Kx-33-4 Bogging under load

[Odeezy]

Hey, been having issues with a kubota bogging down under load. Seems to only be an issue when warmed up after using it for 30 minutes or heavy load while digging. Have to lessen load and then the engine stops bogging down. It is intermittent so it doesn’t seem like an injector pump issue. The lift pump works and the filter has been swapped and the separator was drained and cleaned out. I checked the return line back to the filter from the injector side and have diesel coming out. I’m thinking possible air getting in a line under the heavy load once the low pressure lines warm up.

I have some air in the water separator and it doesn’t ever seem to leave even when manually bleeding. It seems like this may be due to air getting in from what I have read but it runs fine on startup. I’ve attached a video, mainly looking to see if anyone else has encountered this issue or has any recommendations.
The excess diesel on the lines and filter ring are just spilled from before. Not seeing any active leaks.

Video Unavailable

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streamable.com

 

[North Idaho Wolfman]

Definitely looks like air being sucked in, could be a bad O-ring seal on the separator / filter, or any hose before it.

 

[kubotafreak]

Remove the separator, and use a small pick screwdriver in the inlet side elbow. Money, you will have a black clog in there. Whatever you do, I do not advise using compressed air on the lines. You can blow in the separator when its off the tractor, but blowing the lines moves the clog. More times than not this just delays the inevitable. Finding the restriction that has collected is a much better approach.

 

[lugbolt]

Remove the separator, and use a small pick screwdriver in the inlet side elbow. Money, you will have a black clog in there. Whatever you do, I do not advise using compressed air on the lines. You can blow in the separator when its off the tractor, but blowing the lines moves the clog. More times than not this just delays the inevitable. Finding the restriction that has collected is a much better approach.

that's exactly what I was thinking too.