Rotary drilling rigs are essential equipment in infrastructure construction. During spring and autumn, fluctuating temperatures and increased dust exposure can accelerate wear and reduce equipment efficiency. Proper maintenance is critical to ensuring stable operation and extending service life. This guide highlights key maintenance practices for the engine, fuel system, transmission, travel mechanisms, and working components—helping your equipment perform reliably in challenging seasonal conditions.     1. Engine & Fuel System (Power Core) The engine is the heart of the machine, while the fuel system ensures consistent power delivery. Seasonal adjustments and cleanliness are essential to avoid power loss and overheating. Tips: Engine Oil & Filters:Use 15W-40 oil in spring, and adjust to 10W-30 or 15W-40 in autumn depending on ambient temperature. Replace engine oil and fuel filters regularly.Check oil level and condition—replace immediately if contamination, emulsification, or unusual odor is detected. Air Intake & Fuel System:Clean or replace air filters more frequently due to dust and sand.Drain water and impurities from the fuel tank. Inspect fuel lines and connections to prevent leaks and contamination.     2. Transmission & Travel System These systems function as the “limbs” of the equipment, requiring proper lubrication, tightening, and inspection to ensure smooth movement and efficient power transmission. Tips: Rotary Drive Gearbox & Reducer:Replace gear oil after the first 500 hours, then every 2,000 hours or annually (whichever comes first).Maintain oil level at half of the inspection window and check for leaks.Inspect gears, bearings, and shafts; clean and lubricate guide rails to prevent jamming. Travel & Slewing Mechanism:Adjust track tension properly. Inspect track shoes and rollers for smooth operation.Replace lubrication oil in travel and slewing reducers.Check for leaks, abnormal noise, and ensure brake pressure remains within 3–5 MPa for reliable operation.     3. Working Components Working components are directly exposed to harsh construction conditions and are subject to impact and wear. Regular inspection, cleaning, lubrication, and replacement are essential. Tips: Kelly Bar & Drilling Tools:Inspect threads, keyways, and welds for cracks, deformation, or excessive wear.Clean thoroughly and apply grease to prevent corrosion.Replace worn or damaged teeth and tighten all loose components. Winch Wire Rope:Regularly inspect main and auxiliary winch ropes. Replace immediately if excessive wear, broken wires, or corrosion is detected.Ensure proper rope arrangement on the drum and secure pressing devices.Lubricate regularly and check brake pads and clutch plates to ensure responsive braking.

Construction machinery operating in high-temperature environments requires regular inspection and maintenance to ensure stable performance and prevent unexpected downtime. Just like any vehicle, your equipment also needs routine checks to keep it running smoothly.     1. Troubleshooting Engine Overheating   Possible causes of engine overheating: Loose fan belt Insufficient or deteriorated coolant Blockage on the outside of the radiator Internal blockage inside the radiator Thermostat malfunction Water pump failure Blocked internal engine coolant passages   Inspection tips: Start by checking the condition and tension of the fan belt. Then confirm whether the coolant level is sufficient and inspect for scale or deposits when draining the coolant. Next, check whether the radiator fins are blocked externally. Finally, determine whether the thermostat or water pump may be damaged.   2. Checking Air Conditioning Cooling Performance   Regular inspection of the air-conditioning system The air-conditioning pipeline and related components should be inspected regularly. If the air conditioner is not used for a long period, it is recommended to run the system once a month for about 10 minutes. For air conditioners with heating functions, antifreeze should be added to the circulating coolant.   Routine maintenance schedule Monthly: Check whether the refrigerant level and compressor operation are normal. Every 6 months: Inspect the refrigerant pipes, condenser fins, electromagnetic clutch, wiring, connectors, and control switches. Annually: Check joints, the dryer, AC unit, sealing conditions, belts and tension, and the installation of mounting brackets.   Common troubleshooting solutions Intermittent cooling: Replace the dryer, vacuum the system again, refill refrigerant, repair or replace the temperature sensor, and inspect grounding wires, control switches, and relays. Increased noise: Adjust or replace belts, compressor brackets, evaporator fan blades, or repair/replace the clutch or compressor. Insufficient heating: Check air doors for obstructions, ensure engine coolant temperature has risen before turning on heating, and repair or replace pipelines if necessary. No cooling: Check the blower and compressor first. If both are functioning normally, inspect refrigerant levels. If abnormal, examine components for damage. Poor cooling performance: Check blower airflow and evaporator airflow, clean or repair the condenser fan, adjust refrigerant levels or belt tension, replace air filters, remove blockages, defrost if necessary, and clean condenser fins.     Regular inspections and proper maintenance in high-temperature environments can significantly improve equipment reliability, extend service life, and ensure efficient operation in demanding construction conditions.