Take the little door off just below the key, remove the pin from the clevis, Take the spark plug wire off, start rotating the engine with the key, put the variator handle in the third notch from the front with the engine rotating. Back to the clevis: push up on the clevis and adjust the clevis so the pin slides back in without being forced. Get the grease gun: look in the hole and find the fitting, put the door and sparkplug wire back on.
If this tractor sets outside you might want to check the variator pulley to see if the center sheave is stuck.
If this tractor sets outside you might want to check the variator pulley to see if the center sheave is stuck.