What Radiator Size Fits my Case? Size Guide With Measurements

Top 3 picks at a glance

Best overallSkid Steer Radiator Compatible with Case IH 1840 1845C Models With OEM...Check price

Runner-upRadySpeed A172038 Aluminum 3Row Radiator fit Case 580 580k Series I II...Check price

Also great3 Row Aluminum Radiator Fits for Case 1840 1845C Skid Steer Loader...Check price

The Short Answer

To determine what radiator size fits my case machinery, you must identify three critical factors: your equipment’s specific model number, the OEM (Original Equipment Manufacturer) part number, and the physical core dimensions of your current radiator. Unlike standard automotive cooling systems, industrial Case equipment—such as the Case 1840 and 1845C skid steers or the 580 series backhoes—uses highly specialized heavy-duty radiators.

For most Case skid steers, the standard overall radiator package size is approximately 28.7 x 24.0 x 7.5 inches (73 x 61 x 19 cm), featuring a 3-row aluminum core. For Case backhoes, the overall dimensions are slightly narrower but taller, typically averaging 27.5 x 20.5 x 5.5 inches (70 x 52 x 14 cm). Replacement units generally cost between $230 and $400 depending on the row count, construction material, and bracket configuration.

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#1 Pick

Skid Steer Radiator Compatible with Case IH 1840 1845C Models With OEM Part Numbers Listed

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#2 Pick

RadySpeed A172038 Aluminum 3Row Radiator fit Case 580 580k Series I II III Super K Backhoe-Replacement Radiator for Case 580 580k Series I II,III Super K Backhoe

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#3 Pick

3 Row Aluminum Radiator Fits for Case 1840 1845C Skid Steer Loader 1347609C1 1A12192

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#4 Pick

HWANHUI New 3-Row Aluminum Radiator Fit for Case 1840 1845C Skid Steer Loader | Replaces OEM 1347609C1 1A12192，73x61x19 cm Cooling System Replacement

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Standard Sizes

When shopping for a replacement radiator for Case industrial and agricultural machinery, you will find that sizes are highly standardized by model series. The table below outlines the exact dimensions, part numbers, and price ranges for the most common Case equipment radiators found on the market today.

How to Measure Your Space

To ensure a perfect drop-in fit without needing custom fabrication or bracket modifications, you must manually measure your existing radiator. Follow these steps to obtain precise measurements:

• Measure the Core Height: Place your tape measure inside the top and bottom tanks. Measure only the finned area from the top solder joint to the bottom solder joint. Do not include the thickness of the tanks themselves in this measurement.
• Measure the Core Width: Measure the finned area from the left side member to the right side member. Again, do not include the side mounting brackets or outer framework in this specific measurement.
• Measure the Core Thickness: Insert a small ruler or wire gauge between the fins to measure the depth of the core, or measure the outer edge of the core block. This will tell you if you have a 2-row, 3-row, or 4-row system. Standard 3-row aluminum cores are typically 2 to 2.2 inches thick.
• Verify Overall Dimensions: Measure the absolute outermost edges of the radiator, including the top tank, bottom tank, side brackets, and mounting pins. This ensures the unit will slide cleanly into the machine’s engine bay shroud.
• Check Inlet and Outlet Diameters: Measure the outer diameter of the hose connections. Common sizes for Case heavy machinery are 1.75 inches for the top inlet and 2.0 inches for the bottom outlet. Note their exact positions (e.g., top-left inlet, bottom-right outlet) to guarantee your radiator hoses will reach without kinking.

By Room or Use Case

Industrial machinery operates in incredibly demanding environments. Matching your radiator size and construction to your specific operational use case is essential for maximizing engine life and preventing thermal lockups.

Skid Steer Loaders (Debris-Heavy Environments)

Case skid steers, particularly the 1840 and 1845C models, are frequently used in agricultural barns, demolition sites, and dry forestry environments. These spaces are prone to high airborne particulate matter, straw, and dust. For this use case, a 3-row aluminum radiator with an overall size of 28.7 x 24.0 inches is ideal. Aluminum offers rapid heat dissipation, and a 3-row configuration provides a generous surface area without making the fin density so tight that it instantly clogs with dust. Operators working in heavy brush should look for models with heavy-duty steel fan guards to protect the cooling fins from flying debris.

Backhoes and Excavators (Continuous High-Torque Work)

For Case 580 series backhoes, the engine runs under continuous hydraulic load, often in stationary positions with minimal natural ram-air cooling. This scenario requires a cooling system that relies entirely on pulling air via the mechanical fan. A thicker 3-row or 4-row radiator with a core depth of at least 2.0 to 3.1 inches is required. These radiators have a taller, narrower footprint (typically 27.5 x 20.5 inches) to match the vertical engine bay configuration of earthmoving machinery, allowing the hydraulic oil cooler to mount cleanly in front of or behind the radiator assembly.

Utility Tractors and Agricultural Work

Case IH utility tractors require radiators that can handle long, uninterrupted hot-weather operations during tillage or harvesting. Looking ahead to 2026, heavy equipment operators are increasingly shifting toward all-aluminum replacements to phase out older, heavier copper-brass designs. While copper-brass is highly repairable, vacuum-brazed aluminum radiators offer up to 40% better heat transfer efficiency and are significantly lighter, reducing structural stress on the front tractor frame over bumpy terrain.

Common Sizing Mistakes

Avoiding these common pitfalls during the selection process will save you time, return shipping costs, and unnecessary downtime on the job site:

• Confusing Core Dimensions with Overall Dimensions: Many replacement listings highlight the overall package dimensions (such as 73x61x19 cm) rather than the core dimensions. If you purchase based on overall dimensions thinking they represent the core, the radiator will be far too small for your machine’s mounting brackets.
• Ignoring Shroud and Oil Cooler Mounts: Many Case machines feature an integrated hydraulic oil cooler that bolts directly to the radiator frame. Ensure your replacement radiator has the correct pre-drilled brackets and threaded inserts to accept your existing oil cooler and fan shroud.
• Mismatched Hose Angles: Even if a radiator matches your core dimensions, some aftermarket manufacturers alter the angle of the inlet or outlet pipes. A straight pipe instead of a 45-degree elbow can force your radiator hose against the engine block, resulting in premature wear and hose failure.
• Over-specifying Row Count: While a 4-row radiator sounds superior to a 3-row radiator, the increased thickness restricts airflow if your mechanical fan shroud is worn or if your fan clutch is slipping. Ensure your engine’s fan is capable of drawing air through a thicker core before upgrading.

FAQ

Can I use an aluminum radiator instead of the original copper-brass in my Case skid steer?

Yes, modern vacuum-brazed aluminum radiators are excellent upgrades for older Case machinery. They are lighter, offer higher heat transfer rates, and resist vibration cracking better than traditional soldered copper-brass units. Ensure you use the correct organic acid technology (OAT) coolant to prevent internal corrosion in aluminum systems.

What is the difference between a 3-row and a 4-row radiator for Case machinery?

The row count refers to the number of vertical tube layers running through the radiator core. A 3-row radiator typically has a core thickness of about 2.0 to 2.2 inches and is ideal for standard utility work. A 4-row radiator has a thickness of 2.75 to 3.1 inches, providing extra cooling capacity for severe-duty applications, though it requires a high-output fan to pull air through the denser core.

How do I know if my Case radiator is failing or just needs cleaning?

If your machine is overheating, first blow out the cooling fins with compressed air or a pressure washer to remove packed dirt and organic debris. If the engine still runs hot and you notice cool spots across the radiator core surface while using an infrared thermometer, this indicates blocked internal tubes, requiring a complete radiator replacement.

Will a Case 1845C radiator fit a Case 1840 skid steer?

Yes, in most cases. The Case 1840 and 1845C models share the same engine bay platform and use the same OEM part numbers (including 1347609C1 and 1A12192). However, always double-check the mounting bracket hole alignment on aftermarket radiators, as minor differences can occur between manufacturing runs.