CATERPILLAR 138-9378 Shaft-Track Idler 1389378

Caterpillar 138-9378 Shaft Track Idler – OEM-Grade Durability for D9R Track-Type Tractors

The Caterpillar 138-9378 Shaft Track Idler is a critical drivetrain component engineered for optimal performance and longevity in heavy-duty applications, specifically designed for 7TL-D9R and 8BL-D9R track-type tractors. Manufactured with precision metallurgy, this idler shaft features robust dimensions tailored to withstand extreme load conditions and harsh mining or construction environments. Its high-strength steel construction ensures superior resistance to wear and fatigue, maintaining track tension and alignment for enhanced machine stability and operational efficiency.

Technically, the 138-9378 idler shaft integrates seamlessly into the track assembly, providing smooth rotation and reducing drivetrain stress. Its precision-machined surfaces and hardened bearing seats contribute to reduced friction and extended service intervals. This OEM-grade replacement part guarantees compatibility and performance equivalent to original Caterpillar specifications, ensuring your D9R tractor maintains peak productivity with minimized downtime. Ideal for heavy equipment maintenance, this shaft track idler supports reliable track engagement and improved traction under demanding operational loads.

🔗 For genuine Caterpillar 138-9378 Shaft Track Idler and detailed specifications, visit Caterpillar 138-9378 Shaft Track Idler at AllParts Expert.