Tool Operation; Basic Tool Operation (Diagram); Maintaining The Pneumatic Tool; Replacement Parts - Bostitch N100S Manual De Operación Y De Mantenimiento

Bostitch pneumatic tools are cycled by a compressed air operated single piston design.
The following illustrations show the four functional cycles that occur when the tool is operated to
drive a fastener:
EXHAUST
OPEN
PISTON
STOP
RESERVOIR
OF HIGH
PRESSURE
AIR
HOLES IN
CYLINDER
WALL
RETURN
CHAMBER
BUMPER
When working on air tools, note the warnings in this manual and use extra care
evaluating problem tools.
CAUTION: Pusher spring (constant force spring). Caution must be used when working with
the spring assembly. The spring is wrapped around, but not attached to, a roller. If the spring
is extended beyond its length, the end will come off the roller and the spring will roll up with a
snap, with a chance of pinching your hand. Also the edges of the spring are very thin and
could cut. Care must also be taken to insure no permanent kinks are put in the spring as this
will reduce the springs force.

REPLACEMENT PARTS:

BOSTITCH replacement parts are recommended. Do not use modified parts or parts
which will not give equivalent performance to the original equipment.

ASSEMBLY PROCEDURE FOR SEALS:

When repairing a tool, make sure the internal parts are clean and lubricated. Use Parker "O"-LUBE
or equivalent on all "O"-rings. Coat each "O"-ring with "O"-LUBE before assembling. Use a small
amount of oil on all moving surfaces and pivots. After reassembly add a few drops of
BOSTITCH Air Tool Lubricant through the air line fitting before testing.
AIR SUPPLY-PRESSURE AND VOLUME:
Air volume is as important as air pressure. The air volume supplied to the tool may be inadequate
because of undersize fittings and hoses, or from the effects of dirt and water in the system.
Restricted air flow will prevent the tool from receiving an adequate volume of air, even though the
pressure reading is high. The results will be slow operation, misfeeds or reduced driving power.
Before evaluating tool problems for these symptoms, trace the air supply from the tool to the supply
source for restrictive connectors, swivel fittings, low points containing water and anything else that
would prevent full volume flow of air to the tool.
FIG.1
AT REST
HEAD VALVE CLOSED
TRIGGER VALVE PORT
(TO SUPPLY AIR TO TOP OF HEAD VALVE)
RESERVOIR OF
HIGH PRESSURE AIR
TRIGGER VALVE RELEASED
PASSAGE FOR
AIR RELEASED FROM HEAD VALVE
SLOTS FOR AIR FLOW
FOR PISTON RETURN
FIG.3
END OF STROKE
EXHAUST
TRIGGER STILL
STILL
PULLED
CLOSED
HEAD VALVE OPEN
AIR FLOWS
INTO
RETURN
CHAMBER
PISTON IS
SEALED
AGAINST
BUMPER

MAINTAINING THE PNEUMATIC TOOL

BASIC TOOL OPERATION
EXHAUST
SEALED BY
PISTON STOP
TRIGGER VALVE
STILL ACTUATED
-9-
FIG.2
DRIVING STROKE
HEAD VALVE OPEN
TRIGGER VALVE PORT BLOCKED
TRIGGER VALVE
ACTUATED
AIR RELEASED
FROM ABOVE
HEAD VALVE
FIG.4
EXHAUST
RETURNING
OPEN
HEAD VALVE CLOSED
AIR IN
RETURN
CHAMBER
PUSHES
PISTON
UPWARD
TRIGGER VALVE
RELEASED –
AIR PRESSURE RETURNS
TO TOP OF HEAD VALVE