Mowing John Deere 3720 with 60" mower deck

[Forrest1357]

Just got in from mowing all night and 5 minutes from finishing the mower deck quit going up and down. First time in 310 hours that this has happened. Any thoughts?

 

[3900tc]

Check the hyd. plug on back of tractor to be sure it's in all the way.

 

[shortthrow50]

well for starters, list everything that you have checked so far so people can narrow it down. Or did you not check anything

 

[Forrest1357]

Thanks 3900. I relieved pressure on my top n tilt and it worked right away. I'm not sure why that fixed it but I'm good to go.