OEM Specification Engine Radiator Cooling Fan 7 Blades 1-13660-328-0 1136603280 6BG1 6BG1T Hitachi ZAX210 Excavator Precision Parts Describe: This OEM Specification Engine Radiator Cooling Fan is manufactured to the exact engineering standards of the original Hitachi factory part. Every fan undergoes multi-point dimensional verification, material composition testing, and dynamic spin balance calibration to ISO G6.3 — the same manufacturing tolerances demanded by tier-one OEM