Replacing Pistons/O-Rings
If you use your nailer day in and day out, Grizzly offers repair pistons as cheap insurance against wasted down time and lost profits in the event that a piston or pis- ton shaft becomes worn out. To replace a piston:
Always disconnect air from nailer whenever servicing! During mainte- nance, a nailer connected to air may fire accidentally, causing serious personal injury!
1.Disconnect the nailer from the air supply!
2.Remove all nails from the magazine cartridge.
3.Remove the 4 cap screws on the back of the nailer, near the exhaust port.
4.Remove the rear cap as shown in Figure 7.
5.The top of the piston should now be visible inside the cylinder, which is housed in the back of the nailer.
Figure 7. Removing rear cap.
6.Remove the guide cover from the nose assembly by loosening the 2 cap screws.
7.Watch the nose assembly and push the top of the piston with your finger. You will see the piston shaft slide along the guide.
8.Push the piston shaft back inside the nailer until you can grip the piston head and remove it from the cylinder.
9.Place a new O-ring on the new piston and apply a thin film of the proper lubricating oil on the O-ring.
10.Insert the new piston in the cylinder. Make sure that the grooves on the piston shaft line up with those on the guide. The new piston should easily slide into the cylinder. Do not force the piston into the cylinder! If the piston is not easily inserted, double- check the alignment of the piston shaft with the grooves on the guide.
11.After the piston is inserted correctly, replace the guide cover and tighten the 2 cap screws. Replace the rear cap assembly and tighten the 4 cap screws.
12.For more assistance, or to install a complete O-ring set, refer to the appropriate breakdown diagram in the back of this manual.
H2911 18 Gauge Brad Nailer |