DeWalt DW920 Motor Replacement

Written By: Stephen Rada
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DeWalt DW920 Motor Replacement

Difficulty

Moderate

Steps

9

Time Required

15 - 25 minutes

Introduction

The DeWalt DW920 Motor Replacement is a simple and effective way to replace your damaged motor in the DeWalt DW920, which is a power tool used as a drill. This repair may be needed after years of a motor being used, and may be worn out or damaged. Replacing the motor will not only make it feel like a brand new device, it will give you years of use with a new motor. Special skills are not required for this and instructions to build are in the steps section.

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    • Use a Phillips #2 screwdriver to remove the four screws to open up the case.

    • Ensure that the drill is unplugged and remove the battery to avoid electrical shock or accidental activation.

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    • Remove the outer housing to reveal the screws that are used to connect the outer covering of the drill.

    • Use a Phillips #2 screwdriver to remove all the screws that join the two parts of the casing.

    • Take the two halves of the housing and carefully pry them apart.

    • Make sure not to touch any parts in the interior of the screwdriver.

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    • Find and replace the old trigger. The trigger assembly should be found inside the drill.

    • The trigger is the component affixed to the motor and the wires. Loosen the wiring of the trigger carefully so that you can separate the connections of the terminals.

    • Remove the wires. Then take a picture so that you can remember how they should be connected. Pull the old trigger out from its engagement with the housing.

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    • Install the new trigger. Place the new trigger in the position within the housing where the old trigger originated from.

    • Solder the wires together by placing the terminal in the connector.

    • Check the wire connections with the help of the photo which was taken earlier, if it is necessary.

    • Make sure the trigger is locked tightly in its position.

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    • To reassemble the drill align the two halves of the housing back in their original positions, making sure that the internal parts, and in particular the trigger, are correctly positioned.

    • Put the screws back into their respective holes and fasten them with the Phillips #2 screwdriver.

    • Screw the nuts at an angle to make sure it will tightening uniformly.

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    • Test the trigger either by connecting the battery again or plugging the drill back in.

    • Pull the trigger to make the drill glide and to engage the rig. If it will not operate correctly, retract and examine its wiring and the position of the trigger.

    • If you meet any problems or have troubles with the trigger, don’t force it. Go back to the previous steps.

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    • Gently lift the motor and trigger mechanism out from the frame of the drill.

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    • Locate where the motor assembly is attached to the trigger mechanism and carefully detach the wires at their solder points.

    • Mark where the two cables was connected using a masking tape or similar.

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    • Solder the new motor assembly wires to the trigger mechanism in the same fashion that the old motor was.

    • Remember to check the markers from the step before and solder the cables on the right place.

Conclusion
  • Follow the case replacement guide for how to replace the case on the drill.
  • The trigger replacement guide is located above.
  • To reassemble the device, follow the instructions in reverse.

Author

Stephen Rada

Member since: 11/03/16

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