Field Indicators and a Diagnostic Checklist for Elevator Traction Motor Rewinding Decisions

Practitioner technical note from an elevator and escalator motor repair workshop (Lector Elevator Tech, Tehran). It sets out the field indicators and diagnostic test results (insulation resistance, polarization index, surge comparison, winding resistance balance) that help decide whether an elevator traction motor should stay in service, be rewound, or be replaced. Covers geared induction machines, gearless PMSM machines and hydraulic pump motors, and ends with a one-page field checklist. Summarises published practice (IEEE, IEC, EASA); not peer reviewed. Workshop: https://lectorco.com/elevator-motor-repair/