Model W1777 21⁄2" 16 Gauge Finish Nailer
Replacing Pistons/
O-Rings
6.Open the nose cover as if to clear a jammed nail.
Under heavy use, a piston or piston shaft may wear out. Replacement is quick and easy. Contact your authorized Shop Fox dealer to obtain the Piston Repair Kit (Part Number X1777095), or the complete
Always disconnect nailer from air whenever servicing! During main- tenance, a nailer connected to air may fire accidentally, causing seri- ous personal injury!
To replace a piston, do these steps:
1.DISCONNECT NAILER FROM THE AIR SUPPLY!
2.Remove all nails from the magazine cartridge, and clean the exterior of the nailer.
3.Remove the four cap screws on the back of the nailer, near the exhaust port.
4.Remove the cap.
5.The top of the piston should now be visible inside the cylinder, which is housed in the head of the nailer.
7.Watch the discharge area and push the top of the piston with your finger. You will see the piston shaft slide down the discharge area.
8.Taking care not to scratch or dent the nailer parts, use a wooden dowel or similarly shaped tool to push the piston shaft back inside the nailer until you can grip the piston head and remove it from the cylinder. Clean inspect the parts for cracks, wear, or burrs.
9.Place a new
10.Insert the new piston in the cylinder. Make sure that the grooves on the piston shaft line up with those on the guide at the bottom of the cylinder. The new piston should easily slide into the cylinder. DO NOT force the piston into the cylinder! If the piston is not easily inserted,
11.After the piston is inserted correctly, close the magazine. Replace the rear cap assembly and tighten the four cap screws.
12.For more assistance, or to install a complete