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AC & DC Traction Motor Repairs & Overhauls

Houghton International offers a wide range of AC and DC traction motor repair and overhaul services. Our start-to-end service produces the entire selection of original motors to the original equipment manufacturer's (OEM) specification, under licence if required, with options to provide life-cycle or in-warranty service and maintenance.


Upon contract award, Houghton International’s engineering team would carry out a full specification clause by clause review and highlight any areas in which improvement could be made.

For existing traction motor overhauls we have found that the specifications provided do not always cover as many checks or tests as we would suggest. One particular specification for DC motor repairs calls for 58 individual checks and tests to be carried out. In practice, we actually carry out 153 individual checks and tests to that particular traction motor demonstrating our commitment to providing more than a standard overhaul as standard.

A standard traction motor overhaul specification includes –

  • Receipt of motor into works
  • Dismantle and inspect
  • Remove old bearings
  • Datum all component parts to specification
  • Carry out static tests to field and armature windings against specification requirements
  • Steam clean and stove all windings
  • Carry out Non-Destructive Testing (NDT) / Magnetic Particle Inspection (MPI) checks where required by specification
  • Clean and paint all component parts
  • Replace / repair all faulty components
  • Supply and fit new bearings
  • Assemble motor
  • Test run motor
  • Paint motor
  • Quality assurance check prior to dispatch

Experienced in both long-term volume overhaul contacts and one-off casualty repairs, we utilise our well established supply chain, fully equipped rail facility and multi skilled staff to mobilise effectively and deliver in line with customer requirements.

We have serviced and repaired over 5,000 individual rail traction motors, ranging from G310s to EE507s, high speed train (HST) motors and both Brush and GEC type, in addition to a broad range of other AC traction motors.

Specialising in the maintenance of both new and aging assets, we also work with OEMs to support the introduction of new vehicles into the market, providing troubleshooting, installation support, in situ condition monitoring and ongoing maintenance across the network.

In addition to DC motor repairs, Houghton International provides a range of other electro mechanical services including pump repairs and electric motor rewind services. Contact us today to find out more.

Further Information

About Houghton International – brochure download

Related Services

AC & DC Traction Motor Rewind Services
AC & DC Traction Motors Testing & Diagnosis Services
Services for new AC & DC Traction Motors

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Contact us for more about our AC and DC traction motors overhaul and repair services

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