At Knower Network, we take pride in highlighting the motor shop services that keep industries running smoothly. With more than a century of experience, our electric motor repair shops are recognized for their precision, reliability, and adherence to industry standards.
This article is part of our Motor Shop Spotlight Series, which walks you through every step of the motor repair process—from the moment a motor arrives at our facility until it is returned in like-new condition. Here, we’ll focus on three critical stages: disassembly, electrical testing, and cleaning.
Step 1: Motor Disassembly
Every electric motor repair begins with a careful and documented disassembly process:
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Initial Condition Photos: Upon arrival, technicians photograph the motor to document its condition.
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Match-Marking Components: All removable parts are labeled and match-marked for accurate reassembly.
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Careful Disassembly: Motors are taken apart with precision to prevent further damage.
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Visual Inspection: Experienced technicians identify and document visible failure points with detailed photos.
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Bearing Analysis: Bearings are cut open and inspected for signs of improper wear or misalignment.
This meticulous process ensures that no detail is overlooked before moving to electrical diagnostics.
Step 2: Electrical Testing of Electric Motors
Once disassembly is complete, our shop performs a series of electrical motor tests in compliance with IEEE 43 and EASA AR100-2015 standards. All testing is completed with a calibrated Electrom iTIG II Winding Analyzer for accuracy and reliability.
Our testing protocol includes:
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Winding Resistance Testing – Identifies open windings, shorts to ground, incorrect wire gauge, resistive connections, and other wiring issues.
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Insulation Resistance (IR) / Megger Testing – Evaluates the motor’s insulation health.
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Hipot Testing – Detects electrical leakage based on the motor’s design run voltage.
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Dielectric Absorption Ratio (DAR) Testing – Measures insulation resistance trends over time.
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Surge Testing (Line-Line & Pulse-Pulse) – Detects weak turn-to-turn insulation across uniform and non-uniform windings.
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Partial Discharge/Inception Voltage Testing – Provides early warning of potential insulation breakdown.
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Polarization Index (PI) Testing – (Optional) An extended insulation test to assess long-term reliability.
These advanced motor testing procedures help detect issues before they escalate, ensuring motors are safe, efficient, and ready for continued service.
Step 3: Industrial Motor Cleaning
After electrical testing, every motor undergoes a thorough cleaning process to prepare for detailed inspection and repair:
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Part Cleaning & Staging – All disassembled parts are cleaned and staged for further inspection.
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Rust Inhibitor Pre-Treatment – Mechanical parts are treated during the wash cycle to prevent corrosion.
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Rotor & Stator Cleaning – Both components are baked at 325°F to eliminate moisture and contaminants.
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Job Number Tagging – Every part is labeled with a unique job number for traceability and organization.
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Post-Wash Inspection Prep – Cleaned components are stored in a controlled holding area until the final inspection.
This process ensures that all motor components are free from debris, moisture, and contaminants—setting the stage for mechanical inspection and reassembly.
Why Choose Our Motor Shop Services?
By combining expert disassembly, precise electrical testing, and thorough industrial cleaning, our motor repair shops deliver unmatched quality and reliability. Whether you’re maintaining critical industrial motors or restoring aging equipment, our process ensures that your motor is returned in peak condition.
Stay tuned for the next installment in our Motor Shop Spotlight Series, where we’ll dive deeper into mechanical inspection and repair procedures.
