A motor protector that trips as soon as an ironworker starts is more than a nuisance. It stops production, points to an electrical fault, and can hide a second issue in the control or hydraulic circuit. This service call on an Edwards Ironworker started with a tripping motor protector and ended with a confirmed motor replacement, corrected wiring, sensor fault finding, and a successful test run.

When the Haco Kingsland Multi 175 ironworker suddenly stopped working, the initial suspicion fell on electrical faults. After tracing all electrical signals and confirming they were functioning correctly, the problem shifted to the hydraulic system. This post walks through the detailed process of diagnosing and repairing this complex machine, highlighting key steps and practical solutions that brought it back to life.