Given the characteristics of bulldozers operating under prolonged high loads and complex conditions at construction sites, a systematic maintenance and care guide has been further refined. From daily inspections and scheduled maintenance to fault handling and safety precautions, it provides clear direction for ensuring efficient equipment operation across diverse construction environments.

For daily maintenance, conduct a visual inspection before starting the bulldozer. Check structural components for damage or loosening, verify critical fluid levels (fuel, engine oil, coolant), and inspect the hydraulic system, working attachments, electrical circuits, and hoses for leaks, cracks, or abnormal wear. During operation, operators must continuously monitor instrument readings, paying attention to parameters like water temperature, oil temperature, and oil pressure. They should also listen for unusual sounds from the engine and transmission system, immediately shutting down the machine for inspection if any abnormalities are detected. After completing work, the machine body, tracks, radiator, and other components must be cleaned. Wear on vulnerable parts such as the dozer blade and idler wheels should be inspected, and lubrication maintenance must be performed as required.

For scheduled maintenance, bulldozers have defined intervals for servicing the engine, transmission system, hydraulic system, and brake/steering system. For example: The transmission system requires checking the transmission fluid level, replacing the filter, and monitoring the condition of the shift mechanism and gear meshing. The hydraulic system must maintain clean oil, with regular replacement of hydraulic fluid and filters, while also inspecting hydraulic pump pressure and cylinder seal integrity. The braking and steering system should focus on brake pad wear and brake fluid level to ensure responsive and reliable operation.

For common faults, the guide emphasizes rapid troubleshooting approaches. For instance, engine failure to start may stem from insufficient fuel, clogged filters, or low battery voltage; sluggish travel system response often relates to inadequate hydraulic pressure; and slow bucket lifting could result from hydraulic cylinder seal failure or hydraulic pump malfunction. Systematically checking fuel lines, electrical circuits, and hydraulic circuits can significantly reduce downtime.

Safety protocols are also paramount during maintenance operations. All electrical, hydraulic, or mechanical repairs must be performed with the power disconnected and the machine shut down, using standard-compliant tools and replacement parts. Maintaining cleanliness is especially critical during hydraulic system repairs to prevent contaminants from entering and causing secondary damage. After maintenance, the equipment must undergo comprehensive testing to confirm all functions are normal before resuming operation.

Overall, the lifecycle management of bulldozers relies not only on robust mechanical performance but also on a standardized, continuous maintenance system. Strict adherence to daily inspections, regular maintenance, and standardized repair procedures significantly enhances equipment reliability, reduces failure rates, and provides more stable and efficient construction support for engineering operations.