The self-tapping bolt attaches the belt cover and other components to the deck. It can also prevent moisture from seeping into the belts, which is important to extend the lifespan of the belt, especially in hot and humid climates. It keeps the belt clean and ensures smooth operation over time. The deck belt cover is a protective casing that safeguards the belts from dirt, grass clippings, and other debris. John Deere 42 Inch Mower Deck Parts Diagram (Courtesy: ) John Deere LH Belt Cover (1) It helps you understand how the mower deck works and makes it easier to troubleshoot malfunctioning parts. The Mower deck parts diagram is a visual guide to the inner workings of a John Deere mower deck. Craftsman 42 Riding Mower Parts Diagram & Functions
