It is a genuine item that is supplied by the original equipment manufacturer for use Porter Cable nailers. This is an identical replacement for a missing or a worn o-ring was installed on a new unit, please make sure to refer to the appropriate diagrams of your model for the correct location and application of this hardware. The part helps to provide a tight seal between connected components. Keep in mind this high-quality o-ring is made of durable rubber and is sold individually.
Removed cylinder housing, then removed piston
Replaced piston cap (vinyl) and all O-rings; applied thin veneer of machine oil to ensure good seal, carefully re-threaded plunger shaft, spring, and piston, then tightened housing bolts
1. Remove the four bolts in the top of the head unit.
2. Replace the parts inside in the same order they came out.
3. Replace top cap.
4. You can refer to the parts diagram on eReplacementGÇÖs website for your exact model.
1. Removed hex bolts from head
2. Dissembled piston stop and compression assembly
3. Laid all components in order on work bench
4. Utilized individual parts breakdown diagram to validate component assembly
5. Removed and replaced damaged and worn parts
6. Re-assembled components in correct order
7. Ins
... Read moretalled head hex bolts
8. Oiled and tested tool
9. No air leaks
10. Tool is back in service
When head was removed I found broken plastic parts. Ultimately I ended up replacing O rings, all cylinder head valve plastic parts and the piston ring (although that was probably not really necessary). Biggest problem was the poor quality of the Porter Cable exploded parts diagram and the difficulty in identifying which parts to order.
... Read more The FN250B is now back together and works perfectly.
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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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