Excavator manufacturers frequently update radiator specifications across production runs of the same model. A Komatsu PC200-8 manufactured in 2010 may carry a different radiator specification than a 2015 PC200-8, even though both machines share the same model designation. Emission tier upgrades, engine revisions, and regional variants can all trigger changes in radiator dimensions, inlet/outlet positioning, or mounting bracket patterns.
This means that two machines with identical model names can require radiators with different part numbers. Ordering solely by model name without verifying the physical part number on your existing unit is one of the most common causes of incorrect replacement orders in the aftermarket.
Different manufacturers use distinct part numbering systems. Understanding these formats helps you identify and cross-reference the correct replacement.
Komatsu radiators typically follow a pattern of two to three digits, a hyphen, two digits, another hyphen, and four to six digits. For example, 20Y-03-41110 is a radiator for the PC200-8 series, while 207-03-71110 serves the PC300-7 and PC350-7. The prefix digits indicate the product group, and the suffix identifies the specific configuration.
Hitachi and ZAXIS series radiators use numeric codes such as 4479181 for the ZX70 and ZAXIS70, or 11110705 for the EC290. These numbers appear on the radiator nameplate or in the machine parts catalog.
Caterpillar radiators are identified by numbers in the format of four to seven digits, such as 4756622 for the E345GC or 508-6292 for the E320GC series.
Doosan and Daewoo radiators often carry alphanumeric codes like K9004261 for the DX180 and DX140 cooling systems.
Cross-referencing an OEM part number to an aftermarket replacement requires more than matching digits. Follow these verification steps.
Record the complete part number from the radiator nameplate, typically affixed to the tank or side panel of the radiator assembly.
Record the core face width, core face height, and core thickness in millimeters. Core thickness determines the row count and directly affects cooling capacity. A variance of 5 mm or more from the original specification indicates a different configuration.
Measure the outer diameter of each pipe, the center-to-center distance between them, and whether each pipe is located on the left, right, or center of the radiator face. A mismatch here will prevent installation even if all other dimensions are correct.
Record the bolt hole spacing, hole diameter, and bracket orientation. Many radiator installation failures result from incompatible mounting patterns rather than incorrect core dimensions.
Determine whether the original radiator includes an integrated transmission oil cooler. If your machine has a separate oil cooler mounted in front of the radiator, ensure the replacement unit accommodates this configuration.
Reputable aftermarket manufacturers maintain cross-reference databases that map OEM part numbers to their own product codes. When requesting a quote, provide the OEM part number, excavator make and model, machine serial number if available, and clear photographs of the existing radiator including nameplate and connections.
Suppliers who ask for this information rather than simply accepting a model name are following proper cross-reference procedures. If a supplier cannot provide dimensional confirmation or offers a replacement without asking for your OEM number, treat the recommendation with caution.
For detailed cross-reference data and radiator specifications across major excavator brands, consult our product catalog with full OEM part number listings.
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