Hydraulic Oil Coolers by Machine Platform
Imara Engineering's hydraulic oil cooler catalogue is organised by machine brand and platform to make part identification straightforward and fast. This page is part of our Radiators and Coolers family. If your machine also requires an engine oil cooler, transmission oil cooler, or radiator alongside your hydraulic cooler, our team can source and confirm all components in a single order. Browse by machine platform below or contact us with your serial number for an immediate part match.
Caterpillar Hydraulic Oil Coolers
Caterpillar excavators and construction equipment operate their hydraulic systems under some of the most demanding duty cycles in the industry, and the Caterpillar hydraulic oil cooler is responsible for maintaining fluid temperature within safe limits across every one of those cycles. Imara Engineering stocks CAT hydraulic oil coolers as full assemblies and hydraulic cooler core replacements for the major Caterpillar excavator platforms.
Compatible CAT platforms include:
- CAT 308, 315, 320, 323, and 330 series excavators
- CAT 336 and 340 large excavator platforms
- CAT 906, 908, and 914 wheel loader hydraulic cooling fitments
- CAT D6 and D8 dozer hydraulic system coolers
- Additional CAT platforms available — contact our team with your serial number
Komatsu Hydraulic Oil Coolers
Komatsu excavators are among the most widely operated machines on construction and mining sites globally, and their hydraulic systems generate substantial heat under the high-cycle demands of daily earthmoving and loading operations. Our Komatsu hydraulic oil cooler range and Komatsu cooler assemblies are built to OEM specification for direct-fit installation across the Komatsu excavator and dozer lineup.
Compatible Komatsu platforms include:
- Komatsu PC130, PC200-8, PC290, and PC300 series excavators
- Komatsu PC400 and PC490 large excavator platforms
- Komatsu D65 and D85 dozer hydraulic cooler fitments
- Oil cooler Komatsu variants cross-referenced by serial number for confirmed fitment
Hitachi Hydraulic Oil Coolers
Hitachi ZX-series excavators are extensively deployed across civil construction, infrastructure, and resource extraction projects throughout Australia, Southeast Asia, the Middle East, and Sub-Saharan Africa. Our Hitachi hydraulic oil cooler range covers the primary ZX-series platforms operating in those markets, with full assemblies and hydraulic cooler core options available.
Compatible Hitachi platforms include:
- Hitachi ZX130, ZX135, ZX200, and ZX225 series excavators
- Hitachi ZX300, ZX350, and ZX450 large excavator platforms
- Hitachi ZX490 and ZX530 heavy mining excavator fitments
- Contact our team with your machine serial number for confirmation on any platform not listed
Hydraulic Oil Cooler Types Available from Imara Engineering
Understanding which hydraulic cooler type suits your machine's failure mode prevents ordering errors and avoids unnecessary cost. Imara Engineering supplies the following hydraulic cooling unit types:
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Full hydraulic oil cooler assemblies — complete replacement units including the cooler core, inlet and outlet tanks, and mounting hardware, used when the entire assembly has failed or been physically damaged beyond repair on site
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Hydraulic cooler core replacements — replacement core sections for machines where the tanks and mounting structure remain serviceable, allowing a lower-cost repair without replacing the full assembly
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Hydraulic heat exchanger excavator units — combined oil-to-water heat exchanger configurations used on excavator platforms where the hydraulic cooling circuit runs through the engine cooling system rather than through a standalone air-blast cooler
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Hydraulic fluid cooler assemblies — standalone hydraulic fluid cooling units for machines with dedicated hydraulic cooling circuits separate from the engine radiator circuit
If you are unsure which type your machine requires, our team will advise based on your machine model, the nature of the failure, and the condition of your existing assembly before your order is placed.
Why Hydraulic Oil Coolers Fail and What It Costs Your Operation
Hydraulic oil cooler failures do not always present as sudden or dramatic events. Many develop gradually and are misread as hydraulic pump wear, slow cycle speeds, or general machine fatigue until the underlying thermal cause is identified.
The Most Common Hydraulic Oil Cooler Failure Causes
- External fin and core blockage from fine dust, clay, and organic material packing into the cooler's air-blast fin array, reducing airflow and causing progressive fluid temperature rise without any physical cooler damage
- Internal core corrosion from poor hydraulic fluid maintenance intervals or contaminated fluid entering the cooler and attacking the internal core walls over time
- Physical core damage from rock strikes, bucket contact, or debris impact on machines operating in confined or rocky environments, causing immediate fluid leakage from the cooler body
- Seal and connection degradation at the cooler's inlet and outlet ports, allowing hydraulic fluid to bypass the cooler circuit under high operating pressures and causing a gradual but accelerating rise in system temperature
- Thermal fatigue cracking in older cooler cores subjected to repeated heat cycling beyond the original core material's design tolerance
The Operational Cost of Running with a Degraded Hydraulic Cooler
A hydraulic oil cooler that is partially blocked or operating below its rated thermal capacity does not stop your machine immediately. It degrades your machine progressively and invisibly. Hydraulic fluid running above its safe operating temperature loses its viscosity index faster, requiring more frequent fluid changes and accelerating wear on every hydraulic pump, motor, valve, and cylinder seal in the system simultaneously. The cost of a hydraulic oil cooler replacement is always significantly lower than the combined cost of replacing a hydraulic pump, rebuilding a hydraulic cylinder set, and sourcing a new directional control valve block. Address the cooler before the system forces you to address everything else.
Why Source Your Hydraulic Oil Cooler from Imara Engineering?
Direct-Fit Replacement with No Modification Required
Every hydraulic cooler excavator unit in our range is catalogued and cross-referenced to machine make, model, and serial number. OEM connection porting dimensions, mounting bracket geometry, and inlet and outlet orientation are all matched to your machine's original specification. Our team confirms fitment against your machine details before every order is processed, so the part that arrives on site goes directly onto your machine without any adaptation work.
Full Assembly or Core Only: Your Choice
Not every hydraulic oil cooler failure requires a full assembly replacement. If your cooler tanks and mounting structure are intact and only the core has failed, Imara Engineering supplies hydraulic cooler core replacements as a standalone option. Our team will advise which replacement type is correct based on your failure description and the condition of the existing assembly, ensuring you spend only what the repair actually requires.
Part of a Complete Cooling System Solution at Imara Engineering
Your machine's hydraulic oil cooler does not operate in isolation from the rest of its cooling system. Machines that experience hydraulic overheating frequently also show elevated engine coolant temperatures, degraded radiator performance, or failing fan motor output. Imara Engineering stocks the complete Radiators and Coolers range, including radiators, engine oil coolers, transmission oil coolers, intercoolers, fans, and hoses. If your machine requires more than one cooling component, contact our team, and we will source and confirm the complete parts list together, saving you procurement time and multiple freight costs.
