I put on all new hoses from tank, new filters and it won’t suck fuel out of tank. I had it started but if it sits for a day, fuel drains all back to tank. Usually it took about three minutes of cranking and it would start after sitting for a day, but now nothing? Maybe it needs injection pump overhauled or check valve put in, it only has 4,800 hours on tractor. It worked good a week ago, but now it won’t prime itself?? Going to use electric pump to prime it tomorrow and then when I shut down tractor I put in ball valve in fuel line by pump to shut off so it don’t lose prime again. Anybody else have this problem?