# Professional Maintenance Guide for the Front Engine Radiator of Summer Rough Terrain Forklifts

Professional Maintenance Guide for Front-Mounted Radiator of Rough Terrain Forklifts in Summer During high-temperature summer conditions, the maintenance of the front-mounted radiator on rough terrain forklifts is particularly critical. As the core component of the cooling system, the radiator's optimal condition directly affects engine efficiency and equipment lifespan. Below are professional-grade maintenance guidelines: I. Daily Inspection Standards Coolant Level Monitoring: Check the expansion tank coolant level before cold start each day (maintain between MAX and MIN); observe changes in the auxiliary tank level (abnormal drops indicate leakage). Coolant Quality Check: Use a refractometer to test coolant concentration (freezing point should be below -25°C); do not add tap water directly (prone to scale formation). Visual Inspection: Check for blockage between cooling fins (insects, cottonwood accumulation should not exceed 30% of area); feel the temperature difference between upper and lower hoses (normal range: 15-20°C). II. Deep Cleaning Procedures Physical Cleaning: Use a low-pressure air gun (≤3 bar) to blow out cooling fins from inside to outside; treat stubborn stains with a soft brush and neutral cleaning agent. Chemical Cleaning: Perform system flushing every 500 hours (using dedicated radiator cleaning solution); neutralize after cleaning (pH value 7-8). Backflushing: Remove the radiator for backflushing (pressure 1.5-2 kg/cm²); focus on flushing the sediment accumulation zone at the bottom of the radiator. III. Key Maintenance Measures Coolant Replacement: Ethylene glycol type is recommended for summer (concentration 40%-50%); replace every 2,000 hours or annually (flush first, then refill). Sealing System Testing: Pressure test (1.1 times working pressure, hold for 5 minutes); inspect all connection points for crystallization traces (white powder indicates leakage). Additional Protection: Install insect screens (mesh count ≥40); apply anti-corrosion coating on cooling fins (temperature resistance above 150°C). IV. High-Temperature Operation Countermeasures Work Management: Avoid continuous high-intensity operation between 11:00-15:00; set temperature alarms (automatic warning when coolant temperature ≥95°C). Emergency Handling: In case of overheating, idle the engine to cool down (do not shut off immediately); for minor boiling, release pressure slowly (cover the radiator cap with a wet cloth). V. Component Replacement Standards Radiator Cap: Replacement cycle 2 years; failure indicator is insufficient opening pressure of the pressure valve. Rubber Hoses: Replacement cycle 3 years; failure indicators are surface cracking or bulging. Radiator Core: Replacement cycle 5 years; failure indicator is more than 3 repair attempts. VI. Professional Diagnostic Methods Infrared Thermal Imaging: Detect localized hot spots (temperature difference >10°C requires inspection). Borescope Inspection: Examine internal corrosion of the radiator (focus on weld seams). Flow Rate Testing: Normal flow should exceed 90% of the design value. It is recommended to perform a systematic pressure test monthly and a comprehensive performance inspection quarterly. Changjian Construction Machinery offers free summer inspection services, including professional radiator pressure testing and cooling system efficiency analysis. Hotline: 400-XXX-XXXX. Proper maintenance can extend radiator lifespan by 3-5 years and reduce engine failure rates by over 40%.