Update on RX6010 with low hours motor failure

[coobie]

Funny....you have to lighten up...get a hobby...something....I'm going to haul firewood! :dance1:

Is that like ha,ha funny?Got plenty of hobbies want me to list them? How about you?Hey how about them green bay packers?Been a fan for quite sometime(one of my many hobbies)went to a game in green bay sept 30th against the bills.Oh forgot one,deer hunting is a hobby pic of couple in our side yard..

 

[ch1ch2]

I have seen several post referring to the minimal number of post by some.
While I agree with the thought process and the general correctness of this idea, let me play the devils advocate.

I have been here a while and I do not have all that many posts. That is because generally there are many well educated and highly experienced people here whom have have given an answer equal to or better to what mine would be, or I do not feel my answer would help.

There are a lot of people here that have less knowledge or experience than others.
If that is the case, then when they voice a complaint, they should not be vilified for not having "enough" posts.
They might be wanting to get involved and make a post, but just do not have words that they feel would be worthy of posting.

Again I am just playing the devils advocate. This is not meant to be in response to any one specific, just saying.

 

[finn1]

If the failure was a dropped valve caused by keeper shear, there are only a couple of scenarios that can cause this.

Keeper shearing occurs when valve seating velocity exceeds design criteria. The cause of the higher than designed seating velocity is lash in the system such that the Valve acceleration (deceleration) results in loads that exceed the strength of the keeper. The lash in the system allows the valve to slam onto the seat from the high velocity portion of the cam flank rather than on the low velocity ramp.

Ok, how does one get excessive lash? If the engine has hydraulic valve lifters, most likely it was run low on oil, allowing the hydraulic lifters to collapse.

Other scenarios are overspeed, which is unlikely in a governed Diesel tractor engine, but very common in diesel trucks on long downhill stretches where the engine overspeeds while descending in a low gear.

A third scenario would be excessive wear in the valve train, eg worn adjusters in a flat tapper valve train. This would be obvious to the analyst, though.

I spent something like 35 years as a development engineer working on Diesel engines and worked on keeper shear warranty issues.

Sheared keepers are an operator/ maintenance issue. All engines are subject to these failures.

It hurts for the op to hear this, but no Oem will cover an out of warranty claim when something so obvious to a trained and experienced warranty analyst as a case of sheared keepers is evident.

 

[DK35vince]

If the failure was a dropped valve caused by keeper shear, there are only a couple of scenarios that can cause this.

Keeper shearing occurs when valve seating velocity exceeds design criteria. The cause of the higher than designed seating velocity is lash in the system such that the Valve acceleration (deceleration) results in loads that exceed the strength of the keeper. The lash in the system allows the valve to slam onto the seat from the high velocity portion of the cam flank rather than on the low velocity ramp.

Ok, how does one get excessive lash? If the engine has hydraulic valve lifters, most likely it was run low on oil, allowing the hydraulic lifters to collapse.

Other scenarios are overspeed, which is unlikely in a governed Diesel tractor engine, but very common in diesel trucks on long downhill stretches where the engine overspeeds while descending in a low gear.

A third scenario would be excessive wear in the valve train, eg worn adjusters in a flat tapper valve train. This would be obvious to the analyst, though.

I spent something like 35 years as a development engineer working on Diesel engines and worked on keeper shear warranty issues.

Sheared keepers are an operator/ maintenance issue. All engines are subject to these failures.

It hurts for the op to hear this, but no Oem will cover an out of warranty claim when something so obvious to a trained and experienced warranty analyst as a case of sheared keepers is evident.

We don't know what the failure was for sure because the OP refuses to answer simple questions (if it was a Mfg. defect what is there to hide he can't answer these questions ???)
Also wondering why the block heater was laying on the ground in 1 of his photos.
Did it get knocked off, or fall off due to improper installation and overheated. Drill into the cylinder wall installing the block heater (like this thread?)https://www.tractorbynet.com/forums...84-damaged-block-installing-block-heater.html
Guess we will never know since we the OP refuses to answer simple questions.

 

[woolyAcres]

@finn1

Sheared keepers are an operator/ maintenance issue. All engines are subject to these failures.

I'm clearly ignorant on the internal design of engines. What's the proper maintenance for this?

 

[woolyAcres]

YEP,sure do it's called kioti tractor..How about you??

I don't follow this. Why does owning the same brand tractor mean you have a dog in this fight? Seems to me the only 2 parties with a dog in this fight are the original poster and Koiti/dealer. Who else could/would be on the hook for fixing this? Certainly not other Kioti owners.

Seems some here are arguing that this can't be Kioti's fault simply because if it were, somehow the tractor they own is now less valuable or durable. I don't follow that.

Like most forum members, I'd like to know more details but if I were the OP, I'd probably block this thread due to rude comments. That'd would be unfortunate for all the rest of us who will never get to hear the end of the story.

 

[radios1]

If the failure was a dropped valve caused by keeper shear, there are only a couple of scenarios that can cause this.

Keeper shearing occurs when valve seating velocity exceeds design criteria. The cause of the higher than designed seating velocity is lash in the system such that the Valve acceleration (deceleration) results in loads that exceed the strength of the keeper. The lash in the system allows the valve to slam onto the seat from the high velocity portion of the cam flank rather than on the low velocity ramp.

Ok, how does one get excessive lash? If the engine has hydraulic valve lifters, most likely it was run low on oil, allowing the hydraulic lifters to collapse.

Other scenarios are overspeed, which is unlikely in a governed Diesel tractor engine, but very common in diesel trucks on long downhill stretches where the engine overspeeds while descending in a low gear.

A third scenario would be excessive wear in the valve train, eg worn adjusters in a flat tapper valve train. This would be obvious to the analyst, though.

I spent something like 35 years as a development engineer working on Diesel engines and worked on keeper shear warranty issues.

Sheared keepers are an operator/ maintenance issue. All engines are subject to these failures.

It hurts for the op to hear this, but no Oem will cover an out of warranty claim when something so obvious to a trained and experienced warranty analyst as a case of sheared keepers is evident.

defective springs can cause this, as well as defective keepers, I've heard of both!. and there should not be excessive wear on the valve train on such a new engine unless it lost oil pressure.. so it's not necessarily an operator/ maintenance issue..

 

[JimR]

We don't know what the failure was for sure because the OP refuses to answer simple questions (if it was a Mfg. defect what is there to hide he can't answer these questions ???)
Also wondering why the block heater was laying on the ground in 1 of his photos.
Did it get knocked off, or fall off due to improper installation and overheated. Drill into the cylinder wall installing the block heater (like this thread?)https://www.tractorbynet.com/forums...84-damaged-block-installing-block-heater.html
Guess we will never know since we the OP refuses to answer simple questions.

The OP mentioned that the cylinder head cracked. If it dropped a valve and cracked the head the compression would go into the cooling chambers and blow the block heater out.

 

[JimR]

defective springs can cause this, as well as defective keepers, I've heard of both!. and there should not be excessive wear on the valve train on such a new engine unless it lost oil pressure.. so it's not necessarily an operator/ maintenance issue..

I agree with you 100 percent and a low mileage motor like this should not have run out of oil or lost oil pressure. There is no doubt a failure of a part which caused this to happen. Just like my tractor having a bad hand lever controller with only 345 hours on it that has seen minimum usage being pushed up and down over the past 2 years.

 

[4570Man]

I agree with you 100 percent and a low mileage motor like this should not have run out of oil or lost oil pressure. There is no doubt a failure of a part which caused this to happen. Just like my tractor having a bad hand lever controller with only 345 hours on it that has seen minimum usage being pushed up and down over the past 2 years.

There’s other reasons it could run out of oil. And this is the 3rd thread in a brief period that refuses to give any details yet claims they have been wrongly denied warranty. Anyone smell fish?