We have a 8440 with 6500 hrs on it. We are suspecting a faulty injection pump. The tractor is hard to start it will crank but does not want to fire when you do get it started if you shut it off it restarts hard again sometimes you crank it for 30-40 seconds. Has anyone pulled the injection pump on these tractors this one has the denso pump. Hate to take it to the dealer if I dont have to thanks for looking
john deere 8440 injection pump
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