John Deere mower deck won't engage after running

[dgrif]

I have a John Deere riding mower with hydrostatic transmission. The mower deck will not engage after mowing a while. It will stay engaged, but will not re-engage after being turned off. Have to shut it down and let it cool for a while, then it will engage. Will occur after shorter operating time if mowing on a hot day. Coolant light never comes on. Is there a temperature sensor from the transmission to the electric clutch that engages the mower deck?

 

[tyjoja]

does the belt need adjusted, and when it gets hot won't turn the blades?

 

[dgrif]

Belts are adjusted. Seems as tho the electric clutch or solenoid is not engaging when hot

 

[SONOFADOCKER]

PTO might be near its life end and getting to hot .

 

[reddragon]

could be a safety switch thats broken and reacting to heat [ expansion and contraction]