Why Read This Article?
Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
Article Breakdown
Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
Tools & Materials
If broken parts and faulty starts are grinding on your nerves, it's time to face the fix. Whether you are a grinding pro or seasonal grinder, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you.
The brush arm is a hinged plastic component that holds the brush against the armature. It also contains an indent that allows the brush spring to engage it from the top. The most common cause of brush arm failure is melting, which can occur when the grinder is overloaded. Fortunately, replacing the brush arm on a DeWALT D28402 angle grinder is easy to do, especially when you follow our step-by-step instructions. Lets get started.
REMOVING THE BRUSH ARM [top] 1. Remove the top half of the handle assembly.
Remove the (5) retaining screws.
Remove the top half of the handle assembly.
2. Separate the handle from the field case.
Remove the paddle assembly.
Remove the lock-on button assembly.
Separate the handle from the field case.
3. Remove the brush arm.
Use long-nosed pliers to remove the brush wire from the terminal.
Use long-nosed pliers to lift the brush spring away from the brush arm.
Lift (rotate) the brush arm assembly to access the brush.
Remove the brush from the arm assembly.
Remove the brush arm retaining screw.
Remove the brush arm cap.
Remove the felt seal.
Remove the brush arm.
INSTALLING THE NEW BRUSH ARM [top] 4. Install the brush arm.
Install the felt seal onto the new brush arm.
Install the cap onto the brush arm (over the felt seal).
Slide the brush arm assembly onto the post.
Secure the brush arm with the screw.
REASSEMBLING THE UNIT [top] 5. Reinstall the brush.
Insert the brush lead (wire) through the opening in the brush arm.
Seat the brush into the brush arm assembly.
Lower (rotate) the brush arm assembly into position above the armature.
Reinstall the brush wire.
Use needle-nosed pliers to re-engage the brush spring.
6. Reconnect the handle assembly to the field case.
Partially connect the lower half of the handle assembly to the field case.
Tuck the wires into the designated slots and channels on the assembly.
Connect the lower half of the handle to the field case (manipulate the two components until they snap into place).
7. Reinstall the lock-on button.
One side of the lock-on button contains a small tab. This tab should be installed facing the armature.
Install the lock-on button into the handle.
8. Reinstall the paddle assembly.
Install the paddle assembly into the handle; ensure that the tail is positioned above the switch button, and the fulcrum is seated within the recess in the handle.
9. Reinstall the top half of the handle assembly.
Partially install the top half of the handle assembly.
Align the posts (on the fulcrum and the lock-on button) with the recesses in the top of the handle.
Before securing the handle with the screws, test the paddle and the lock-on button for proper functionality.
Secure the handle with the screws.
You can't place a value on a job well done, unless you did it yourself. (Which you did.) Now you can place that value back into your own pocket. (Or into your business.) Not only did you refine your grinder at a fraction of the cost of replacement; you have expanded your skills far beyond the daily grind.