3 hrs on 2015 NX4510 and check engine light is on after missing Regeneration

[countrybumpkin]

So you have a check engine light & a regen light on or just the regen?

 

[ToSoon]

I had the regen light on flashing so i slowed down and stopped and dropped the RPMs while trying to find out what the light was. I hit the switch and it went off and the check engine light was on after that. I am guessing because I didnt keep it hot enough during the regen cycle.

 

[paulfun9]

1) thanks for editing out the last sentence of my post that clearly stated that there might be differences for Tier 4

2) there seem to be a few hundred thousand Tier 4 diesel trucks running around at less than equivalent full PTO rpm that seem to function reasonably well. I'm no diesel engineer but I gotta believe that a tier 4 engine has got to be able to run at less than PTO rpm without harm.

3) bogging a diesel isn't great but you can still mow at less than PTO rpm without bogging. People do it all the time.

I don't under stand why you seem upset that I edited out some of the post? I just wanted to point one of the "subtleties" for the benefit of others without wasting much space! Don't worry I left this one alone as not to offend!

 

[IslandTractor]

I don't under stand why you seem upset that I edited out some of the post? I just wanted to point one of the "subtleties" for the benefit of others without wasting much space! Don't worry I left this one alone as not to offend!

It just seemed like you had edited out the exact point you then went on to make. Not a big deal I just couldn't figure why you would edit out that point and then essentially reiterate it.

 

[Hill Billy Bob]

This is over stated. I have close to 500 trouble free hrs on my DK40 and rarely run the engine at PTO speed. I mow frequently at 2100 or so and the tractor does just fine. If I start to bog down I simply either increase engine speed or slow down mowing speed.

It is true that the diesel engine is most efficient at around PTO speed but if you don't need that much power then there is no reason to run it so fast. Of course a finish mower might be more fussy to get the best cut but for routine pasture mowing and light/medium bush hogging PTO engine speed is not strictly required.

Perhaps there are some subtleties regarding the Tier 4 emissions equipment but the basic engine does fine at lower than PTO speed.

I have to agree with you IslandTractor....running at pto rated speed is unnecessary most of the time. In fact I have never found to be. Like you, I mow at 2050 to 2100 rpm, and have had no problems powering my 73" flail mower with my CK30, nor have I had any problems with the tractor (now at 481 hrs). Furthermore, I ran a Kubota B-8200 (approx 16 pto hp) for 24 years, with a 5' bush hog, in the same fashion. When I sold it, it ran as good as new, never added oil between changes, and there wasn't a drop of oil leaking from any of the drivetrain (transmission, front or rear axles, pto, etc)

Prior to the tier 4 introduction, all of the CK & DK Kioti engines, produced their maximum torque at 1700 rpm. Only exception was the CK20, at 1900 rpm. In the case of my CK30, there is a 17.5% rise in torque, as engine speed drops from 2600 to 1700. So, in order to lug your engine, you'll have to drop somewhere below that speed.

I do have some experience with the regen process, but only in the larger truck engines. They would regen fine during highway operating conditions....not so in city traffic, local delivery, or extended idle operation. I might add, regen did not require engine to operate at the 2100 rpm governor speed....just going down the road at 1450 or 1500 did it. The important thing was not to interrupt the cycle, by letting exhaust temps to drop, as it would if allowed to idle, at say a rest area, or the like.

 

[ToSoon]

I talked to the dealer he was attempting to contact kioti but did not hear back. We talked for awhile walked through some of the trouble shooting but nothing that made me feel any better. Hopefully I will know more in the morning.

Bob I really hope that the issues is interrupted the burning process and it will be as simple as letting it warm up and doing it manually. But seriously this should not be happening after 15 minutes. I had ran it around 2.2k the hour and half before that. I had made one pass into the field and it lit up. Even the dealer agreed nothing I did should have turned the light on.

 

[ToSoon]

I guess if nothing else I can be a test case for how they support tier 4 issues....or a rookie who hit the wrong button.

This is from the manual slightly shorted. It said to do it at idle.. and I had it above idle when it was doing the regeneration so unless I shut it off on accident then it should have worked. Either way they say you can skip it in an emergency maybe the result is the check engine light comes on.


"If carbon is accumulated in the exhaust cataylic filter, the warning lamp comes on or blinks. If this lamp comes on push down the regeneration button. Then it refers to another page and tells me to park the tractor, start it at idle, depress brake and lock. Run engine 3 to 4 minutes. Then press the regeneration button. The regeneration underway lamp blinks after the regeneration warning lamp goes off. Wait for approx. 30 to 40 minutes until the regeneration process is completed. "the regeneration under way lamp will come on the when the DPF temperature reaches a certain temperature."

 

[coobie]

I guess if nothing else I can be a test case for how they support tier 4 issues....or a rookie who hit the wrong button.

This is from the manual slightly shorted. It said to do it at idle.. and I had it above idle when it was doing the regeneration so unless I shut it off on accident then it should have worked. Either way they say you can skip it in an emergency maybe the result is the check engine light comes on.


"If carbon is accumulated in the exhaust cataylic filter, the warning lamp comes on or blinks. If this lamp comes on push down the regeneration button. Then it refers to another page and tells me to park the tractor, start it at idle, depress brake and lock. Run engine 3 to 4 minutes. Then press the regeneration button. The regeneration underway lamp blinks after the regeneration warning lamp goes off. Wait for approx. 30 to 40 minutes until the regeneration process is completed. "the regeneration under way lamp will come on the when the DPF temperature reaches a certain temperature."

IMHO,I would contact Bob Piro (owner)at Michigan Iron and equipment (kioti dealer) located in Morrice MI. and pic his brain.Very sharp person to speak with

 

[ToSoon]

Supposed to be hearing from the Kioti tech support but I will give him a call after.

 

[MinnesotaEric]

Fire the tractor.

Warm it up.

Set the throttle at 1700 rpm or higher.

Hit the regeneration button.

It'll be fine.

The dealers all seem to know only what they have been told by the mother ship.

The mother ship didn't mention that tier 4 soots up during warm up and a bunch of people firing up a tractor and moving it around the lot with a cold engine filled up the exhaust filter with soot.

The check engine light is likely on because the stupid pressure differential sensor is reading higher than 0.95v reference voltage, out of spec, and so the tractor is in a limp home mode until somebody regenerates the exhaust filter by getting it hot enough for long enough to cook off the soot collected in it.

Burn the soot off and your next regeneration cycle will be spaced out much further because you will warm up your tractor and then keep using it.