Electric Motor Repairs

Overhauls and Repairs

Based in Bradford, BAWCo has provided AC motor repairs for over 100 years. We’re AEMT members and ISO 9001 accredited, so every repair meets recognised industry standards.

We assess every motor individually before any work starts, so you get a repair plan built for your motor, not a generic fix. Browse our overhauls and most common repairs below.

100+ Years Experience
in Electric Motor Repairs
Contact Us

Regular electric motor servicing identifies developing faults, covers common repairs like bearing replacement, and cleans fans and fins to improve efficiency.

Recommendations

We recommend this based on the motor quality, application, operating time and capacity.

Recommended service times based on operating capacity:
100% 1-2 Years
75% 2-3 Years
50% 3-5 Years

Overhaul Procedure

  • Dismantle the motor
  • Check all shaft housing and machined surfaces
  • Test all windings – check resistance (single-phase and 3-phase), check insulation to earth (single-phase and 3-phase), run Baker test (3-phase motors only)
  • Jet wash, dry out, varnish windings, and oven-stove
  • Replace bearings and seals
  • Assemble the motor, perform final tests, and run
Electric motor overhaul at BAWCo
AC motor servicing front view
AC motor service side view

Possible Problems

  • Overcurrent failures
  • Excessive heat
  • Unable to perform at full capacity
  • The rotor doesn’t spin when powered up
  • Unbalanced resistances or open circuit
  • Windings low to earth

Electric Motor Rewind (Single and 3-Phase)

  1. Detail and strip the windings
  2. Remove old insulation and clean the core pack
  3. Insulate slots with required heat specification (Class F and H)
  4. Wind, connect, and test
  5. Impregnate with varnish and oven-stove
  6. Assemble the motor, perform final tests, and run
AC Motor Rewind Before Pic
AC Motor Rewind Repair Pic
Electric motor repair pic

Possible Problems

  • Excessive noise
  • Excessive vibration
  • Excessive heat on the endshield or shafts
  • Rotor mechanically locked up
  • Application wear or damage due to misalignment

Bearing Housing and Surface Repairs

  1. Strip the motor down
  2. Remove the old bearings
  3. Measure the shaft and housings for wear – perform engineering work on worn surfaces to bring them back within tolerance
  4. Fit new bearings
  5. Assemble the motor, perform final tests, and run
Bearing Housing and Surface Repair
Bearing Housing and Surface Before
Repaired electric motor bearing surface

Possible Problems

  • Visual inconstancies
    • Signs of melting insulation on the leads
    • Cracking or discolouration of the leads
    • Blown lead
  • Unbalanced resistances or open circuit
  • Unbalanced resistances or open circuit

Re-lead Windings

  1. Dismantle the motor
  2. Cut the leads back to the connections
  3. Test windings in case further action is needed
  4. Connect new leads and terminate
  5. Varnish and oven-stove windings
  6. Assemble the motor, perform final tests, and run
AC Motor Re-lead Before Picture
AC Motor Re-lead Repair Picture
AC Motor Re-lead After Picture

Possible Problems

  • Loose-fitting components
  • Visual inspection
  • Measures below tolerance

Diagnostic

  1. Clock the shaft for trueness
  2. Measure to check the exact size

Example Repair Procedure

  1. Dismantle the motor
  2. Remove bearings
  3. Perform engineering work to build the shaft back up and turn it concentric
  4. Fit new bearings
  5. Assemble the motor, perform final tests, and run
Worn Shaft
Worn Drive Shaft Top View
Worn Shaft Close up

Stocked Parts

  • Endshields
  • Terminal blocks and boxes
  • Feet/ Flange mounting points
  • Cable glands
  • Cooling fans and fan cowls
  • Unbalanced resistances or open circuit

Replace and Repair

BAWCo stocks and has full access to all Brook Crompton spares for replacements. We also hold a wide range of compatible spares for other motors and can offer repair services if required.

Broken Fan Part
Electric Motor Spares in BAWCo Workshop
Broken Parts Replacement from BAWCo

Possible Problems

  • Excessive noise and vibrations
  • Poor airflow
  • Excessive heat
  • Overcurrent
  • Unbalanced resistances or open circuit

Force Vent Unit Repair

  1. Dismantle the motor
  2. Clean the fan and motor
  3. Test the windings
  4. Inspect mechanical surfaces
  5. Replace bearings
  6. Assemble the unit, perform final tests, and run
Forced Vent Unit Side View
Forced Vent Unit Front View
Forced Vent Unit Picture 3

24/7

Emergency Response

22

Full-time engineers

5 Tonne

Lifting Capacity

ISO 9001

Quality Certified

Why BAWCo?

Electric motor repair is only part of the job. Here’s what you get when you choose BAWCo.

Repair or Replace

If a repair isn’t the most economical option, we’ll advise you and offer a replacement instead. That way you can weigh up downtime and costs.

Trusted by Industry Leaders

From Yorkshire Water to Ineos, Tioxide, Kone and Solenis, businesses across the UK rely on BAWCo for their motor repairs and supply.

Collection and Delivery

We collect your motor, repair it, and deliver it back, using our own vehicles locally or trusted courier partners nationwide.

BAWCo is ISO 9001:2015 certified for quality management BAWCo is an AEMT member BAWCo is an authorised Brook Crompton repairer BAWCo is Achilles approved BAWCo is SafeContractor approved BAWCo is an ATEX-approved repairer of hazardous area motors

Frequently Asked Questions

Still have questions? Here’s what customers ask us most.

Yes, call 01274 728379 day or night. Motor failure doesn’t wait for a convenient time, so we offer emergency repairs to get your equipment back up and running as fast as possible. Contact us directly, and we’ll prioritise your repair, arrange collection, and keep you updated throughout. For critical applications, we advise keeping a spare motor on hand to minimise downtime.

Yes. If a motor is too large to move, or you need an assessment before deciding on repair or replacement, our engineers can visit your site to inspect it. We’ll check the motor, discuss the options with you, and confirm next steps, whether that’s a repair, a replacement, or further investigation.

Yes. BAWCo is an ATEX-approved repairer, verified through our AEMT profile. We repair hazardous area motors, including flameproof, non-sparking motors, and motors for dust environments, to the required safety standards for potentially explosive environments.

If an electric motor repair isn’t possible, or isn’t the most economical option, we’ll let you know and recommend a replacement instead. We can also provide an energy-saving comparison so you can see how a new motor might reduce running costs.

Request a Repair

Arrange a collection, drop off your motor, or speak to our engineers for technical advice on your electric motor repair.

Contact Us

Looking for DC Repairs?

View DC Motor Repairs