Difficulty

Moderate

Steps

22

Time Required

Suggest a time??

Sections

3

  • Dewalt Nailer Battery Safety Precaution
  • 1 step
  • Dewalt Nailer DCN21PL 2018 Opening Procedure
  • 16 steps
  • Main Electronics
  • 5 steps

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  • BackDewalt Nailers DCN21PL (2018)

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Introduction

What you need

Step 1

              Remove the battery
  • Before you begin the repair, remove the battery from the device.

Before you begin the repair, remove the battery from the device.

1024

Step 2

              Remove casing screws
  • Use a T10 driver to remove the four screws securing the bottom half of the casing.
  • Remove the four T10 screws securing the top half of the casing.

Use a T10 driver to remove the four screws securing the bottom half of the casing.

Remove the four T10 screws securing the top half of the casing.

Step 3

              Remove the magazine
  • Use a T10 driver to remove the screw securing the magazine to the base.

Use a T10 driver to remove the screw securing the magazine to the base.

Step 4

  • Pull the magazine down and away to unlatch and release it from the nailer.

Pull the magazine down and away to unlatch and release it from the nailer.

Step 5

              Remove framing hook
  • Use a T15 driver to remove the framing hook retaining screw.
  • Remove the hook.

Use a T15 driver to remove the framing hook retaining screw.

Remove the hook.

Step 6

              Remove hook clamp
  • This step may require a lot of force.
  • Use your two thumbs to firmly spread the metal hook clamp apart while slowly pushing it forward off the handle.
  • When this clamp is being removed, it has a tendency to launch off of the handle after you release tension.

This step may require a lot of force.

Use your two thumbs to firmly spread the metal hook clamp apart while slowly pushing it forward off the handle.

When this clamp is being removed, it has a tendency to launch off of the handle after you release tension.

Step 7

  • Use a sharp blade to slice the label underneath the battery mount to disconnect the two halves of the case.
  • Always cut away from you or others around you.

Use a sharp blade to slice the label underneath the battery mount to disconnect the two halves of the case.

Always cut away from you or others around you.

Step 8

  • Use a T20 driver to remove the two screws securing the two halves of the case to the front assembly.

Use a T20 driver to remove the two screws securing the two halves of the case to the front assembly.

Step 9

              Remove return system
  • Use the provided 3.5 mm hex key to remove the two return system bolts on either side of the nailer.

Use the provided 3.5 mm hex key to remove the two return system bolts on either side of the nailer.

Step 10

  • Grab the end cap and slide the return system assembly out of the back of the nailer to remove it.

Grab the end cap and slide the return system assembly out of the back of the nailer to remove it.

Step 11

  • Use a small flathead screwdriver in the gap between the two halves of the casing near the trigger to pry the two halves apart.

Use a small flathead screwdriver in the gap between the two halves of the casing near the trigger to pry the two halves apart.

Step 12

  • Use a small flathead screwdriver near the top seam to continue prying the case apart .

Use a small flathead screwdriver near the top seam to continue prying the case apart .

Step 13

              Remove right half of case
  • Once loose, lift up to remove the right half of the clamshell case.

Once loose, lift up to remove the right half of the clamshell case.

Step 14

              Remove lens cover
  • Remove the plastic lens cover.

Remove the plastic lens cover.

Step 15

              Remove board and switches
  • The two switches and four detent springs are only held in place by the plastic casing, so they may fall out when you remove the board—this is fine.
  • Grasp either side of the main circuit board and slowly pull it up and out of the slot in the casing.
  • Reassembly tip: note the correct location and orientation of the two switches and their detent springs.

The two switches and four detent springs are only held in place by the plastic casing, so they may fall out when you remove the board—this is fine.

Grasp either side of the main circuit board and slowly pull it up and out of the slot in the casing.

Reassembly tip: note the correct location and orientation of the two switches and their detent springs.

Step 16

              Remove trigger lock
  • Pull up on the trigger lock to remove.

Pull up on the trigger lock to remove.

Step 17

              Remove left half of case
  • Flip the nailer over.
  • Remove the remaining clamshell casing.

Flip the nailer over.

Remove the remaining clamshell casing.

Step 18

              Remove main electronics
  • Use wire snips to cut the small black cable tie securing the four main board wires together.

Use wire snips to cut the small black cable tie securing the four main board wires together.

Step 19

  • Pull the white plastic actuator straight up off its axle to remove.

Pull the white plastic actuator straight up off its axle to remove.

Step 20

  • Insert the point of a pick tool into the push-in connector’s inlet hole, which has the main board wire plugged into it.
  • With the pick tool still inserted, pull the red main board wire out of the push-in connector.
  • Make sure you choose the inlet that connects to the main board, not the solenoid.
  • Repeat this same process for the black wire and other push-in connector.

Insert the point of a pick tool into the push-in connector’s inlet hole, which has the main board wire plugged into it.

With the pick tool still inserted, pull the red main board wire out of the push-in connector.

Make sure you choose the inlet that connects to the main board, not the solenoid.

Repeat this same process for the black wire and other push-in connector.

Step 21

  • Use a T20 driver to remove the following screws:
  • Two 15 mm-long board retaining screws, one on either side.
  • Three 10 mm-long motor wire screws.

Use a T20 driver to remove the following screws:

Two 15 mm-long board retaining screws, one on either side.

Three 10 mm-long motor wire screws.

Step 22

  • Slide the board off its guide pin to remove.
  • Reassembly tip: make sure the actuator plunger lines up with the guide hole on the main board housing.

Slide the board off its guide pin to remove.

Reassembly tip: make sure the actuator plunger lines up with the guide hole on the main board housing.

To reassemble your device, follow these instructions in reverse order.

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Author

                    Carsten Frauenheim

Member since: 03/10/2020

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