Oil changing intervals question?

[BobcatTR]

The egr reduces the burn temps in order to prevent the production of nitrous oxides (pollutant that causes ground level ozone) but also causes more soot. As a result it痴 then necessary to have a particulate filter (DPF) to collect the soot, which is also a pollutant. Then as the dpf plugs up, it痴 necessary to perform a regen, usually by far exhausting fuel into it or spraying directly into the dpf through a separate line. This burns the dpf clean restore exhaust flow.

So to answer your question, the egr causes the exhaust to become dirty.

The end result is, the life of the Diesel engine is significantly compromised and the pollution is released all at once instead of gradually during operation. Seems logical.

So is this why I'm supposed to loosen the nut under muffler???
And see if it drops the soot?
Or am I way off base here.
I work for a municipality, when our newer dump trucks get this warning lite, we have to take it out on the interstate and blow it out wide open.
Which we are governed to 65mph.
I know it better to run tractor up on higher RPM'S, this must be why.
Our city trucks do a lot of ildeing and 10 or less mph patching potholes etc.

 

[marchanna]

Regarding the dump trucks, usually the regen requires the engine to run at a steady state for about half an hour at a higher rpm. That痴 tough for dump trucks because they are usually local runs. A lot of idling will generally create more soot and foul the dpf and the oil sooner. Using a hefty dose of 2-ethylhexyl nitrate (2-EHN) will improve this condition considerably because it causes the fuel to burn faster in the cylinder.

 

[buickanddeere]

I don't quite see your point buickanddeere but I've never seen elephants on my property and I'm somewhat partial to the maintenance schedule recommended in my Kubota operators manual.

The operator has never had wild elephants trample his crops. It could be because the oil has always been changed at 100 hours for the past 35 years. There is something keeping them away, the oil changes are as good of proof as any.

 

[SSdoxie]

Your bobcat tractor does not have EGR. The muffler is a spark arrestor type to stop, collect any burning embers from leaving the exhaust that might otherwise cause fire to dry grass, etc. Removing the plug on the muffler and running the engine is to blow the cooled carbon deposits to avoid plugging the muffler.

 

[BobcatTR]

Your bobcat tractor does not have EGR. The muffler is a spark arrestor type to stop, collect any burning embers from leaving the exhaust that might otherwise cause fire to dry grass, etc. Removing the plug on the muffler and running the engine is to blow the cooled carbon deposits to avoid plugging the muffler.

Very Nice to know!
Makes a lot of sense!
So I do need to blow it out, thank you!
Terry

 

[sixdogs]

I have pre final emission equipment and with conventional oil used to change annually. I don't put a lot of hours on and some years might be only 30, 40 or 50. After I switched to full synthetic oil I now change every other year and in a couple cases every third year. Equipment is in controlled storage and never sits outside. I figure I'm good with that and it saves me a bunch of time.