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Recently, most regions across China have entered a high-temperature and rainy construction peak, with projects including highway new construction, municipal renovation and industrial park infrastructure advancing rapidly. Long-term exposure to intense heat, heavy-load operation and rain erosion makes road rollers prone to failures such as engine overheating, hydraulic leakage, bearing overheating and circuit oxidation. To improve construction efficiency for end customers, reduce equipment failure rates and extend overall service life, relying on the working condition characteristics of Luoyang Lutong full-series single-drum, double-drum and light-duty road rollers, Luoyang Lutong Heavy Industry officially released the 2026 Special Summer Maintenance Guidelines. The brand has implemented standardized summer maintenance services for cooperative construction sites, distributors and maintenance stations nationwide to build a solid safety line for road construction equipment in summer.
Different from conventional working conditions in spring and autumn, summer construction features five major characteristics: high ambient temperature, large day-night temperature difference, heavy construction site dust, frequent short-term rainfall and longer continuous equipment operation hours. According to the after-sales operation and maintenance big data of Luoyang Lutong, road roller failures from June to August account for far more proportion than other periods all year round. Five common failures including engine heat dissipation failure, excessive hydraulic oil temperature, aging vibration bearing caused by insufficient grease, storage battery terminal oxidation and excessive impurities mixed in oil and water account for 72% of total summer equipment failures. These failures will not only increase maintenance costs, but also delay road compaction construction period and impair the molding quality of asphalt and cement stabilized macadam layers. Targeting common industry pain points, the after-sales technical team of Luoyang Lutong has developed hierarchical maintenance schemes based on original equipment adaptability, covering daily pre-shift maintenance, weekly special inspection and quarterly in-depth maintenance, which cover four core systems: power system, hydraulic system, traveling vibration system and electrical heat dissipation system.
Targeting Summer Working Condition Pain Points, Formulating Four Core Special Maintenance Rules
1. Power & Heat Dissipation System: Prevent Engine Overheating to Support Continuous Operation in Extreme Heat
The surface temperature of construction sites can exceed 50℃ in summer, doubling the heat dissipation load of road roller engines during long-term idle compaction and reciprocating operation. Luoyang Lutong stipulates that after daily operation, all series rollers shall clean asphalt residue, dust and catkins attached to water tanks, oil radiators and cylinder cooling fins with low-pressure clean water to avoid blocked heat dissipation air ducts. Original high-viscosity high-temperature resistant engine oil for summer shall be replaced in a standardized manner: new equipment shall complete the first summer maintenance after 50 working hours, and stock equipment shall replace engine oil and oil filter every 250 working hours. Operators shall regularly open the diesel water drain valve to drain accumulated water in fuel tanks, preventing fuel injector stalling and insufficient power caused by high-temperature water vapor mixed into fuel. In addition, qualified antifreeze fluid must be filled instead of clean water to avoid scale formation and pipeline corrosion inside water tanks.
2. Hydraulic Transmission System: Prevent Leakage and Control Oil Temperature to Ensure Stable Compaction Accuracy
High temperature will accelerate the viscosity attenuation of hydraulic oil, easily causing pipeline oil leakage, weak vibration and steering jamming. The summer maintenance rules clarify that Lutong road rollers shall clean gearboxes and replace original high-temperature resistant gear oil every quarter. Maintenance personnel shall inspect aging hydraulic pipe joints and gaskets comprehensively, and replace high-temperature special sealing parts. The alarm threshold of hydraulic oil temperature is set at 85℃, and equipment must stop operation for heat dissipation once the temperature exceeds the standard. The hydraulic oil tank shall be cleaned to remove internal sediment every half year, and original summer anti-wear hydraulic oil shall be adopted. Mixed use of hydraulic oil of different brands is forbidden to avoid high-temperature emulsification and deterioration of oil products, so as to stabilize drum vibration frequency and traveling speed and meet high-standard compaction requirements of asphalt pavements.
3. Traveling & Vibration System: High-temperature Lubrication to Resist Rainwater Corrosion and Wear
Muddy construction sites in rainy summer days lead to water ingress, rust and grease failure of vibration drums, articulated bearings and transmission shafts. Luoyang Lutong after-sales specifications require that for high-frequency operating equipment, 20g high-temperature blue lithium-based grease shall be injected into vibration bearings every 7 days, and 10g special lubricating grease shall be injected into articulated bearings. Operators shall fasten bolts of engine mounting brackets, transmission shafts and drum fixing parts weekly and calibrate bolt torque error. After rainfall, staff shall prioritize inspecting the sealing performance of vibration drums, replace damaged oil seals timely and drain accumulated water inside drums to avoid jamming and rust of internal bearings. For tire road rollers, tire pressure shall be checked regularly to prevent tire burst caused by excessive pressure under sun exposure.
4. Electrical Safety System: Moisture-proof and Anti-oxidation to Avoid Circuit Failures in Rainy Seasons
High temperature and humidity easily cause oxidation and short circuit of storage batteries and circuit connectors. The maintenance scheme requires keeping the battery voltage above 12V daily, polishing oxidized battery terminals, applying protective grease and fastening wiring terminals. High-pressure water guns are prohibited to directly flush electric control boxes, sensors and circuit plugs, and electrical interfaces shall be dried in time after rainy operation. Aging and damaged outer circuit sheaths shall be fully inspected and insulated to prevent short circuit and fire caused by circuit baking by high-temperature equipment body. Meanwhile, standardized maintenance safety procedures are formulated: cut off power, disconnect battery negative pole and release residual hydraulic pressure before maintenance to implement site equipment maintenance safety regulations.
Deliver Terminal Maintenance Services to Empower Efficient Project Delivery Nationwide
Apart from standardized maintenance specifications, Luoyang Lutong has launched a national summer equipment support campaign. Relying on more than 100 authorized service stations nationwide, the brand provides four free services for cooperative customers including summer vehicle condition inspection, heat dissipation system cleaning, oil quality testing and bolt fastening. For key municipal and highway livelihood projects, the brand offers 24-hour on-site emergency repair and on-station maintenance services, guides operators to conduct standardized summer operation, and popularizes practical skills including staggered operation in high-temperature periods, idle heat dissipation and post-rain equipment maintenance.
According to the after-sales director of Luoyang Lutong, as a professional compaction equipment manufacturer based in Central China, the brand prioritizes full-life cycle equipment operation and maintenance. Different from general construction machinery maintenance standards, Luoyang Lutong builds seasonal maintenance systems adapting to climates across north and south China by virtue of original spare parts and exclusive working condition data. In the future, the brand will continuously update maintenance knowledge base for high-temperature, rainy and winter working conditions, open online access to maintenance videos and electronic manuals, lower maintenance thresholds for small and medium-sized construction teams, and boost safe, efficient and high-quality progress of national road infrastructure projects via premium equipment and full-life cycle maintenance services.
