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Read articles →An owner-operator's deep-dive diagnosis of why the 1025R's 54" front snowblower vibrates intermittently, and it's not the carrier bearings. Using hand-drawn diagrams and about 20 minutes of explanation, he works through U-joint phasing on the mid-PTO shaft as the real culprit, explains how to cancel oscillations by aligning phases correctly, and briefly touches on his own 1025R modifications. Best for owners chasing this specific vibration problem who want the mechanical reasoning, not just a fix-it step.
Posted by the Daniel Konrad channel; content suggests an experienced owner sharing hands-on diagnostic work from personal use, with no commercial or dealership affiliation evident.
The mid-PTO shaft is splined with 20 splines, giving roughly a one in ten chance the U-joints end up phased correctly, which causes speed fluctuations that create vibration.
No, the chattering noise actually comes from underneath the tractor near the transmission, likely from straight-cut gear backlash, not from the carrier bearings or the snow blower itself.
With no load, the mid-PTO shaft runs straight into the snow blower, so there is no speed fluctuation in the U-joints and the vibration goes away.
