Air Filter Power under Load Question

[Hawkshaw1]

I have a new to me L5030. This summer we tried to bale hay with a small round baler. It could barely do it. We used a kubota 50 hp utility special that did it fine.

I think this dirty air filter could have been the problem. I known and HST will not pull like a geared tractor but it shouldn't be this different I wouldn't think. My 5030 just didn't seem powerful under a load.

It was so dirty no light at all would pass thru it.
Here's a short video. https://youtu.be/tEYheFnmZqs

Any thoughts appreciated.

Hawk

 

[Bmbbm]

No air= no HP

 

[JeffL]

A dirty air filter will restrict air and reduce power and your filter looks dirty. If the filter was restricting airflow you would have noticed unburned fuel or black smoke from the exhaust. No black smoke probably means the lack of power was a result of something else. Jeff

 

[D2Cat]

If you can shut off the air you can stop a diesel engine. That one cure for a run-a-way diesel.

 

[lugbolt]

L5030 is turbocharged.

Now then we need to address something that people don't think about.

The turbo is not intercooled. It has a built-in wastegate. The wastegate is sort of a pressure regulator. Turbo pressurizes the engine air intake which increases power and torque. When air is pressurized it heats up. Also when a compressor (turbo) is out of it's efficiency range, it heats the air even more.

With a plugged air filter, the turbo is struggling to pull enough air into it to be compressed. This lets the turbo spin faster than normal to maintain the same intake pressure, which heats the air more than normal, which reduces engine power. That's the basics of it, and there's more to it, but you get the idea.

Also at one time, Kubota had a bulletin addressing the turbo discharge hose. I don't recall if the L5030 was involved. Might be worth a call to the dealer. A leak at the discharge hose will also cause really low power, and can also cause turbo overspeeding condition which can lead to catastropic turbocharger failure. I've seen this happen on an M59 and it usually means that the entire compressor side of the turbo grenades, disappears into shrapnel leaving only a large oil leak and parts of the cast steel exhaust side and CHRA housing.

 

[russell.still.5]

I doubt the air filter is the problem. I bought a used tractor off of a chicken farm. Filter was solid with feathers and I never noticed a decrease in power. There is usually an indicator somewhere close by that lets you know the condition of the filter.


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