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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 felt seals protect the hinge points on the grinders brush arm. There are two felt seals on each brush arm (and two brush arms on each grinder). The seals typically produce no symptoms when they fail, which is why it is important to inspect (and replace) them whenever the grinder is disassembled and damage is discovered.
This article provides step-by-step instructions for replacing the felt seals on a DeWALT D28402 grinder. Lets get started.
REMOVING THE FELT SEAL(s) [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 felt seals.
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 first felt seal.
Remove the brush arm.
Remove the second felt seal.
INSTALLING THE NEW FELT SEAL(s) [top] 4. Install the felt seals.
Install the first new felt seal onto the brush arm post in the housing.
Install the second felt seal onto the brush arm.
Install the cap onto the brush arm (over the new 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.