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Case 485

T

Thomas Webb

New User
Hello

I recently bought a 1986 Case 485 and it has been sluggish to start and run, especially under load. I can run it for a very short period of time in low range with a brush hog but it eventually starves itself out of fuel and shuts off. It will not handle high range at all. I replaced the fuel filters and blew some air back through the line into the tank, drained all the diesel and replaced it with new fuel. It was suggested to me that there may be air in the line? Does anyone have any suggestions on how to bleed the air out or what steps I should take next? full disclosure I'm a newbie at equipment repair, any and all suggestions are appreciated.

Thanks

Thomas
 
I don't really know much about case as I'm more of a john deere two cylinder kinda guy. but in my experience with diesels to bleed air out you are supposed to crack open the fuel line on top of the injectors, one at a time, and turn the engine over till fuel comes out and then you tighten it back up.The tractor may start during the proses or at least try to, which is fine. You repeat this on all the injectors, usually going over them all a few times, until it starts and runs nicely.

Usually I just keep cranking the engine till all the lines are bled that way there is no chance for air to get pulled back into the lines. You may need to have a battery charger on the battery as to not run it down.

There could also be a chance there is an issue with injectors or the injection pump (fuel pump) that could be causing issues. Hopefully this helps you out a bit and good luck.
 

Remove the fuel line into the pump and catch the fuel. Let it run for 30 seconds to see if the flow stays strong. If it slows to a dribble you have an obstruction, so open at other places to narrow it down.
 
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