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, emulsificat

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