Grizzly H8231, H8230 owner manual Replacing Pistons/O Rings

Replacing Pistons/O-

Rings

If you use your nailer on a daily basis, replacement pistons are cheap insurance against wasted down time and lost profits in the event that a piston or piston shaft wears out.

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 cartridge.

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.

6.Open the nose cover as if to clear a jammed nail.

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 wood dowel or similarly shaped tool, push the piston shaft back inside the nailer until you can grip the piston head and remove it from the cylinder. (If using metal tools, be care- ful not to scratch the discharge area or cyclinder when removing the piston shaft.)

9.Place a new O-ring on the new piston and apply a thin film of the air tool oil on the O-ring.

10.Insert the new piston in the cylinder. Make sure that any 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 grooves on the guide.

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 O-ring set, refer to the appro- priate breakdown diagram in the back of this manual for component loca- tions.

-10- H8230/H8231 15° Roofing Nailer