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Model W1779 18 Gauge Stapler Kit
-11-
Replacing Pistons and
O-Rings
Under heavy use, a piston or piston shaft
may wear out. Replacement is quick and
easy. Contact your authorized Shop Fox
dealer to obtain the Piston Repair Kit
(part number X1779001).
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. Taking care not to scratch or dent the
stapler parts, use a wooden dowel
or similarly shaped tool to push the
piston shaft back inside the stapler
until you can grip the piston head and
remove it from the cylinder. Clean
and inspect the parts for cracks,
wear, or burrs.
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. 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
appropriate breakdown diagram
in the back of this manual for
component locations.
To replace a piston and O-ring, do
these steps:
1. DISCONNECT STAPLER FROM THE AIR
SUPPLY!
2. Remove all staples from the magazine
cartridge, and clean the exterior of
the stapler.
3. Remove the four cap screws on the
back 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.
Always disconnect stapler from
air whenever servicing! During
maintenance, a stapler connected
to air may fire accidentally, causing
serious personal injury!