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SKU:
NLT1F00408
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Kubota Excavator Radiator RD411-42300
$270.99
In Stock
$270.99
Sale price
$270.99
Regular price
This new aftermarket aluminum-and-plastic radiator replaces Kubota RD411-42300 for compatible KX121-3S, KX161-3, U45-3, and U50-3 excavators.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Kubota KX121-3S compact excavator
- Kubota KX161-3 compact excavator
- Kubota U45-3 and U45-3ST compact excavator
- Kubota U50-3 compact excavator
Product Overview
A cracked tank, bent core, persistent coolant seepage, or overheating after the fan, belt, thermostat, pump, and airflow are checked may require radiator replacement. Packed debris between coolers is especially common on compact excavators and can mimic an undersized radiator.
The radiator removes engine heat through coolant tubes and airflow. It cannot fix combustion gas entering the cooling system, a slipping fan belt, incorrect coolant, or an obstructed oil cooler in front of it.
Match RD411-42300, overall core and tank dimensions, inlet and outlet position, mounting pins, cap neck, drain, transmission or auxiliary fittings, machine model, and serial number.
Key Features & Performance
- Aluminum core with molded tank configuration as shown
- Hose and mounting locations for compatible excavators
- Replacement after core impact, tank cracking, or corrosion
- Restores heat-exchanger capacity when airflow and coolant flow are correct
Replaces Part Numbers
- RD411-42300
Common Uses
- Replacing a radiator punctured by debris
- Stopping coolant seepage from a cracked tank seam
- Repairing overheating caused by a confirmed restricted core
Technical Specifications
- Product Type: Engine coolant radiator
- Equipment: Compatible Kubota compact excavators
- Primary Reference: RD411-42300
- Condition: New aftermarket replacement
Installation & Fitment
- Let the machine cool and relieve pressure
- Clean debris from the full cooler stack
- Compare every mount and connection
- Use new hoses, clamps or isolators where needed
- Refill, purge air, pressure-test, and verify fan airflow
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Can a dirty oil cooler make the engine overheat? A: Yes. Debris between stacked coolers can block radiator airflow.
Q: Does the radiator include a cap? A: Only the parts shown in the product photos are included.
Q: Will it fit every KX161-3? A: Serial number and radiator configuration must be compared to RD411-42300.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: Kubota RD411-42300 radiator, KX121-3S overheating repair, KX161-3 radiator replacement, U45-3 coolant leak, Kubota excavator cooling core
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.