Posted up a while back but needing some more info. Here's the issue. Tractor is a 1985 4050 with a 466 non asp motor. Starts great when cold. Can run the tractor all day just running around all day like moving bales. Problem arises when you really work it. After it gets good and hot after you shut it off it is very hard or impossible to start. Tractor will turn over but seems to have hydraulic pressure keeping the motor from turning free. Reason I say that is I can crank the steering wheel back and forth an free the motor up to where it will sometimes start. Have replaced the injector pump charge pump battery cables and relay. I have had a lot of hydraulic work done about a year and a half ago. Starting to think he didn't get something back in there right. Been having this problem for about 9 months. Just weeding things out before going back in. Thanks for any ideas you guys have