back to the normal position, with some effort I got the lever back to the normal position. The loader now moves slow up and down, but the operating lever moves side to side and the bucket operates correctly. Any suggestions? Tractor has about 250 hours and has been operating just fine until now.