Bucket tilt problem

[u276979]

My Westendorf WL-42 loader is malfunctioning. Upon start up the bucket will function as intended but after a brief warm-up, the bucket will move to the full dump position and movement of the joystick will only act to bump the bucket. All other hydraulic-driven functions work fine (raise/lower loader, transmission, pto, etc). I’ve also noticed that there is more play from side-to-side in my joystick than normal.
Any ideas as to what’s going on and how to correct it? Thanks!!