Genuine Porter Cable replacement part, this item is sold individually. The Head Valve Seal is in stalled on top of the 904695 Cylinder. It provide a seal for the Head valve. If you air leaks in your nail gun you may consider the part number 904949 Overhaul Kit.<rb> It includes the Head Valve Seal and other internal parts to stop air leaks
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★★★★★
★★★★★
Easy repair
Arrived quickly and accurately. Quick and easy repair
Guest - July 15, 2019
Verified Purchase
★★★★★
★★★★★
Easy repair
Received the part within 3 days of order and it fixed my pneumatic trim nailer immediately. The pre-order operational question you asked ensuring that I was ordering the correct part was interesting, it was something I've never previously encountered when ordering parts, it's a great feature for customers. Thanks!
Guest - September 4, 2019
Verified Purchase
★★★★★
★★★★★
Easy repair, great part, works great!
The part worked great! The nail gun works wonderful!
Guest - September 9, 2019
Verified Purchase
★★★★★
★★★★★
right part
worked great
Guest - September 12, 2019
Verified Purchase
★★★★★
★★★★★
Quick fix on broken nail gun
I watched a you tube video and decided I can do this. So I ordered the part from ereplacementparts.com and the part showed up quickly. My repair took less than 10 minutes of my time and saved me over $75 by doing it myself.
Guest - September 24, 2019
Verified Purchase
★★★★★
★★★★★
Easy repair
The part fit perfectly and was easy to install. Have purchased many parts from this company and have been happy with each one. This company has a multitude of parts for virtually every machine or tool both new and old. It is the only company that I wish to deal with.
Guest - November 19, 2019
Verified Purchase
★★★★★
★★★★★
Gaskets
Ordered one set for a dewalt framing gun and three gaskets for two porter cable nail guns got all three working like brand new thanks for all your help
Guest - November 26, 2019
Verified Purchase
★★★★★
★★★★★
Easy repair
Up and running in 10 minutes - thanks!
Guest - November 26, 2019
Verified Purchase
★★★★★
★★★★★
Easy fix
Fixed the leak from back of gun in minutes
Martin - March 4, 2020
Verified Purchase
★★★★★
★★★★★
Easy to order and fast shipping.
The gasket was the exact replacement. Worked great.
RAY - March 4, 2020
Verified Purchase
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Unscrew the 4 Allen bolts from the top of the nail gun. The offending part, a seal, was directly under the cap and the original one had deteriorated to the point it was in pieces. I removed all the pieces, cleaned up the entire area and replaced the seal with the new one. Then it was just a matter of putting the head back on and se
... Read morecuring it with the 4 Allen bolts. Plugged it into the air hose and all was right with the world once again. Total time------maybe 15 minutes and easy as pie.
The piston stop had hardened and crumbled. I removed the top of the gun by removing the four hex screws. Then the top of the gun comes off and you can take out the piston stop. I also replaced the head valve seal because it is made out of the same kind of plastic. Pretty easy and now the gun works again.
Removed head from gun by loosening and removing 4 screws; removed old cracked and broken seal head valve; cleaned area of all debris; installed new seal head valve; replaced head on gun; tested gun on sample pieces of wood; all worked well.
Removed the cylinder cap from the top of the gun. I then noticed the broken piston stop and loose head seal. I removed all of the pieces of the broken piston stop. and replaced the head seal. Thoroughly cleaned the inside and oiled it. It fires nails like it new.
Remove the four screws from the cap. Then you will see the broken seal. Clean out all of the pieces of the seal, then if you think you have them all look again. Install the new seal. And place the the cap back on and secure with the four screws.
Remove head, located defective seal, remove the old one , then replaced it with the new seal. Check all other parts for wear. Installed head back on. No air leaks!
Removed the four screws from the top cap of the nail gun.
Removed the broken pieces of the seal and installed the new one, then oiled the internal parts. Then installed the four screws to the top cap
1. Disassembled Nailer
2. Removed debris, residue and broken parts
3. Installed new parts.
4. Applied pressurized air and tested for correct operation.
5. Test failed. Nailer drove one nail, but did not reset. All air pressure lost.
6. Disassembled Nailer again.
7. Installed parts correctly.
8.
... Read moreReassembled and retested.
9. Nailer worked properly.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP18987982
Manufacturer Part Number: 904689
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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