I just bought a used mx5000 277 hrs I don't have the manual yet but I wanted to post this ques when i start the tract sometimes it wont crank at all, batt is good, when it does turn over it starts instantly it will run for hrs I may turn it off and come back 20 min later and no start it's like a safety sw or something opening the start circuit, does the clutch need to be engaged i couldn't find a switch on it also does the tract have to be in neutral. This is my first Diesel eng i am coming off a ford jubilee and ferguson to-30. this is what I do turn the key left for about 10 sec then try to start am I doing something wrong what else can i look for.