Shimmy1
Senior Member
Ok, boys. I'm usually the one talking smart on here, but now I need some help/knowledge. 2009 CaseIH 485 Quadtrac. Iveco engine. These engines have what they call a compound turbo. It is a gear driven turbine that the exhaust goes through after the primary turbo. The object, supposedly, is that it helps draw the exhaust through at lower rpms to prevent the need for a wastegate turbo, and at full load the exhaust flow is supposed to drive against the turbine to provide added horsepower. It drives off of a gear train at the rear of the engine.
Now, for the problem. I was doing spring tillage with the tractor a few nights ago. About a round before :shf I was thinking I might be developing a fuel filter issue. Then, sudden loss of power along with strange noise. My first thought was a charge air line. Stopped the tractor and promptly noticed massive blue smoke out the exhaust and engine was running strange. Oh, oh. Got out of the tractor and discovered the primary turbo and exhaust manifold was glowing ORANGE, similar to a ripe pumpkin. My first thought was that it was possible it might take off on the oil, so I sat in the tractor with foot on the clutch and in gear so I might have a chance to kill it if needed. Shut it down after about 5 min.
Next morning, pulled exhaust off and found primary turbo was toasted. After further investigation, found that I was able to spin the compound turbo by hand. Pulled it off, and found I could turn the drive gear also. My thought is when the compound turbo stopped spinning, it created a great deal of backpressure for the primary turbo, causing it to overheat and fail. So, here's the dilemma. The power unit, clutch assembly, whatever you want to call the drive mechanism for the turbine is $6000. There is only one in the country. Until I can take it off and verify that it has failed and not the gear train, I am not going to order it.
My question, pardon the long post, is this. Does anybody have any experience with this situation. No dealer in this state has ever seen this happen, and nobody can tell me how that drive unit functions with any certainty. I don't have time to dig further due to planting right now.
Now, for the problem. I was doing spring tillage with the tractor a few nights ago. About a round before :shf I was thinking I might be developing a fuel filter issue. Then, sudden loss of power along with strange noise. My first thought was a charge air line. Stopped the tractor and promptly noticed massive blue smoke out the exhaust and engine was running strange. Oh, oh. Got out of the tractor and discovered the primary turbo and exhaust manifold was glowing ORANGE, similar to a ripe pumpkin. My first thought was that it was possible it might take off on the oil, so I sat in the tractor with foot on the clutch and in gear so I might have a chance to kill it if needed. Shut it down after about 5 min.
Next morning, pulled exhaust off and found primary turbo was toasted. After further investigation, found that I was able to spin the compound turbo by hand. Pulled it off, and found I could turn the drive gear also. My thought is when the compound turbo stopped spinning, it created a great deal of backpressure for the primary turbo, causing it to overheat and fail. So, here's the dilemma. The power unit, clutch assembly, whatever you want to call the drive mechanism for the turbine is $6000. There is only one in the country. Until I can take it off and verify that it has failed and not the gear train, I am not going to order it.
My question, pardon the long post, is this. Does anybody have any experience with this situation. No dealer in this state has ever seen this happen, and nobody can tell me how that drive unit functions with any certainty. I don't have time to dig further due to planting right now.
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