A Plus Electric Motor Repair, Inc. repairs and rewinds US MOTORS motors at our shop in St. Charles, Illinois. US MOTORS is a Nidec brand, best known for the vertical hollow shaft pump motors used in municipal water, wastewater, irrigation and industrial pumping. We repair US MOTORS vertical and horizontal motors up to 650 HP for customers throughout northern Illinois, northwest Indiana and southern Wisconsin.
- AC and DC motors up to 650 HP
- Rewinding, balancing and machining done in house
- EASA member shop, with a lead rewinder who has been rewinding motors since the 1970s
- Standard repairs in 7 to 10 days, rush repairs in 3 to 5 days
- One-year repair warranty
- Free pickup and delivery within 50 miles of St. Charles
US MOTORS Equipment We Repair
- Holloshaft vertical hollow shaft pump motors
- Vertical solid shaft pump motors
- Premium efficiency horizontal AC motors
- Large motors for pumps, fans and compressors
- Inverter duty motors
- Single phase and three phase motors
Our US MOTORS Repair Process
- Incoming inspection. We record the nameplate data and the motor’s condition when it arrives.
- Testing. Ground testing, surge comparison and core loss testing identify winding and core problems.
- Teardown and failure analysis. We inspect bearings, shaft, rotor, stator and housings to find the cause of failure, not just the symptom.
- Written quote. You receive a repair quote, and a replacement quote when a new US MOTORS motor or equivalent makes more sense.
- Repair. Rewinding, bearing replacement, shaft and housing machining, and brake work as required.
- Balancing and final testing before the motor is returned.
Common Reasons US MOTORS Motors Come In
- Thrust bearing failure on vertical pump motors
- Non-reverse ratchet wear and damage
- Water intrusion at well, lift and booster stations
- Winding insulation breakdown from heat, moisture or voltage spikes
- Overheating from overload or single phasing
- Vibration from misalignment or pump problems
What to Send for a Quote
A photo of the nameplate speeds up quoting. On US MOTORS motors, the model number and ID number identify the exact design, including thrust rating on vertical motors. Include horsepower, voltage and frame if the nameplate is damaged, the pump application, and how quickly you need the motor back.
Frequently Asked Questions
Do you repair vertical hollow shaft pump motors?
Yes. We repair US MOTORS vertical hollow shaft and solid shaft pump motors, including thrust bearings, non-reverse ratchets and rewinding. Our on-site team can also handle removal, installation and alignment.
Who makes US MOTORS?
US MOTORS is part of Nidec Motor Corporation. See our Nidec motor repair page for the other brands in the Nidec family.
Do you work on municipal pump motors?
Yes. We repair well pump, booster pump and lift station motors for municipalities and water districts across our service area.
Is there US MOTORS repair near me?
Our shop is in St. Charles, Illinois. Pickup and delivery are free within 50 miles, which covers most of the Chicago area and the Fox Valley. We also serve Rockford, northwest Indiana and southern Wisconsin. See our full service area.
What if a US MOTORS motor fails after hours?
Call our 24-hour emergency line at (630) 283-8433.
Related Resources
Contact
A Plus Electric Motor Repair, Inc.
3483 Swenson Ave, St. Charles, IL 60174
Office: (630) 283-3569, Monday through Friday 8:00 AM to 4:30 PM, Saturday 8:00 AM to 12:00 PM
24-hour emergency line: (630) 283-8433
Request a US MOTORS repair quote
US MOTORS, Holloshaft and Nidec are trademarks of their respective owner. A Plus Electric Motor Repair, Inc. is an independent repair facility and is not affiliated with or authorized by the manufacturer.