Sears PartsDirect shows how to replace the shear pin on a snowblower when it breaks. The shear pin breaks to protect more expensive components if you hit a hard object.
You can order replacement snowblower parts and find snowblower repair guides at https://www.searspartsdirect.com?sid=soc:youtube:how-to-replace-snowblower-shear-pins
Or call 1-800-437-1673 to speak with a parts specialist.