Yanmar Vio55 Kubota KX080 Excavator Radiator Mini Compact Aluminum Cooling

Product Specification

Product Overview

This compact aluminum radiator is designed for Yanmar Vio55 and Kubota KX080 mini excavators in the 5-8 ton class. The unit provides a direct-fit replacement for the original cooling system component, featuring a 2-row brazed aluminum core optimized for the compact engine bay dimensions of mini excavators.

Cause

Mini excavators operate in confined spaces with restricted airflow through the cooling system. The compact radiator size means less heat exchange surface area is available compared to larger machines, making mini excavators more sensitive to any reduction in cooling efficiency. Garden debris, grass clippings, and fine soil particles commonly accumulate in the fin stack during landscaping and utility work, reducing airflow. Additionally, the smaller coolant volume in mini excavator systems means the coolant temperature responds more quickly to changes in engine load, requiring the radiator to maintain peak efficiency at all times.

Solution

The compact radiator matches all original Yanmar and Kubota dimensions for direct installation in the confined engine bay of mini excavators. The 2-row brazed aluminum core provides adequate cooling capacity for the 30-50 kW engine outputs typical of 5-8 ton machines, with tube wall thickness of 0.35 mm to minimize weight while maintaining pressure integrity at 0.9-1.1 bar operating pressure.

Specifications

Compatible Model: Yanmar Vio55 / Kubota KX080
Core Material: Brazed Aluminum
Core Configuration: 2-Row
Core Dimensions: 420 mm (W) x 380 mm (H) x 20 mm (T)
Inlet Pipe OD: 28 mm
Outlet Pipe OD: 32 mm
Fin Density: 18 FPI
Tube Wall Thickness: 0.35 mm
Operating Pressure: 0.9-1.1 bar

Application

Suitable for Yanmar Vio55 and Kubota KX080 mini excavators used in landscaping, utility installation, residential construction, and confined-space excavation. The 2-row core supports operation in ambient temperatures up to 35°C. For mini excavators operating in tropical climates above 35°C, more frequent fin cleaning is recommended to maintain cooling efficiency.

How It Works

The compact radiator operates on the same heat exchange principle as larger units but with reduced dimensions to fit the mini excavator engine bay. Coolant from the compact diesel engine enters through the smaller-diameter inlet pipe and flows through two rows of aluminum tubes. The higher fin density of 18 FPI compensates for the smaller core surface area by increasing heat transfer per unit volume. Airflow is provided by the engine-driven fan, which in mini excavators is typically smaller in diameter but operates at higher rotational speed to achieve adequate face velocity through the compact fin stack.

How To Choose

Verify your mini excavator brand and model number, as Yanmar and Kubota radiators are not interchangeable despite similar machine sizes. Measure the core dimensions of your existing unit and confirm pipe connection diameters. Mini excavator radiators are highly model-specific, so accurate identification is essential before ordering.

FAQ

Q: Can this radiator be used interchangeably between Yanmar and Kubota?
A: No. Yanmar and Kubota use different mounting patterns and pipe positions. Order the correct variant for your brand.

Q: How often should I clean the fins on a mini excavator?
A: Every 50-100 operating hours in dusty or debris-heavy conditions, or every 250 hours in clean environments.

Q: Does this include the oil cooler?
A: This is the radiator only. Mini excavator oil coolers are typically mounted separately.