Case 9030 B

red bull

New User
My Case 9030 B will start up real quick and run for about 20 minutes and then die just like I cut the switch off and will not start back up. I can wait a few minutes and it will start back up and run fine but will then only run a couple minutes befor cutting off. If anybody has any ideas I would really appreciate anything you can tell me.
 
I thought so too but I replaced both fuel filters and put on a new fuel lift pump. This didn't change anything.
 
First thought it sounds like a clogged fuel filter/filters, but you said you've change them already. Second thought is something in the tank finding it's way down to the fuel suction tube and blocking/clogging it up wht in operation. What happens is vacuum from the fuel pump will keep the item sucked against the line when in operation but when the machine stops and vacuum goes away it eventually floats off until the next time. Next thought is a small crack in the fuel line somewhere letting the system suck in a bit of air as the machine is running. Once it shuts down the fuel flowing trough the system before it starts again displaces the air and it runs fine again until it sucks in enough air to cause a problem.

Over the years I have seen all three things happen, and, unfortunately except for changing the filters figuring out what's really wrong can be a royal PITA. Even then you still might not know what exactly was wrong unless you physically find the item blocking the intake or a visible crack/hole in the line... In fact there is one Hitachi excavator out there I was called on where the problem finally got resolved after about 4 different trips out and every check I could think of to make turning up absolutely nothing wrong, by replacing what appeared to be a perfectly good factory fuel line. I disected the old line from one ond to the other and between me and the customer, we have yet to find a crack hole, or anything else visible....but the machine is running like it should be now.
 
does your machine have a electric kill? if solenoid or key switch is heating up and breaking down it could cause those symptoms.
 
Hadn't thought of that one even though I ran into one about two weeks ago that had a similar problem. In that case there was a broken ring terminal where the safety shutdown circuit wiring connected to the oil pressure switch. Terminal was broke and had almost worked it's way out from under the screw to a point that there was just the tip of one end still making connection. It was passing just enough power to keep the solenoid open enough for the engine to run at an idle but bog under a load. Put a new terminal on and tightened it down and the engine went back to running normally.
 
right after i got my 350B i was dozing a fenceline on ranch and dozer just quit...checked everything fuel related and finally realized battery cable had jumped off batt post...had me scratchin my head fer awhile.
 
The electric selenoid was the problem. I changed it and its run 3 days now without a problem. Thanks for everybodys help.
 

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