Machinery working in farmland, rainy seasons and swampy sites is exposed to long-term mud and water. Thick mud easily adheres to the chassis, pins, walking mechanism and pipelines. Uncleaned mud locks moisture, causing metal corrosion, hinge jamming and pipeline blockage, and wearing core structural parts continuously. Most users only maintain engines and hydraulic systems while ignoring chassis protection, resulting in chassis aging, deformation and walking failures, reducing equipment stability greatly. After muddy operation, thoroughly flush residual mud, dry accumulated water, lubricate pins and hinges, and complete anti-rust protection. Daily simple maintenance effectively avoids chassis failures and stabilizes overall equipment performance.