Grizzly H7678 instruction manual Replacing Pistons/O Rings

Replacing Pistons/O-

Rings

If you use your stapler day in and day out, repair pistons are cheap insurance against wasted down time and lost profits, in the event that a piston or piston shaft becomes worn out. A replacement piston and O-ring kit, part PH7678075, may be purchased for the Model H7678.

Always disconnect air from stapler whenever servicing! During main- tenance, a stapler connected to air may fire accidentally, causing seri- ous personal injury!

To replace a piston:

1.DISCONNECT STAPLER FROM THE AIR SUPPLY!

2.Remove all staples from the magazine cartridge.

3.Remove the four cap screws on the head of the stapler, 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 stapler.

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

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 similarly shaped tool, push the piston shaft back inside the stapler until you can grip the piston head and remove it from the cylinder. (Be careful not to scratch the discharge area when push- ing the piston shaft with the screw- driver.)

9.Place a new O-ring on the new piston and apply a thin film of the stapler 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 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, double-check the alignment of the piston shaft with the grooves on the guide.

11.After the piston is inserted correctly, close the magazine pusher. 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 appro- priate breakdown diagram in the back of this manual for component loca- tions.

H7678 18 Gauge Deep Stapler Kit -11-