The hour meter provides a valuable baseline regarding the operational history of a second hand tractor. However, mechanical hour meters can be tampered with or disconnected. Always cross-check the recorded reading against physical wear on the foot pedals, steering wheel, clutch linkage, and seat to determine whether the stated usage reflects reality. https://www.americasmallbiz.com/articles/how-to-extend-the-life-of-your-tractors-diesel-engine