DPF

[prenshaw2]

Hello all,
I traded in my 2010 Kioti DK45SE Cab for a Kioti Rx7320PC. My old one did not have any type of emissions, DEF, etc. This new one has a Diesel Particulate Filter, is it normal for it to sometimes blow out white smoke/exhaust, especially under higher RPMs? It does not always do it, but when it does, it's very visible and has a distinct odor.

 

[rademamj1]

Yes, white smoke during regen can be normal, and then sometimes it maybe absent during a regen. The sulphur odor during regen is always normal for me. It's the only way I can tell my tractor is doing an automatic regen. Typically it does an automatic regen about every 32 hours, and only when I am running the tractor at a high RPM required to do the job. High RPM jobs for me are rotary cutting, wood chipping and stump grinding. Loader and box blade work are mainly low rpm work and never start an automatic regen. I have done two manual regens during my 330 hours on the tractor, all the rest have been automatic.

Remember during a regen, high rpm is your best friend, because it creates the hot exhaust required to burn the carbon particulates in the DPF.

 

[JimR]

Yes, white smoke during regen can be normal, and then sometimes it maybe absent during a regen. The sulphur odor during regen is always normal for me. It's the only way I can tell my tractor is doing an automatic regen. Typically it does an automatic regen about every 32 hours, and only when I am running the tractor at a high RPM required to do the job. High RPM jobs for me are rotary cutting, wood chipping and stump grinding. Loader and box blade work are mainly low rpm work and never start an automatic regen. I have done two manual regens during my 330 hours on the tractor, all the rest have been automatic.

Remember during a regen, high rpm is your best friend, because it creates the hot exhaust required to burn the carbon particulates in the DPF.

Interesting about the white smoke as I have never seen my NX4510 do that. I smelled a sweet smell but never saw smoke of any kind.

 

[prenshaw2]

Mine looked like I was spraying for mosquitoes one time it did it.

 

[JimR]

Mine looked like I was spraying for mosquitoes one time it did it.

Wow, I absolutely never saw mine do that.

 

[prenshaw2]

Wow, I absolutely never saw mine do that.

When I was grading out my riding ring, RPMs up, it did it for about two minutes and then stopped. Usually takes me about 30 minutes to complete the job, so I guess it used that time to do it. It was at night and the white exhaust was really visible in the lights.

 

[Ortimber]

We have 4 machines with DPF's, and none of them have puffed any smoke at anytime. The smell gives away the fact they are in regen though.

 

[MapleLeafFarmer]

We have 4 machines with DPF's, and none of them have puffed any smoke at anytime. The smell gives away the fact they are in regen though.

X2... same on my end. No smoke ever, sound and smell does change though on our Kubotas

 

[ptsg]

Depending on how plugged the DPF is, it can smoke during regen, usually white smoke. Actually it can even throw small carbon particles still very hot to the point of causing fire ignitions with the right conditions. The manual should have a warning for that, at least on cars it does.

Just don't put your hand in front of the exhaust, even 6" away.... Don't ask me how I know

 

[rademamj1]

Another possible cause of brief white smoke, is the tractor diesel is just warming up and having a very rich fuel mixture, and that would also explain the strong odor. The white smoke should go away after 15mins, due to a hot running engine.