4176022 SEAL;OIL for Hitachi EX300LC-3/6SD1T

Hitachi original OIL SEAL is not an ordinary rubber ring but a precision control system designed for rotary motion. From material formulations to structural design, it is specifically created to address the unique challenges of 'rotation.'

Exclusive formulation, heat-resistant and anti-aging: For the high-temperature conditions of engines and rotary motors (up to over 120°C), the main lip material uses high-temperature resistant NBR or FKM (fluororubber), maintaining excellent elasticity even under continuous thermal aging. The special cross-sectional design ensures that during high-speed rotation, the lip forms a stable and extremely thin oil film, providing lubrication while preventing leakage.

Self-tightening spring, lasting follow-up: A high-toughness self-tightening coil spring is embedded inside the lip, providing long-lasting radial compression for the oil seal. Even if the crankshaft experiences slight wobble or wear during prolonged operation, the spring automatically compensates, ensuring the lip always closely contacts the shaft to avoid leakage channels caused by 'falling behind' the shaft movement.

Dust-proof secondary lip, double protection: In harsh construction environments, external mud and sand are the main enemies of oil seals. Hitachi original oil seals usually feature a dual-lip design with a primary and secondary lip. The secondary lip acts like a loyal guard, forming a labyrinth-like barrier between the oil seal and the external environment, effectively scraping away invading dust and mud, preventing impurities from entering the oil system, and avoiding secondary damage caused by 'abrasive wear.'

In the maintenance market, a few inexpensive generic oil seals may seem tempting, but reduced material quality, insufficient spring tension, and inaccurate lip dimensions often leave hidden risks of early failure in what should have been a thorough overhaul. Hitachi original OIL SEALS strictly follow the interference fit and lip profile designed in the original factory drawings, ensuring that every rotating shaft, from the front of the engine to the end of the travel motor, meets its design lifespan. Choosing original oil seals means ensuring that every start and rotation of your equipment maintains the zero-leak standard it had when it left the factory.

Check now for the Hitachi original oil seal kit that corresponds to your model and build the most robust leak-proof barrier for your equipment’s "power heart."