Drill Compression Spring N078434
- Manufactured by:
- DeWALT
- ERP Number:
- ERP11929418
- Part Number:
- N078434
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Product Description
?This compression spring is for drills. The compression spring holds tension against the anvil and sleeve to keep the anvil tight on the armature. Disconnect the power before installing this part. Wear work gloves to protect your hands.
Frequently Purchased Together
?Troubleshooting
- DeWALT
- Porter Cable
- Impact Driver
Videos For installing this part.
?
Customer Part Reviews
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Customer Repair Instructions
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
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Impact driver would not hold bit tip
Charles from Kalispell, Montana
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
https://www.youtube.com/watch?v=PQ8lSB_mP1c
Impact driver wouldn\'t hold a bit anymore
Kyle from Finksburg , Maryland
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Pliers, Screw drivers
Remove washer spring cap and ball
Put new parts in and reassemble
Be careful the hog ring is hard to get on
Start on one side and work it around your job is done
If your impact driver does not hold a bit replace the spring behind cap.
Which holds the ball, shoul ... Read more d fix your drill
Impact wasnt holding the bit in place
Nick from Rumney , New Hampshire
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
The impact wouldn\'t hold bits anymore they would fall out
Ernie from Hazel , Kentucky
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
The spring that kept tension on the ball bearing broke.
Larry from Ball , Louisiana
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- N078434
2. Removed housing
3. Removed broken spring and replaced with new spring, making sure ball bearing was in correct place.
4. Replaced housing, spring, washer and clip.
Driver bit wold not hold in chuck
rick from auburndale, Florida
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers
https://www.youtube.com/watch?v=PQ8lSB_mP1c
Broken bit in chuck
Ray from Wrightwood, California
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
2. Upon receiving the parts, I reassembled the chuck , but it did not work properly.
3. I then disassembled the ch ... Read more uck again carefully gripping the compression ring, spring and ball.
4. I then reassembled the chuck placing the steel ball above the retention spring in the slot on the shaft rather than below the spring in the slot.
5. The chuck worked as designed after the second reassembly.
NOTE: I think that the video instruction you nicely provided should also include:
1. A warning that once the compression ring is released that the chuck and related parts are under pressure and should be held firmly so as not to lose any parts.
2. A note that indicates that the steel ball is to be placed above the ball retention spring rather than below the ball retention spring.
3. The second spring ( the ball retention spring ) should be named just that .
Thanks again for the ease of ordering parts on your website and the excellent video\'s that make repairs less daunting to the average DIY\'er
broken spring that holds the steel ball
Don from Elma, Washington
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
https://www.youtube.com/watch?v=PQ8lSB_mP1c
Bit kept falling out
Brian from Indiana , Pennsylvania
Bit holder worn
Lyle from Morning Sun , Iowa
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
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