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Model W1775 Nailer/Stapler Kit
-11-
Replacing Piston 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 X1775001).
To replace a piston and O-rings, do
these steps:
1. DISCONNECT NAILER/STAPLER FROM
THE AIR SUPPLY!
2. Remove all nails/staples from the
magazine cartridge, and clean the
exterior of the nailer.
3. Remove the four cap screws on the
back of the nailer/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 nailer/sta-
pler.
Always disconnect air from nailer/
stapler whenever servicing! During
maintenance, a nailer/stapler con-
nected to air may fire accidentally,
causing serious personal injury!
6. Open the nose cover as if to clear a
jammed nail/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 nailer parts, use a wooden
dowel or similarly shaped tool to
push the piston shaft back inside the
nailer/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 nailer/
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.