Brands / US MOTORS
US MOTORS Motor Repair
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.
& sell
- Service
- Repair, rewind, replace
- Standard
- 7–10 days
- Rush
- 3–5 days
- After hours
- (630) 283-8433
Free within 50 miles · Calls our office
US MOTORS Equipment We Repair
What to send us
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.
Schedule a Free PickupCall (630) 283-3569Request a Quote OnlineWhy plants send their US MOTORS work to A Plus
We come get it
Free pickup and delivery within 50 miles of our St. Charles shop, with pickup or freight from farther out.
Nothing gets sent out
Winding, testing, dynamic balancing and machining all happen in our own shop. We rewind with Grade H magnet wire and Elantas varnish, a step above what most shops use.
7–10 days, or 3–5 rush
Time-critical jobs are worked through nights and weekends when a line is down.
EASA member shop
EASA, the Electrical Apparatus Service Association, is the international trade association for motor repair shops. Members get its engineering support, technical data and recommended repair practices.
One year, every repair
And when replacing is faster, same-day delivery on new 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
Need a new US MOTORS unit instead?
We sell new and surplus motors, gearboxes and drives too. Call with the nameplate and we will quote a matched replacement alongside the repair, so you can compare and decide.
Straight answers on US MOTORS
Q1What do you need to quote a vertical hollow shaft motor?
The model and ID number from the nameplate, horsepower, voltage, RPM, thrust rating and whether it has a non-reverse ratchet. Tell us the pump application and how fast you need it back.
Q2Why did the thrust bearing fail?
Common causes are upthrust at startup, pump problems, misalignment, wrong lubrication and water getting in. We check the bearing and the rest of the motor at teardown and tell you what we found.
Q3Can you pull the motor out and put it back in?
Yes. We can come out, uninstall the motor, and reinstall it once it is repaired, including alignment and drive setup, so your maintenance crew can stay on everything else.
Q4Is a rewound motor as good as a new one?
In a lot of cases it is better. We rewind with Grade H magnet wire, a higher temperature rating than most shops use, and seal the windings with Elantas varnish. Plenty of our motors leave the shop in better shape than when they left the factory.
Other brands we repair & sell
US MOTORS unit down?
Office: Monday through Friday 8:00 AM to 4:30 PM, Saturday 8:00 AM to 12:00 PM. Emergency line answered 24/7.
A Plus Electric Motor Repair, Inc., 3483 Swenson Ave, St. Charles, IL 60174. 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.