A D.C. motor maintenance schedule is a preventative and corrective maintenance schedule that covers inspections, cleaning, testing, replacement and lubrication tasks that are necessary to ensure the proper operation of D.C. motors and associated equipment. A maintenance program is fairly easy to develop and implement. Once regular maintenance checks are incorporated into a shop work schedule, they soon become transparent yet will reap cost-savings well beyond the investment in time and materials spent in maintaining them.

A D.C. motor maintenance begins with reviewing a motor service history. This review may reveal on-going problems that are both integral to the motor itself as well as external conditions (e.g., overloads, unbalances, misapplications) that are adversely affecting the motor normal operating condition. After a service history review, a visual inspection should be performed to identify any obvious wear, blockages to cooling fans, or environmental contamination (moisture or corrosion).

This inspection should also be conducted after the motor has been disassembled to discover evidence of failed components, such as burnt windings, broken leads, etc. Next, the motor windings should be tested. For most maintenance shops, this is a ground insulation test. Since the commutator and brush assembly are high-wear parts of a D.C. motor, extra time should be spent on inspecting, repairing or replacing these vital components. Finally, an inspection of the bearings should be performed; worn out or noisy bearings require replacement. In the event that sealed, non-lube bearings are not used, the motor should be lubricated and then reassembled. An operational test should be performed prior to the motor being shipped out of the repair shop.

Following are some of our Projects of repairing and maintenance services.

1. Repairs to 2900 KW Toshiba Make D.C. Motor Armature of Shree Precoated Steel Ltd. Sanaswadi, Pune.

2. Repairing of 3500 KW DC Motors Yoke of R.L. Steel Aurangabad.