1985 JCB 1550 backhoe w/ perkins 4.236 turbo diesel. Recently having hard start and no start issues. First thing in the morning a few days ago motor would almost start and then just keep turning over. When i finally get it started no smoke or loss of power obvious. Even after it is warm some times will crank right up and sometimes it doesnt. This morning no start at all. No puffs of smoke while attempting to start. Fuel tank cleaned. Lift pump cleaned, filter 2.5 hours old (getting new one anyway). I have pulled all the lines off, pulled filter off. Blew air through every line waiting for two new seals for the lines into the injection pump. machine runs good when it runs but I cannot get it started. What the heck is going on??