The maintenance schedule for a cantilever roadheader varies depending on the specific model and usage frequency. Generally, the following are common maintenance tasks and their suggested intervals:

　　Daily Maintenance:

　　Check all fasteners for looseness and tighten if necessary.

　　Clean the machine's surface and interior to remove dust and dirt.

　　Inspect the lubrication system to ensure all lubrication points have sufficient oil.

　　Check the electrical system, including cables and connectors, for wear or damage.

　　Record daily operating data and note any abnormalities.

　　Weekly Maintenance:

　　Lubricate all movable parts.

　　Inspect the wear of the cutting head and tools, and replace them if necessary.

　　Check the functionality of the support and propulsion systems.

　　Inspect the hydraulic system, including oil levels, leaks, and pressure gauge readings.

　　Check the cooling system to ensure proper coolant flow and temperature.

　　Monthly Maintenance:

　　Conduct a more thorough inspection, including the motor and gearbox.

　　Inspect the electrical control cabinet to ensure all components are functioning properly.

　　Check the hydraulic pumps and valves for leaks or performance degradation.

　　Perform preventive testing on electrical circuits, including insulation testing.

　　Inspect spare parts to ensure they are in good condition.

　　Quarterly Maintenance:

　　Perform a comprehensive inspection of the entire machine, including structural and key components.

　　Lubricate and inspect all bearings.

　　Conduct a detailed inspection of the electrical system, including cable integrity and connector contacts.

　　Thoroughly inspect the hydraulic system, including oil quality and filters.

　　Perform a thorough inspection of the cooling system, including pumps and radiators.

　　Annual Maintenance:

　　Conduct an extensive maintenance procedure, including in-depth inspection and necessary replacement of all components.

　　Perform a complete cleaning and sanitization of the machine.

　　Calibrate and test all electrical equipment.

　　Perform performance tests on all hydraulic equipment.

　　Inspect and replace all spare parts as needed.

　　Please note that the above intervals are for reference only. The actual maintenance schedule should be adjusted based on the manufacturer's recommendations and actual usage conditions. Regular maintenance not only extends the equipment's lifespan but also improves work efficiency and safety. Before performing any maintenance work, ensure compliance with relevant safety regulations and operating guidelines.