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Front wheel sealed tapper bearing/cross reference

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Working on installing trust bearings/washers for ease of steering on my A/C 917 Hydro and have a few questions or suggestions from other people on the front wheel bearings.

Does anyone have info on a Simplicity p/n to Timken bearing p/n? The parts book indicates p/n 154486 and on jack's it shows it superseded to p/n 2154486SM, in search of verifying what I've researched and found for the Timken bearing series p/n LM11900 (LM11949-LM11910).

Has anyone ever used a sealed tappered bearing or seals other then whats stock on the inner front wheels? stock seal p/n 170168 superseded to p/n 2170168SM or are the superseded/new seals different than what would have been stock on a A/C 917 Hydro?

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