Maintaining The Miii Series Tools - Bostitch MIIIFS Manual De Operación Y De Mantenimiento

MAINTAINING THE MIII SERIES TOOLS

TO REPLACE PISTON:
a. Insert the flats on the lower end of the driver piston stem carefully into the end of piston and plunger
wrench, BC1009.
b. Using another special wrench, BC1009, or another wrench of the proper size, unscrew the plunger from the
upper end of the stem. After this is done, it will be possible to lift the poppet off the stem.
c. Place the special wrench, BC1009, down over the piston stem onto the driver piston, locking the piston ears in
the slots in the wrench. Unscrew the piston from the stem.
TO REPLACE DRIVER:
a. It is not necessary to disassemble the piston-poppet-driver assembly to replace the driver. Pull the poppet up on
the driver piston stem as far as it will go.
b. Insert special wrench, BC1009, over the driver piston, locking the piston ears in the slots in the wrench.
Unscrew the piston from threaded portion of the stem.
c. To remove the driver blade from the piston stem, push the driver blade pin out of the stem. This will release
the blade.
d. 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 and
moving the blade sideways in alignment with the slot in the stem. There should be a small amount of side play
in the blade. This is necessary to take care 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.
e. Assemble plunger flush with 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 deflectors.
MIIIFS
TO REPLACE WEAR PLATE OR BLADE GUIDE:
1. Seperate 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 popping 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" (2.4mm) pin punch and drive the spring anchor pin out of
the magazine body. Replace and reverse the instructions to reassemble.
MIIIFN
TO REPLACE WEAR PLATE OR DRIVER GUIDE:
1. Remove the three socket head cap screws holding the wear plate and driver guide to the magazine assembly.
2. Pull the pusher assembly back to disengage from the wear plate.
3. Remove and replace the wear plate and driver guide.
TO REPLACE the PUSHER SPRING ASSEMBLY:
1. Remove the three socket head cap screws holding the wear plate and driver guide to the magazine assembly.
2. Remove the four socket head cap screws holding the magazine assembly halves together.
3. Remove two of the flat head cap screws holding the plastic spacer to the bottom of the magazine assembly.
Note: remove both screws from the same magazine half.
4. Remove the socket head cap screws holding the pusher handle to the pusher assembly .
5. Remove the shoulder screw holding the pusher drum to the magazine.
6. Replace the pusher assembly.
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