JD 4010 loses power then dies, prime with fuel and runs,

mdeisenhauer · May 21, 2023

I have an old 4010. It was running good with no real issues for a while now, then about 3 hours into some work it started to lose power and died on me. At that time I didn't have an opportunity to address the issue. I came back to it a few days later and noticed the fuel filters were not full. So I manually pumped the lift pump to fill the bottom, then the top filter, then cracked the supply to the injection pump and primed until all bubbles were removed. After a small bit of cranking it fires right up and ran for 20 mins before doing exactly the same thing from the first instance. It started to lose power and then died. I repeated the steps above and got it to run again, and again it started to lose power and died. I did this a few more times and always the same result. Yesterday I removed the fuel supply to the lift pump (plenty of unrestricted flow), removed the filters and blew through the ports, checked the return to tank line and that was clear. I'm at a loss at what it could be. Anyone have any recommendations I should investigate?

tim s · May 21, 2023

The return fitting is clogging up from material off of the flex coupling in the pump,, you can remove the check valve in the return fitting and get by for a while, but you need to schedule a pump rebuild soon.

used red MN · May 21, 2023

You must have the updated square glass filters to see
air in them. I been away from those tractors to long I
cannot remember if they always ran with no air in them
at all. If you keep getting air in them something is
wrong with your fuel supply lines or the supply pump,
something is letting the air in. You can pull the return
fitting out to check for it being clogged. Another
option is to keep a screw driver with you to loosen the
timing window on the pump fastened by 2 screws.
Whenever it starts to loose power and the engine RPM
drops loosen that plate so you have a trickle of.a
stream. If just relieving a little pressure in the pump
housing makes it come back to speed then you have
the problem Tim described.

fdt860 · May 21, 2023

First, install new fuel filters.

Blackhole49 · May 22, 2023

If not filters, make sure the screen on the end of your suction inside the tank (if it has one) is
clear. Try blowing air back through it.

JD 4010 loses power then dies, prime with fuel and runs,

mdeisenhauer

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tim s

Well-known Member

used red MN

Well-known Member

fdt860

Well-known Member

Blackhole49

Well-known Member

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