The o-ring fits inside the valve piston. This part is available individually and is made of rubber. It is a genuine OEM sourced part which is specially designed for use with Porter Cable nailers and staplers. A screwdriver and an allen wrench may be helpful when replacing this part. It will require replacing if it becomes broken.
Troubleshooting
This part works with the following brands:
Porter Cable
This part works with the following products:
Nailer
Part# 886555 replaces these:
886555,
Questions & Answers
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This nailer is about 17 years old and has seen a lot of use. The last time I used it is work for a couple of trigger pulls and then began leading air through the top vent and stopped driving. I did some research on the repair and then went to the manufactures web site, but they no longer carried any parts. All the parts I needed I got fro
... Read morem eReplacment parts.
Disassembly was fairly simple. The piston was stubborn to remove but a sharp rap on a wooden block did the trick. Checked all the parts for damage and found that the spring bumper was broken in several places. Ordered that part and replaced all the seals since the unit was apart. Recommend lubricating each seal and its mating part before reassembly. A good cleaning of the tool is also recommended along with oiling other areas with moving parts. Works great. Recommend about 80-85 psi when operating brad and finish nailers.
Removed the four allen head screws from the cylinder cap and removed it
Removed the cylinder and cleaned the inside of the gun
Installed all of the o-rings, piston stop and gasket
Oiled the insides of the gun
Replaced the cylinder cap
Disassembled the trigger and then removed the trigger valve from the body of the gun using a socket. I replaced all of the O-rings in the trigger area and lubricated them with the oil that comes with the gun. I then reassembled the valve and screwed it back into the gun body. I reassembled the trigger making sure that the safety worked
... Read moreas it is designed to. The gun worked properly after the repair and continues to at this point. I am satisfied that the O-rings were the cause of the problem.
1) Remove from air source
2) Unscrew four allen bolts on top of nailer
3) Remove top and internal parts that come out when top is removed. Note the order and orientation of the parts.
4) Lube and replace O rings
5) Reassemble in reverse order.
6) Evenly tighten allen screws
7) Reconnect air and ch
... Read moreeck operation at minimum air pressure prescribed on feeder
8) Get back to work
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Stock Status
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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