Case Ingersoll mower deck bearing kit includes six bearings to replace C28971 bearings. Replaces part numbers A70280/C28971.
 
Used on almost all Case Ingersoll mower deck models including all used on 200/400 and 3000/4000 series tractors; for the left hand, right hand, and rear discharge decks.  The job requires 2 bearings per spindle almost all decks have three spindles, and 6 bearings total are needed for almost every deck. This kit included the 6 needed bearings to complete the job.
OPTION-  C10810 (3) Replacments Mower Deck Bearing Spacer Case Ingersoll insure optimal mower deck performance with Bearing Spacers, precisely designed for correct bearing preload! These are not just a "Spacer" But must be a very critical in service speced length. These do wear and will cause bearing failure and or poor mower performance! These go in all Case Ingersoll Mower Decks between both bearings in each hub, spindles slide through them. When replacing bearings we recommend replacing these as well unless yours have been changed recreantly. Sold as a kit of three. 
Instructions on how to replace bearings and very importantly how to repack
bearings can be found at Case Ingersoll Tractors Northeast on YouTube 
Link for Rebuilding Right Hand Discharge RM Style Decks
Link for Rebuilding Left Hand Discharge Decks
Link for how to repack new and used bearings