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4444691
Radiator Model 4444691 is custom-built exclusively for the Hitachi EX1200-5 Mining Excavator, delivering targeted cooling performance. Here's how it works: hot compressed air moves through the core, transferring heat to the tube inner walls. The fins then expand the contact area between air and tubes for efficient heat conduction—boosting overall cooling efficiency. Finally, as air flows over the fins, the heat from the tubes is released into the ambient air, keeping your excavator running cool.
Features
Excellent Cooling Efficiency: Delivers top-tier cooling performance—quickly lowers charge air temperature, boosts air density, and ramps up combustion efficiency to keep your engine running at peak performance.
Lightweight Aluminum Build: Aluminum brings two key advantages: fast heat dissipation to stay cool, and reduced weight that cuts down on fuel consumption (boosting economy) and eases overall vehicle load.
Strong High-Pressure Sealing: We use vacuum brazing and multi-point welding to make it tough enough to handle pressure and vibration—so it works reliably even in tough, complex operating conditions.
Aluminum Radiator List
CAT | 320-8196, 323-1741, 533-8330, 534-7440, 534-3807, 535-4527, 535-4523, 387-4367, 2W-6587, 2W-6593, 7W-5455, 7W-2173, 9Y-3318, 7C-3385, 2W-5539, 2W-5540, 2W-6632, 223-5118, 374-3545, 387-4366 |
KOMATSU | 427-03-22820, 6251-61-5110, 569-03-89191, 6212-62-4100， 423-03-32212, 423-03-32211, 426-03-37591, 426-03-37571, 427-S05-1810, 195-03-63114, 195-03-65181, 195-03-43400 |
HITACHI | 4682425, 4682426, 4444691, 4658096, 4427952, 4729782, 4421620, 335611, 4439687, YA00008446, 1386-621-100, 1381-639-801, 1381-639-8020, 1381-639-8030 |
LIEBHERR | 10000392, 5617986, 5617987, 11823532, 11821219, 11821218, 5611936, 5611937, 10333648, 10333649 |
Maintance and Service
Customized Solutions – We provide tailor-made cooling systems to meet the exact requirements of your engines and working environments.
How We Produce
Our aftercoolers incorporate advanced CAD modeling and thermal simulation processes, which are designed to facilitate the optimization of airflow and cooling efficiency. We utilize high-grade aluminum alloy, a material that offers excellent thermal conductivity and corrosion resistance—both of which are critical characteristics for ensuring long-term durability.
Our fin-and-tube assemblies are manufactured with precision to increase heat transfer surface area. Vacuum brazing technology is employed to ensure leak-free and robust bonding between components, while critical joints are further reinforced through TIG or MIG welding to enhance overall reliability.
Pictures of Sinrui's production workshop, raw materials
Radiator product packaging and delivery
