Watch our video about how to replace a shear pin on an Ariens snow blower. The shear pins are designed to break when the auger shaft is over-torqued, so the gear case won't be damaged if you get something stuck in the augers.
Watch our video on how to replace the skid shoes on a Toro two stage snow blower. The skid shoes slide along the ground to protect the sides of the auger housing from damage. They also allow you to adjust the clearance between the scraper blade and the ground.