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Komatsu Excavator Expansion Valve AN51515-A0490

Excavator Spare Parts
March 11, 2026
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Video Description:
Observe the step-by-step operation and see practical examples of usage. In this video, we demonstrate the Komatsu AN51515-A0490 expansion valve, showing its installation process and explaining how it regulates refrigerant flow in excavator air conditioning systems. You'll learn about its pressure reduction function, compatibility with various Komatsu models like PC45MR-3 and HD325, and see why proper expansion valve operation is crucial for maintaining optimal cab temperature and protecting your AC compressor from damage.
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