Cat 312 won't spin

Hello, My 2000 model year 312 BL won't spin. I think it is either the solonoid on the turn motor or the sensor that tells the solonoid to release the brake. I did realize that it was heat related. It started doing this last week. I would be running it for a while and it would stop turning. I let it sit for a half hour or so and it is normal again. I run it for a while and again it stops turning. Today it stopped and after letting it sit a couple hours it still won't turn. Whatever was on...

Cat 312 won't spin

Cat 312 won't spin