Easy
15-30 minutes
This is a genuine item that is supplied by the original equipment manufacturer for use with Porter Cable nailers. It provides a high-quality replacement for a worn or a missing seal that was installed on a new unit. To ensure the exact location and the correct installation, refer to the diagrams of your model. Keep in mind, this part is made of durable rubber material and is sold as an individual component. You will need an Allen wrench to remove and reattach the head cap in order to perform this repair.
Seal 904750
OEM part for: Porter Cable
Part Number: 904750
$20.01
In Stock
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Frequently Purchased Together ?
Compatibility
This part will fit the following 2 machines
Porter Cable
DA250B 15 Gauge Angle Nailer View Diagrams & Manuals
DA250B (Type 1) Finish Nailer Power Tool View Diagrams & Manuals
This item works with the following types of products:
- Nailer Parts
Customer Part Reviews ?
Average Rating (out of 5):
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correct part
correct part fit perfectly, tool was working perfectly after installation
Guy -
April 3, 2023
Verified Purchase
Right part.
Part was correct and fixed the problem.
Guest -
January 14, 2020
Verified Purchase
Easy and fast
Parts fit correctly and my trim nailer was working again in just a few minutes.
Guest -
November 29, 2019
Verified Purchase
Easy repair
Perfect part identical to original part
Guest -
November 15, 2019
Verified Purchase
Just what my finish nailer needed
Part arrived quickly and was perfect fit
Guest -
October 25, 2019
Verified Purchase
replacement part for like new repair
great hard to find part, works good, good quality.
Guest -
October 20, 2019
Verified Purchase
High
Yup
Guest -
November 24, 2022
Verified Purchase
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t days ago
Verified Purchase
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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.
Worn seals and o-rings
ronald - December 22, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen wrench
Removed the four screws from the top cover
Removed and replaced the worn parts listed
Cleaned the inside of the gun and oiled it
Screwed the top cover back on
Tested it, works like new
Removed and replaced the worn parts listed
Cleaned the inside of the gun and oiled it
Screwed the top cover back on
Tested it, works like new
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Finish nailer wouldn't nail
Cary - May 7, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, allen wrench
Parts Used
I removed the end cap of the nail gun, then noticed that the seal was broken. I clean all of the pieces out of the gun , clean the inside , then I oiled the inside of the nail gun and installed the new seal.
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Air blowing out of top of nail gun
Steve - May 16, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen Wrench
Parts Used
Changed out seal and o-ring. Easy and for $38 nailer works better then ever and saved the price of a new gun
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Compressed air was blowing through the top
Vincent - April 26, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
, Allen wrenches
Parts Used
1. Pull the top of the cylinder off.
2. Removed old collar and seal.
3. Replaced with new collar and seal.
4. Replaced top of head.
5. Test fired.
6. Went to work
2. Removed old collar and seal.
3. Replaced with new collar and seal.
4. Replaced top of head.
5. Test fired.
6. Went to work
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Leaking air, would not work
Louis - June 16, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Wrench Set, Nutdriver, Mallet
1. Took tool apart, full of dirt.
2. Found problem, broken seal, and collar causing nail gun to leak air and not work.
3. Clean entire nail gun, replace broken seal and collar.
4. Lubricated the inside of nail gun and put it together.
5. Put a protective cover on air disconnect to keep dirt out when not in use.
6. Suggested to a user, lubricate with a few drops of oil for nail guns and put the protective cover on when not in use.
7. Gun fires well.
2. Found problem, broken seal, and collar causing nail gun to leak air and not work.
3. Clean entire nail gun, replace broken seal and collar.
4. Lubricated the inside of nail gun and put it together.
5. Put a protective cover on air disconnect to keep dirt out when not in use.
6. Suggested to a user, lubricate with a few drops of oil for nail guns and put the protective cover on when not in use.
7. Gun fires well.
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Air leak. Nailer inoperative
Timothy - November 20, 2022
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed back of gun
Removed broken seal and o-ring
Cleaned all debris
Oiled parts and sealing surface
Installed new parts
Placed back on
Test fired nailgun
Success
Removed broken seal and o-ring
Cleaned all debris
Oiled parts and sealing surface
Installed new parts
Placed back on
Test fired nailgun
Success
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Air bypassing out top vent
Jonathan - February 22, 2022
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers, Allen wrench
Parts Used
1. Remove 4 Allen screws holding top housing.
2. Used needle nose pliers to pull out scattered pieces of old seal.
3. Lubed new seal with air tool oil, inserted it in place.
4. Replaced top housing, tightened Allen screws, gun was as good as new.
2. Used needle nose pliers to pull out scattered pieces of old seal.
3. Lubed new seal with air tool oil, inserted it in place.
4. Replaced top housing, tightened Allen screws, gun was as good as new.
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Would not build up pressure. Air just leaked out of the discharge port.
Larry - September 2, 2021
Tool Type
Nailer
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set
Parts Used
1. Removed discharge cover.
2. Removed 4 Allen head screws
3. Removed top of air chamber.
4. Cleaned out the pieces of seal.
5. Wiped the barrel with Vaseline to make seal slide in without marking it.
6. Put the air chamber back on and 4 screws.
7. Replaced the discharge cover.
2. Removed 4 Allen head screws
3. Removed top of air chamber.
4. Cleaned out the pieces of seal.
5. Wiped the barrel with Vaseline to make seal slide in without marking it.
6. Put the air chamber back on and 4 screws.
7. Replaced the discharge cover.
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air Venting out top of gun
JASON - April 23, 2020
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
took top of gun off and after cleaning out bad seal, replaced it and one o ring.
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Air leak
Randall - December 19, 2018
Removed top cap. Removed piston and cylinder. Replaced o-rings and seals.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
