Master class: repairing the power cord of a drill

This article describes step by step the process of diagnosing a power cord failure and repairing it. Based on this article, you can also completely replace the power cord, choosing a new one at a length that is convenient for you. We used a hand drill Einhell 550E.

Execution of works

The point of wear is a piece of cord that goes into the drill body. This can be determined by connecting the drill to an outlet and bending-unbending the cord at the intended place, while keeping the power button pressed. If in certain positions the drill works – the reason is found.

Based on the fact that the length of the cord before the breakdown was quite large, it was decided not to change it completely, but only to shorten it by the length of the damaged section. If it was not possible to determine the place of wear, you will have to replace the cord.

Master class: repairing the power cord of a drill

We take out the cord from the socket. Unscrew the eight screws securing the case with a Phillips screwdriver.

Master class: repairing the power cord of a drill

Remove the housing cover.

Master class: repairing the power cord of a drill

Unscrew the two screws securing the plastic clamp.

Master class: repairing the power cord of a drill

We take out the power button from the seat.

Master class: repairing the power cord of a drill

We diagnose the malfunction. To do this, you can measure the resistance of each core for a break, or measure the voltage at the ends of the wire. In this work, the second option is chosen. To do this, turn on the electric drill in the network and measure the voltage on the veins of the cord. According to the readings of the device, it is clear that there is no voltage. Accordingly, the cause of the malfunction is the cord.

Master class: repairing the power cord of a drill

Note:in the absence of a multimeter, this procedure can be done using an indicator screwdriver. To do this, we connect the drill to the network. We bring the indicator to each of the contacts. We find the phase. We turn the plug in the socket. We bring the indicator to each of the contacts and again look for the phase. If the phase is not found at one of the stages, the wire is faulty.

We take out the cord from the socket. Unscrew the screws on the terminals of the power button with a screwdriver.

Master class: repairing the power cord of a drill

Master class: repairing the power cord of a drill

We bite off the cord below the identified place of wear with side cutters.

Master class: repairing the power cord of a drill

We clean the outer insulation of the cord by about 50 mm.

Master class: repairing the power cord of a drill

Master class: repairing the power cord of a drill

We clean the insulation on each of the cores by about 10 mm.

Master class: repairing the power cord of a drill

Master class: repairing the power cord of a drill

We check the serviceability of the cable. We connect the cable to the network and measure the voltage. As you can see from the readings of the device – the cable is working.

Master class: repairing the power cord of a drill

We take out the cord from the socket. Tinkering veins and applying a layer of solder on them.

Master class: repairing the power cord of a drill

Master class: repairing the power cord of a drill

We connect the cord to the power button. Phasing doesn’t matter. Clamp the wires in the terminals with a screwdriver.

Master class: repairing the power cord of a drill

Master class: repairing the power cord of a drill

We wind the electrical tape in several layers at the place of fixing the cord with a plastic clamp.

Master class: repairing the power cord of a drill

We install a rubber spout to prevent the cord from bending into its groove. We install a plastic clamp. Fixing the cord.

Master class: repairing the power cord of a drill

We install the power button in its seat. We carefully lay the wires inside the case so as not to transfer them during assembly.

Master class: repairing the power cord of a drill

Putting the body together. We put on the cover. We check the mobility of the power button and the lever for switching the direction of rotation. Fix the cover with screws.

Master class: repairing the power cord of a drill

We connect the electric drill to the network, check the serviceability.

Master class: repairing the power cord of a drill

The drill is serviceable and will still serve! And most importantly, the repair required absolutely no costs..

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