The Steering Knuckle Arm (OEM Part No. HD90009410114) is a structural spare part designed to transmit steering force within compatible steering systems. Manufactured from durable forged steel, the knuckle arm provides a strong mechanical connection between steering and wheel-end components while supporting controlled steering movement. The HD90009410114 steering knuckle arm is designed to withstand mechanical loads, vibration, and demanding operating conditions found in mining and heavy-duty equipment. It is suitable for maintenance, repair, and replacement applications involving worn or damaged steering components. This aftermarket replacement steering knuckle arm provides a practical solution for restoring steering force transmission, maintaining proper steering alignment, and supporting reliable vehicle and equipment operation.