When sourcing, prioritize the hydraulic system performance, specifically the main pump flow rate and pressure, as these determine the smoothness of multi-function operations. Inspect the undercarriage components, including track wear and tensioner health; rubber tracks are ideal for finished surfaces, while steel tracks are better for rocky terrain. Ensure the unit features Hitachi’s HIOS hydraulic system for fuel efficiency. Additionally, check for reinforced booms and arms with high-quality bushings to minimize 'play' or wobbling during long-term operation. For used equipment, request a certified hour meter reading and a comprehensive engine compression test report.