Hey everyone, happy labor day to the hard working men and women of this group! I have a komatsu d39 ex21. When the machine gets good and warm (usually after the first hour) and I am pushing hard, the machine will randomly get very loud and it seems to be possibly coming from the exhaust. It does not do it when fine grading. No codes are being thrown on the dash and no noticable power loss is happening when the issue occurs? Is it possible once the machine is warm and working hard that something could be happening with the turbo or exhaust back pressure? Thanks for any help!
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