Keep your framing nailer in top working condition and save time and money with a framing nailer rebuilding kit, which includes all the parts that commonly wear out.
By the DIY experts of The Family Handyman Magazine
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How to Rebuild a Framing Nailer procedure
Photo 1: Work from the top down
Remove the four hex screws and then the cap. Then remove the entire cylinder and driver assembly.
Photo 2: Walk the ring off and on
Pry up the old O-ring. Then slide the round portion of the screwdriver under it. Circle the screwdriver around the O-ring to “walk” it off. Reverse the procedure to install the new, freshly greased ring.
Photo 3: Swap out the trigger valve
Locate the roll-pin driver tool and tap it out with a small hammer. Then pull out the valve and install the freshly greased replacement.
Nothing beats a top-quality nailer for cutting hours out of a framing project. But all that heavy-duty nailing depends on a handful of rubber O-rings. When they fail, your project grinds to a halt. You don’t have to wait a week for the shop to rebuild it. You can do the entire job yourself in about two hours and save money in the process. I’ll show you how to rebuild a Bostitch framing nailer with a master O-ring kit and a trigger valve assembly. If you have a different brand, don’t worry. The rebuild is similar for others.
Framing nailers usually fail in one of these ways: deteriorated O-rings that cause air leaks, a trigger valve that won’t fire, or a leaking cylinder seal or a worn driver bumper, which prevents the gun from making a complete stroke. A complete rebuild fixes all those problems. Buy the rebuild kit at a local service center or online. It’ll come with all the O-rings and seals. If you’ve put a lot of nails through your gun, buy new bumpers and a trigger valve at the same time. Then download the gun schematic from the manufacturer (bostitch.com, senco.com or, for Duo-Fast and Paslode brands, itwserviceparts.com).
Start the disassembly at the cylinder cap (Photo 1). Lay out the pieces on a spotlessly clean workbench in the order you removed them. Then remove the old O-rings using a blunt, straightblade screwdriver (Photo 2). Apply O-ring grease (usually included in the new kit) to the new rings, then replace the rings one at a time, matching each one to its replacement. Install the new bumpers, piston seals and piston stops and reinstall the cap. Then replace the trigger valve (Photo 3).
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Required Tools for this How to Rebuild a Framing Nailer Project
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Required Materials for this How to Rebuild a Framing Nailer Project
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here’s a list.