Archives: Case Studies

Traction Motor Investigations & Overhauls

Traction motors are machines that convert rotational torque into a linear motion e.g electric vehicles, forklift trucks, elevators, conveyors etc.  The motors are heavy duty and able to withstand frequent high torque loads. Our customers regularly send us both AC and DC traction motors for fault investigation, repair or overall.  On this occasion an ELMO 5.5kw… Read more »

Emergency Flood Services and Pumping Equipment Repair

Flooded Underpass in the South West UK.

Mawdsleys provide emergency flood services as part of our ongoing contract for the Highways Agency Area 2.  Our pump service engineers are on call 24/7, 365 days a year providing emergency flood protection. Our contract is to maintain service, repair and react to breakdown situations concerning pumping equipment and emergency flood services throughout the network…. Read more »

ABB Drive Repair on Water Booster Pump

ABB Drive Repair

We were asked to attend a site on behalf of our client as they were having difficulty with an ABB Drive which controlled a Water Booster Pumping Station.  The ABB Drive calls the pumps to run when there is a demand for water. The site was a residential block on an army barracks which had… Read more »

Commutator Repair

A uniform and light surface skin or patina formation on the commutator indicates that the machine and brushes are working well. This film can be damaged in service resulting in a commutator with raw grooved or streaked surface, flat spots, ridges, copper dragging, burning, bar marking or patchiness. These can be caused by many conditions… Read more »

How to Re-Install a sewage pump using a single guide rail system

Mawdsleys Pump Services engineer re-installing a small single sewage pump into position using a single guide rail system. These works are undertaken on a Planned Maintenance contract for all pumps at one of our customers sites in the South West of England. This is a simple process of lifting the pump using the chain and… Read more »

DC hoist, Shunt Motor is Overhauled and Updated

DC Shunt motor before overhaul

This DC shunt motor has been returned for a scheduled overhaul and remedial works to fit thermal protection. The motor is 15 years old and has been held as a spare for the in-service DC motor which is still in operation after 25 years.  The application justifies holding a spare motor due to the very… Read more »

Repairs to DC Motor from Plastics Machinery

repaired dc motor for the plastics industry - Mawdsleys BER Bristol

This Mawdsley’s DC motor was originally sold to a Plastics Engineering Company in 1999, for the manufacture of Packaging materials. Its basic rating is 28.9kW at 1760rpm when supplied with 460 volts to the armature. The motor developed a fault and was sent to us for further investigation. Our Engineers found several issues needing attention,… Read more »

Supply of Replacement 4.4 KW DC Motor

4.4KW DC Motor with 460 Volt Armature

When a customer needed to replace an existing DC motor from their plastic extrusion plant in a particular frame size they contacted electrical motor specialist Mawdsleys who were able to help. The client specifically required the new motor to achieve 4.4KW. One of our stock of new DC motors had the exact mechanical configuration but… Read more »

Carbon Brush Replacement

Brush Assembly from DC Motor

We received a DC Motor in for a standard overhaul. This overhaul included Electrical Testing, Wash & Stove of the Windings, Skim & Undercut of the Commutator and Dynamic Balancing of the Armature.  We supplied and fit new Seals, Drive and Non Drive End Bearings. Following the overhaul the DC Motor was then assembled ready… Read more »


Motor Generator Set Repair

The equipment to be repaired was a 40 year old motor generator set. The unit could not be replaced because of its unusual design and complexity. A full strip and survey was carried out to find the cause of failure and recommendations made to bring the unit back to a serviceable condition. This MG set… Read more »