Woodstock SHOP FOX W1774 Owner's Manual download pdf (Page 13)

Model W1774 18 Gauge Brad Nailer

-11-

Replacing Pistons/

O-Rings

Always disconnect nailer from air

whenever servicing! During main-

tenance, a nailer connected to air

may fire accidentally, causing seri-

ous personal injury!

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 X1774068) or the

complete O-Ring Repair Kit (Part Number

X1774069).

To replace a piston, do these steps:

1. DISCONNECT NAILER FROM THE AIR

SUPPLY!

2. Remove all nails from the magazine

cartridge, and clean the exterior of

the nailer.

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. 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

until you can grip the piston head and

remove it from the cylinder. Clean

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

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.

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