ZE550EK-10-1156 | Built 2021 | 719 hrs | Parked in Weinan — Extended boom + Aidi 135 hydraulic breaker

Overview

• Model: Zoomlion ZE550EK‑10‑1156
• Manufacture year: 2021
• Hours: 719 hrs (low–moderate)
• Location: Weinan, Shaanxi, China
• Configuration: Extended/long‑reach boom and Aidi 135 hydraulic breaker

Key concerns and inspection focus

• Extended boom effects: The longer boom changes load distribution and stability and increases fatigue risk at joints. Inspect connection points, reinforcement plates, welds and any modifications.
• Breaker impacts: Breaker work transmits high shock loads to the carrier. Check breaker body, tool bit wear, bushings/seals, hoses and the mounting bracket.
• Hours vs duty: 719 hrs is not high overall, but if most hours are breaker work, local wear (pins, bushings, hydraulics, boom) can be accelerated. Confirm duty cycle (breaking vs digging).
• Hydraulic matching: Verify Aidi 135 rated flow/pressure matches the machine’s auxiliary circuit. Mismatches cause poor performance or pump overload.
• Stability and counterweight: Extended boom plus breaker shifts center of gravity forward — confirm counterweight or ballast adjustments and machine stability under load.