
6
OPERATING INSTRUCTIONS, continued
SEAL REPLACEMENT: There are 7 seals that may
require replacement. We recommend that you have your
PowerStaple Dealer replace the Seals.
SEAL KIT: You may choose to buy a Seal Replacement Kit
and replace the seals yourself. It is good practice to replace
all seals at one time regardless if only one seal needs
replacement.
SEAL DESCRIPTION & NUMBER:
1.) Rubber Seat (#18)
2.) Plunger Seal Set (#10)
3.) Piston U-Cup Lip Seal (#21)
4.) Return Cylinder U-Cup Lip Seal (#17)
5.) Piston Rod U-Cup Lip Seal (#12)
6.) Plunger Wiper Seal (#4)
7.) Return Cylinder O-Ring Gasket (#11)
To change Seals follow these procedures. Be sure the air
line is disconnected from the Stapler fi rst before making any
repairs. Consult the illustration for the name and location of
the following component parts.
SEAL REPLACEMENT REQUIRES REMOVAL OF THE
DRIVING BLADE ASSEMBLY:
1.) Disconnect the air supply.
2.) Remove Rubber Plunger Cap (#7).
3.) Unscrew & remove Body Cap (#2).
4.) Unscrew the three #10-32 cap screws holding the
Plunger (#9) to the Return Cylinder (#16).
5.) Pull the Plunger up and out of the Stapler Body (#1)
cavity.
6.) Remove the Return Cylinder O-Ring Gasket (#11)
located on the top of the Return Cylinder under the Plunger.
7.) Turn the Stapler over and remove the four cap screws
(#3), that fasten the Adapter Foot and Staple Channel
Assembly to the Stapler Body and lift the Assembly off the
Body.
8.) Remove the Rubber Bumper (#24).
9.) Pull the Driving Blade Assembly out of the Stapler Body
by pulling on the Driving Blade.
10.) Hold the Piston Rod (#13) with an 11/16 socket over
its hex end opposite the Piston. Do not use pliers or a
vise anywhere on the metal parts, they can damage the
sealing surfaces.
11.) Use box wrenches to remove the 5/8-18 Jam Nut (#22).
Remove the Dowel Pin (#14) and Driving Blade (#15).
12.) Unscrew the Piston from the Piston Rod using box
wrenches and separate the Piston, Piston Rod and Return
Cylinder.
TO REPLACE THE SEALS:
Rubber Seat (#18):
1.) Remove the Cylinder Sleeve (#23). The Cylinder Sleeve
should slide out of the Stapler Body when you pull out
the Driving Blade Assembly.
2.) Remove the metal Support Ring (#19) and Rubber
Seat from inside the Stapler body. Note that the
chamfer on the inside of the Rubber Seat faces the
BOTTOM of the Stapler, do not reverse the direction of
the chamfer when you replace the Rubber Seat.
3.) Replace the Rubber Seat, Support Ring and
Cylinder Sleeve. Be sure to re install the steel Cylinder
Sleeve with the chamfered inside edge facing the
BOTTOM of the Stapler
Plunger Seal Set (#10):
1.) Remove the Tefl on® Seal and its O-Ring expander
from the groove using a bent paper clip or pick. Be
sure not to scratch the inside walls of the seal groove
with the wire hook.
2.) Clean out the seal groove. Place a new O-Ring
into the seal groove by stretching it over the Plunger
body. Make sure the O-Ring is not twisted in the
groove. Place a new Tefl on° Seal Ring into the seal
groove over the O-Ring.
3.) Carefully push the Tefl on®Seal Ring over the edge
of the Plunger with your thumbs and into the groove.
Do this as quickly as possible to reduce stretching of
the Tefl on®Seal Ring. DO NOT OVER STRETCH THE
TEFLON® SEAL RING! Be sure the Tefl on® Seal
Ring is centered all around the seal groove and not
twisted.
4.) Wipe off the Seal surface with a clean rag and
lubricate it generously with Pneumatic Light Air Tool Oil
lubricant.
Piston U-Cup Lip Seal (#21):
1.) Remove the old Piston U-Cup Lip Seal from the
Piston using a bent paper clip or pick, being careful
not to scratch the inside walls of the seal groove or the
edge of the Piston with the wire hook.
2.) Clean out the seal groove. Place a new U-Cup Lip
Seal into the groove. Make sure the lips is not twisted
in the groove and the lips face the top of the Nailer
See the sketch below.
3.) Carefully wipe off the U-Cup Lip Seal surface with
a clean rag and lubricate it generously with Pneumatic
Light Air Tool Oil lubricant.
Return Cylinder U-Cup Lip Seal (#17):
1.) Use a bent paper clip or pick to remove the old
U-Cup Lip Seal from the internal seal groove inside the
Return Cylinder. Be careful not to scratch the inside
walls of the seal groove with the wire hook.
2.) Clean out the seal groove. Place a new U-Cup Lip
Seal into the groove, be sure it is not twisted in the