The shields were an improvement made to later decks to help keep crap from forcing its way into the bearing area. No....they are not a necessity because thousands of decks were made prior to them being introduced. However, such changes often come about as a result of dealer feedback about the product. So...... it's your choice. You can order a set from Brian on the basis that they might help with bearing life or you can just run without them like many owners do. :thumbsup:
EDIT:
You can also order those parts from Bob at CaseGardenTractorParts.com. This site highly recommends both dealers.
EDIT:
You can also order those parts from Bob at CaseGardenTractorParts.com. This site highly recommends both dealers.