1-12528007-0 BUSHING; IDLE SHAFT HD for ISUZU EX300/6SD1

Engineered to Isuzu Clearance & Alignment Specifications

The idler shaft bushing provides a low‑friction bearing surface for the idler gear, enabling smooth rotation around the stationary idler shaft while maintaining precise radial alignment. Isuzu Genuine Idler Shaft Bushings are manufactured to exact OEM inner diameter, outer diameter, wall thickness, and surface finish specifications—ensuring the proper oil film clearance and concentricity required for consistent gear mesh. This precision minimizes friction, reduces vibration, and maintains correct backlash between the idler gear and its mating gears. Aftermarket bushings often exhibit inaccurate dimensions or poor surface finish, leading to excessive play, gear noise, and accelerated wear of both the bushing and shaft.

Built for Continuous Rotation & Load Cycling

The idler shaft bushing operates under constant rotational load whenever the engine or transmission is in motion, enduring radial forces, sliding friction, and exposure to hot lubricating oil. Isuzu Genuine Idler Shaft Bushings are produced from premium bronze, sintered metal, or steel‑backed copper alloy formulations selected for their high load capacity, embeddability, and oil retention. Precision‑honed inner surfaces and strategically placed oil grooves or holes ensure consistent lubricant distribution, reducing wear and preventing seizure. This robust construction delivers reliable performance and long service life under sustained operating conditions.

Restore Idler System Precision with Genuine Assurance

A worn or non‑genuine idler shaft bushing compromises idler gear alignment, leading to excessive backlash, gear whine, uneven tooth wear, and potential damage to the idler shaft and adjacent gears. Using an incorrect bushing may also void your Isuzu powertrain warranty. By choosing an Isuzu Genuine Idler Shaft Bushing, you restore factory‑specified clearances, maintain smooth idler gear rotation, and ensure the long‑term reliability your engine or transmission was designed to deliver. Always specify genuine for timing or transmission idler system repairs.