E307 Excavator Front Idler Assy for Caterpillar 7-Ton Models

The E307 Idler Assy is a critical wear part in the undercarriage of Komatsu E307 series excavators, designed to support the track chain, maintain proper track tension, and enable smooth, continuous movement of the tracks during excavation operations. As a core component of the "four-wheel-one-belt" undercarriage assembly (track links, rollers, idlers, and sprockets), the idler assy helps distribute the excavator’s weight evenly across the tracks, reducing stress on individual parts and preventing excessive wear.

Our production involves rigorous quality-controlled processes:

• High-grade Material Selection: Components are crafted from premium materials for maximum durability
• Outer Race/Shell: High-carbon chromium bearing steel (SUJ2) for superior hardness and wear resistance
• Inner Roller/Spindle: Alloy steel (SCM440) engineered to withstand significant radial and axial loads
• Seals & Lubrication: Nitrile rubber (NBR) seals for oil resistance with lithium-based grease for long-term lubrication
• Quality Assurance: All materials undergo thorough inspection for chemical composition and mechanical properties using spectrometers and hardness testers