To replace driver (con't.)
3) To remove the driver blade from the piston stem, push the driver blade pin out of the
stem. This will release the blade.
4) Insert new driver blade into the slot in the end of the driver piston stem and assemble the
driver blade pin. Test the side play in the driver blade by grasping the driver piston stem
in one hand and the blade in the other, moving the blade sideways in alignment with the
slot in case of any slight misalignment between the blade and guide in the nose. If there
is no side play, the blade should be removed and the top (pin end) just barely dressed off
with a stone. It is not necessary to do more than smooth off the top to get the necessary
side play. Do not grind. Reinsert the blade and pin in the stem and test for side play once
more. Repeat as necessary to get this small amount of side play. Carefully examine the large
threaded portion of the piston stem. A nylon lock can be seen imbedded in a recessed hole
in the stem. It is very important that this nylon lock can be replaced when its locking efficiency
has been reduced through several disassemblies of the piston. It is necessary to use the sharp
point of a knife or some such instrument to remove this nylon lock. Insert a new one by
setting it into the recessed hole in the stem, and tapping it gently until firmly seated.
*Reverse these instructions to reassemble*
5) Assemble plunger flush with the end of piston stem.
To replace piloted valve seals
1) Remove exhaust deflectors and four hex socket head cap screws holding cap to cylinder.
Remove cap exposing the poppet piston and piloted valve.
2) Remove gasket, piloted valve seat, piloted valve, spring and O-rings.
3) Clean all O-ring grooves. Lubricate new O-rings and assemble.
4) After new O-rings have been assembled to piloted valve, insert spring into valve body.
Lay tool on its side and slide valve into position. Turn tool upright and replace gasket.
5) After new O-ring has been assembled to valve seat, slide it through the gasket and over
the piloted valve.
6) Insert new O-ring in stepped hole in cap directly over piloted valve. Assemble cap using
four socket head cap screws and replace exhaust deflector.
To replace wear plate or blade guide
1) Separate the magazine from the nose by removing four socket head cap screws
2) Remove and replace wear plate or blade guide.
To replace detent spring or pusher spring
1) Remove magazine
2) Set the magazine down on a flat surface. Cup palm over the hooked end of the cover to
prevent the detent pin and the detent pin spring from slipping out and being lost when
cover is removed. Turn the magazine upside down and reach in with a small screwdriver, or
needle nose pliers, and lift the pusher spring off the pusher. Slide cover out the back
end of the magazine.
3) To remove the springs from the magazine, use a 3/32" pin punch and drive the spring
anchor pin out of the magazine body. Replace and reverse the instructions to reassemble.
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