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H2912/H2913 2-IN-1 NAILER/STAPLER-9-
Replacing Pistons/O-Rings
If you use your nailer/stapler day in and
day out, Grizzly offers repair pistons as
cheap insurance against wasted down
time and lost profits in the event that a pis-
ton or piston shaft becomes worn out. To
replace a piston:
Figure 6. Removing the exhaust cap.
8. With a long flathead screwdriver or
similarly shaped tool, push the piston
shaft back inside the nailer/stapler
until you can grip the piston head and
remove it from the cylinder. (Be care-
ful not to scratch the discharge area
when pushing the piston shaft with the
screwdriver.)
9. Place a new O-ring on the new piston
and apply a thin film of 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,
close the magazine. 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.
Always disconnect air from the nail-
er/stapler whenever servicing!
During maintenance, a nailer/stapler
connected to air may fire accidental-
ly, causing serious personal injury!
1. Disconnect the nailer/stapler from
the air supply!
2. Remove all staples/nails from the
magazine cartridge.
3. Remove the 4 cap screws from the
exhaust cap.
4. Remove the exhaust cap as shown in
Figure 6.
5. The top of the piston should now be
visible inside the cylinder, which is
housed in the head.
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.