Cat excavator not running after fuel tank flush

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55HT4

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The fuel tank on my e120b was full of rust, it would run for maybe 20 min then choke out and die because the screen in the fuel pump got plugged. So I removed the fuel tank and flushed it and got lots of crud out then let it dry out, when I reinstalled the tank and bled the fuel system it pumped fuel fine via the priming pump and started fine, it then ran for about a minute and ran out of fuel (so I think). Any help would be greatly appreciated.
Thanks
Josh

P.S. Could replacing the hydraulic filter help? The date written on is is 05 so its a little overdue.

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Sat, Apr 18, 2020 5:41 AM

Old Magnet

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If you mean "Fuel Filter" that would be a good place to start.

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Sat, Apr 18, 2020 5:54 AM

55HT4

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Reply to Old Magnet:

If you mean "Fuel Filter" that would be a good place to start.

The fuel filter is fresh, there is also a small screen inside of the inlet banjo bolt on the fuel pump, thats what I was referring to.
Thanks
Josh

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Sat, Apr 18, 2020 5:56 AM

Old Magnet

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Reply to 55HT4:

The fuel filter is fresh, there is also a small screen inside of the inlet banjo bolt on the fuel pump, thats what I was referring to.
Thanks
Josh

Those banjo bolt screens can usually be inspected and cleaned with compressed air. Replace if damaged.

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Sat, Apr 18, 2020 6:06 AM

55HT4

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Reply to Old Magnet:

Those banjo bolt screens can usually be inspected and cleaned with compressed air. Replace if damaged.

I already cleaned that after reinstalling the fuel tank, the problem is it seems to not pump fuel when its running but it did perfectly fine prior to tank removal.
Thanks
Josh

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Sat, Apr 18, 2020 6:10 AM

Old Magnet

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Reply to 55HT4:

I already cleaned that after reinstalling the fuel tank, the problem is it seems to not pump fuel when its running but it did perfectly fine prior to tank removal.
Thanks
Josh

Are you getting flow of fuel to the pre-filter or banjo fitting?

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Sat, Apr 18, 2020 6:15 AM

55HT4

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Reply to Old Magnet:

Are you getting flow of fuel to the pre-filter or banjo fitting?

It's strange, I don't seem to when I turn over the engine but when I pump the priming pump fuel gushes out (testing at the filter housing).

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Sat, Apr 18, 2020 6:22 AM

Old Magnet

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Reply to 55HT4:

It's strange, I don't seem to when I turn over the engine but when I pump the priming pump fuel gushes out (testing at the filter housing).

I'm not that familiar with that unit but is sounds like you may have some trash in the fuel pump itself, maybe in an internal check valve.

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Sat, Apr 18, 2020 6:30 AM

55HT4

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Reply to Old Magnet:

I'm not that familiar with that unit but is sounds like you may have some trash in the fuel pump itself, maybe in an internal check valve.

Ok, I will take a look at it tomorrow Thanks for the input.

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Sat, Apr 18, 2020 6:37 AM

dpendzic

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Reply to 55HT4:

Ok, I will take a look at it tomorrow Thanks for the input.

Would this be a 3204 engine? My fuel pump has 3 little plastic check valves in it and they break or plug fairly easily

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Sat, Apr 18, 2020 6:56 AM

55HT4

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Reply to dpendzic:

Would this be a 3204 engine? My fuel pump has 3 little plastic check valves in it and they break or plug fairly easily

no its a 3114 i believe, but im not sure because the engine was swapped and I dont know if the proper engine was reinstalled, the ID plate on the valve cover doesn't have the model no.

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Sat, Apr 18, 2020 7:33 AM

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