Radiators and Coolers for Excavators, Construction Equipment, and Heavy Machinery:  OEM Quality, Worldwide Supply

Our Complete Radiators and Coolers Range

Imara Engineering's cooling system catalogue covers every major thermal management component in your machine. Each category below has its own dedicated page with full machine compatibility listings, OEM part number cross-references, and direct-fit replacement parts. Select the component your machine needs or contact our team for a complete cooling system quote.

Radiators

The excavator radiator is the primary heat exchanger in your machine's cooling circuit. When a radiator fails, coolant loss is rapid, and engine damage follows within minutes if the machine continues operating. Imara Engineering stocks full radiator assemblies and excavator radiator cores for Caterpillar, Komatsu, and Hitachi machines, from compact mini excavators through to large dozers and wheel loaders. All units are built to OEM specification for a direct bolt-on replacement with no modification required.

What we supply:

• Full radiator assemblies and excavator radiator core replacements
• CAT 302.5, 320D and D6; Komatsu PC200-8 and D65; Hitachi ZX-series fitments
• Aluminium-core and brass-copper construction options
• Loader, dozer, bulldozer, and mini excavator radiator fitments

Engine Oil Coolers

Engine oil coolers regulate oil temperature inside your diesel engine. When one fails, coolant enters the oil circuit and internal engine damage follows within hours of continued operation. Imara Engineering's engine oil cooler range is the deepest catalogue in our Radiators and Coolers family, covering 26 verified CAT engine platforms, including the C7, C13, C15, 3208, 3306, 3406, 3406B, and 3406E series, alongside Komatsu and Hitachi engine platforms.

What we supply:

• Caterpillar engine oil coolers across all major engine families
• Komatsu oil cooler units, including the PC200-8 platform
• Heavy-duty oil cooler assemblies for high-output engine applications
• OEM part number cross-referencing, including the 0R9056 reference

Hydraulic Oil Coolers

Every working cycle an excavator completes generates heat inside its hydraulic system. Without an effective hydraulic oil cooler, fluid degrades, seals fail, and pump damage accelerates into expensive unplanned repairs. Our excavator hydraulic oil cooler range covers full cooler assemblies, hydraulic cooler cores, and heat exchanger units for Caterpillar, Komatsu, and Hitachi machines, all built for direct-fit installation.

What we supply:

• Full hydraulic oil cooler assemblies and core replacements
• Caterpillar, Komatsu, and Hitachi excavator fitments
• Hydraulic fluid cooler and heat exchanger units
• Units rated for high-cycle construction and mining applications

Transmission Oil Coolers

Dozers, wheel loaders, and large excavators place extreme thermal demands on their transmissions, particularly during continuous high-cycle earthmoving operations. A failing transmission oil cooler accelerates gearbox wear and risks complete transmission failure. Imara Engineering stocks transmission and gearbox oil cooler assemblies for Caterpillar, Komatsu, and Hitachi machines, including final drive cooler units for dozer and loader applications.

What we supply:

• Transmission and gearbox oil cooler assemblies
• CAT and Komatsu transmission cooler fitments
• Final drive cooler units for dozers and wheel loaders
• Dozer and bulldozer transmission cooler options in stock

Intercoolers and Aftercoolers

Diesel intercoolers and aftercoolers reduce the temperature of turbocharged charge air before it enters the combustion chamber. Cooler, denser charge air improves combustion efficiency, increases power output, and reduces thermal stress on internal engine components. This is particularly important for machines operating in the high-ambient-temperature conditions common across Australian, African, and Middle Eastern job sites. Our range covers Caterpillar C13 and C15, Cummins 6BT, and other heavy machinery diesel platforms.

What we supply:

• Air-to-air and liquid-cooled diesel aftercooler units
• CAT C13 and C15 intercooler direct replacements
• Cummins 6BT and Detroit Diesel aftercooler coverage
• OEM core dimensions for direct bolt-on installation

Cooling Fans and Fan Motors

A radiator and oil cooler are only as effective as the airflow moving across them. A worn fan blade, a failed viscous fan clutch, or a seized hydraulic fan drive motor removes that airflow entirely, causing the entire cooling system to fail regardless of the condition of the cooler cores. Imara Engineering supplies excavator cooling fans, hydraulic fan motors, fan drive motors, and fan blades for CAT, Komatsu, and Hitachi machines.

What we supply:

• Hydraulic fan motor and fan drive motor assemblies
• Cooling fan blade replacements for major excavator platforms
• Viscous fan clutch units in stock
• CAT 320, Komatsu PC200, and Hitachi ZX200 fan motor fitments

Radiator Caps and Coolant Hoses

A failed radiator cap loses system pressure and empties your coolant in minutes. A cracked coolant hose can fail without any visible warning until complete rupture on site. These are the smallest components in your heavy equipment cooling system and among the most consequential when left uninspected. Imara Engineering stocks radiator caps and coolant hoses for Caterpillar, Komatsu, and Hitachi machines, including upper and lower hoses, bypass hoses, coolant overflow tanks, and OEM-rated pressure caps.

What we supply:

• Pressure-rated radiator caps for CAT, Komatsu, and Hitachi
• Upper, lower, and bypass coolant hose kits
• Coolant overflow tank assemblies
• Part number lookup by machine model is available on request

Why Source Your Cooling Parts from Imara Engineering?

There is no shortage of parts suppliers in the market. Very few combine OEM-matched build quality, machine-specific fitment confirmation, deep catalogue breadth, and fast international dispatch the way Imara Engineering does consistently.

OEM Quality at Aftermarket Pricing

Every radiator, oil cooler, intercooler, and fan motor in our range is manufactured to OEM specification using quality-grade aluminium, copper, brass, and industrial rubber compounds. The materials are the same. The thermal performance ratings are the same. The service life expectation is the same. What is different is the price. Imara Engineering exists to give fleet operators and procurement teams access to genuine-quality cooling parts without the dealership markup built into every OEM invoice.

Fitment Confirmed Before You Order

Every part in our heavy machinery cooling parts catalogue is cross-referenced against machine make, model, and serial number. If you are not certain about compatibility, our team confirms correct fitment before your order is placed. We cover:

1. Caterpillar (CAT) — 300-series excavators, D-series dozers, 900-series wheel loaders, and the C7, C13, C15, 3306, and 3406 engine families
2. Komatsu — PC200, PC300, D65, and D85 excavator and dozer platforms
3. Hitachi — ZX-series excavators and construction equipment
4. Volvo CE, Doosan, and John Deere construction equipment platforms

Fast Worldwide Shipping

Imara Engineering dispatches to Australia, the United States, Canada, and internationally. Every order is processed promptly and dispatched without unnecessary delay. Contact our team for part availability and an accurate lead time to your specific location. We provide real timelines, not generic estimates.

Expert Parts Matching on Every Order

Provide your machine make, model, and serial number, and our team will identify the correct cooling part accurately and quickly. If you have an OEM part number, we cross-reference it directly. Getting the right heavy equipment cooling system part to the right machine on the first shipment is not an added service at Imara Engineering. It is the standard.