Grizzly T20644 instruction manual Replacing Pistons O-Rings, To replace a piston

Replacing Pistons/

O-Rings

Repair pistons are cheap insurance in the event that a piston or piston shaft becomes worn out.

The part number for the repair piston for this nailer is #PT20644098. To order, call Customer Service at (800) 527-4777.

Always disconnect air from nailer whenever servicing! During mainte- nance, a nailer connected to air may fire accidentally, causing serious personal injury!

To replace a piston:

1.DISCONNECT NAILER FROM THE AIR SUPPLY!

2.Remove all nails from the magazine.

3.Remove the four cap screws on the top of the nailer, near the exhaust port.

4.Remove the top cap.

5.The top of the piston should now be visible inside the cylinder, which is housed in the head of the nailer.

6.Open the magazine.

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.With a long flathead screwdriver or sim- ilarly shaped tool, push the piston shaft back inside the nailer until you can grip the piston head and remove it from the cylinder. (Be careful not to scratch the discharge area when pushing the pis- ton shaft with the screwdriver.)

9.Place a new O-ring on the new piston and apply a thin film of the nailer lubri- cating oil on the O-ring.

10.Insert the new piston in the cylinder. Make sure that the grooves on the pis- ton shaft line up with those on the guide at the bottom of the cylinder. The new piston should easily slide into the cyl- inder. 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, close the magazine. Replace the top cap assembly and tighten the four cap screws.

12.For more assistance, or to install a complete O-ring set, refer to Parts Breakdown on Page 16.

T20644 34° Angle Finish Nailer–2½" -13-