Difficulty
Moderate
Steps
26
Time Required
Suggest a time??
Sections
3
- Dewalt Nailer Battery Safety Precaution
- 1 step
- Dewalt Nailer DCN21PL 2018 Opening Procedure
- 16 steps
- Solenoid Assembly
- 9 steps
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0
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 solenoid wires
- Carefully use a pick tool to release the black and red wires from their routing guide on the nailer.
Carefully use a pick tool to release the black and red wires from their routing guide on the nailer.
Step 19
- Insert the point of a pick tool into the push-in connector’s inlet hole, which has the solenoid wire plugged into it.
- With the pick tool still inserted, pull the red solenoid wire out of the push-in connector.
- Make sure you choose the inlet that connects to the solenoid, not the main board.
- Repeat this same process for the black wire and other push-in connector.
- Fully remove both wires from the wire guide.
Insert the point of a pick tool into the push-in connector’s inlet hole, which has the solenoid wire plugged into it.
With the pick tool still inserted, pull the red solenoid wire out of the push-in connector.
Make sure you choose the inlet that connects to the solenoid, not the main board.
Repeat this same process for the black wire and other push-in connector.
Fully remove both wires from the wire guide.
Step 20
Remove wire guide
- Pull out and up on the plastic wire guide to disconnect it from its clips.
- Detach and remove the wire guide.
Pull out and up on the plastic wire guide to disconnect it from its clips.
Detach and remove the wire guide.
Step 21
Remove solenoid body
- This step may require a lot of force, as the solenoid is secured by a pressure fit.
- Pull directly back on the solenoid to remove it from the mount. You may have to “walk” the solenoid back and forth to slowly loosen it from the slots holding it in place.
This step may require a lot of force, as the solenoid is secured by a pressure fit.
Pull directly back on the solenoid to remove it from the mount. You may have to “walk” the solenoid back and forth to slowly loosen it from the slots holding it in place.
Step 22
Remove solenoid assembly components
- Remove the solenoid pin spring.
Remove the solenoid pin spring.
Step 23
- Use as small flat head screwdriver to pry the rubber washer off the retaining pin.
Use as small flat head screwdriver to pry the rubber washer off the retaining pin.
Step 24
- Remove the rubber washer from the retaining pin.
- Remove the metal washer.
Remove the rubber washer from the retaining pin.
Remove the metal washer.
Step 25
- Lay the nailer on its side with the flat side of the pin facing up. Pull the retaining pin directly up out of the slot to remove.
- Use your opposite hand to hold the main solenoid plunger to prevent it from falling.
Lay the nailer on its side with the flat side of the pin facing up. Pull the retaining pin directly up out of the slot to remove.
Use your opposite hand to hold the main solenoid plunger to prevent it from falling.
Step 26
- Remove the solenoid plunger and small solenoid washer.
Remove the solenoid plunger and small solenoid washer.
To reassemble your device, follow these instructions in reverse order.
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Author
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Carsten Frauenheim
Member since: 03/10/2020
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