Stanley Bostitch T55 Series User manual

BEFORE OPERATING THIS TOOL,ALL OPERATORS SHOULD STUDY THIS MANUAL TO UNDERSTAND AND FOLLOW THE
SAFETY WARNINGS AND INSTRUCTIONS. KEEP THESE INSTRUCTIONS WITH THE TOOL FOR FUTURE REFERENCE. IF
YOU HAVE ANY QUESTIONS, CONTACT YOUR STANLEY-BOSTITCH REPRESENTATIVE OR DISTRIBUTOR.
OPERATION and MAINTENANCE MANUAL
T55
PNEUMATIC STAPLER
105041REVC 10/98
BOSTITCH®
Stanley Fastening Systems

INTRODUCTION
The Stanley-Bostitch T55 series staplers are precision-built tools, designed for high speed, high volume stapling. These tools
will deliver efficient, dependable service when used correctly and with care. As with any fine power tool, for best
performance the manufacturer’s instructions must be followed. Please study this manual before operating the tool and
understand the safety warnings and cautions. The instructions on installation, operation and maintenance should be read
carefully, and the manuals kept for reference. NOTE: Additional safety measures may be required because of your particular
application of the tool. Contact your Stanley-Bostitch representative or distributor with any questions concerning the tool and
its use. Stanley-Bostitch, Inc., East Greenwich, Rhode Island 02818.
INDEX
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tool Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Air Supply: Fittings, Hoses, Filters, Air Consumption, Regulators,
Operating Pressure, Setting Correct Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Loading the Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dial-A-Depth™ Fastener Control Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Tool Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 8 & 9
Basic Tool Operation (diagram). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintaining the Pneumatic Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Directional Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Quick Release Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
NOTE:
Stanley-Bostitch tools have been engineered to provide excellent customer satisfaction and are designed to achieve maximum
performance when used with precision Stanley-Bostitch fasteners engineered to the same exacting standards.
Stanley-Bostitch cannot assume responsibility for product performance if our tools are used with fasteners or
accessories not meeting the specific requirements established for genuine Stanley-Bostitch nails, staples and accessories.
LIMITED WARRANTY
Stanley-Bostitch, Inc., warrants to the original retail purchaser that this product is free from defects in material and
workmanship, and agrees to repair or replace, at Stanley-Bostitch’s option, any defective product within 90 days from
the date of purchase. This warranty is not transferable. It only covers damage resulting from defects in material or
workmanship, and it does not cover conditions or malfunctions resulting from normal wear, neglect, abuse or accident.
THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THIS WARRANTY.
STANLEY-BOSTITCH SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or
consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific
legal rights, and you may also have other rights which vary from state to state.
To obtain warranty service, you must return the product at your expense together with proof of purchase to a
®
FASTENERS
PROTECT YOUR TOOLS
USE ONLY GENUINE
-2-

-3-
SAFETY INSTRUCTIONS
EYE PROTECTION which conforms to ANSI specifications and provides protection against flying particles
both from the FRONT and SIDE should ALWAYS be worn by the operator and others in the work area when
loading, operating or servicing this tool. Eye protection is required to guard against flying fasteners and
debris, which could cause severe eye injury.
The employer and/or user must ensure that proper eye protection is worn. Eye protection equipment must
conform to the requirements of the American National Standards Institute, ANSI Z87.1-1989 and provide
both frontal and side protection. NOTE: Non-side shielded spectacles and face shields alone do not
provide adequate protection.
CAUTION: ADDITIONAL SAFETY PROTECTION will be required in some environments. For example, the
working area may include exposure to noise level which can lead to hearing damage. The employer and user
must ensure that any necessary hearing protection is provided and used by the operator and others in the
work area. Some environments will require the use of head protection equipment. When required, the
employer and user must ensure that head protection conforming to ANSI Z89.1 1986 is used.
AIR SUPPLY AND CONNECTIONS
Do not use oxygen, combustible gases, or bottled gases as a power source for this tool as tool may
explode, possibly causing injury.
Do not use supply sources which can potentially exceed 200 P.S.I.G. as tool may burst, possibly causing
injury.
The connector on the tool must not hold pressure when air supply is disconnected. If a wrong fitting is
used, the tool can remain charged with air after disconnecting and thus will be able to drive a fastener even
after the air line is disconnected possibly causing injury.
Do not pull trigger or depress contact arm while connected to the air supply as the tool may cycle, possibly
causing injury.
Always disconnect air supply: 1.) Before making adjustments; 2.) When servicing the tool; 3.) When clearing
a jam; 4.) When tool is not in use; 5.) When moving to a different work area, as accidental actuation may
occur, possibly causing injury.
LOADING TOOL
When loading tool: 1.) Never place a hand or any part of body in fastener discharge area of tool; 2.) Never
point tool at anyone; 3.) Do not pull the trigger or depress the trip as accidental actuation may occur,
possibly causing injury.
OPERATION
Always handle the tool with care: 1.) Never engage in horseplay; 2.) Never pull the trigger unless nose
is directed toward the work; 3.) Keep others a safe distance from the tool while tool is in operation as
accidental actuation may occur, possibly causing injury.
The operator must not hold the trigger pulled on contact arm tools except during fastening operation
as serious injury could result if the trip accidentally contacted someone or something, causing the tool
to cycle.
Keep hands and body away from the discharge area of the tool. A contact arm tool may bounce from the
recoil of driving a fastener and an unwanted second fastener may be driven possibly causing injury.
Check operation of the contact arm mechanism frequently. Do not use the tool if the arm is not working
correctly as accidental driving of a fastener may result. Do not interfere with the proper operation of the
contact arm mechanism.
Do not drive fasteners on top of other fasteners or with the tool at an overly steep angle as this may cause
deflection of fasteners which could cause injury.
Do not drive fasteners close to the edge of the work piece as the wood may split, allowing the fastener to
be deflected possibly causing injury.
MAINTAINING THE TOOL
When working on air tools note the warnings in this manual and use extra care when evaluating problem
tools.

-4-
T55 TOOL SPECIFICATIONS
All screws and nuts are metric.
FASTENER SPECIFICATIONS:
TOOL AIR FITTING:
This tool uses a free-flow connector plug, 1/4”N.P.T. The minimum inside diameter should be .200”(5mm).
The fitting must be capable of discharging tool air pressure when disconnected from the air supply.
OPERATING PRESSURE:
The operating pressure of the T55 tool is 70 to 100 p.s.i. (4.9 to 7.1 kg/cm2). Select the operating pressure within
this range for best fastener performance. DO NOT EXCEED THIS RECOMMENDED OPERATING PRESSURE.
AIR CONSUMPTION:
Model T55 requires 2.8 cubic feet per minute (.08 cubic meters) of free air to operate at the rate of 60
fasteners per minute, at 80 p.s.i. (5.6kg/cm2). Take the actual rate at which the tool will be run to determine the
amount of air required. For instance, if your fastener usage averages 30 fasteners per minute, you need 50% of
the tool's c.f.m. of free air which is required for running at 60 fasteners per minute.
OPERATION
MODEL LENGTH HEIGHT WIDTH WEIGHT
T55S4 14.50”(368mm) 11.19”(284mm) 3.62”(92mm) 6.10lb.(2.77kg.)
T55S5 14.50”(368mm) 11.19”(284mm) 3.62”(92mm) 5.9lb.(2.68kg.)
MODEL STAPLE SERIES CROWN WIDTH WIRE SIZE MAXIMUM LEG LENGTH
T55S4 S4-16 Ga. 1/2”(12.7mm) .062”(1.58mm) 2-1/8”(55mm)
T55S5 S5-17 Ga. 7/16”(11.1mm) .054”(1.37mm) 2-1/8”(55mm)
STANLEY-BOSTITCH OFFERS THREE TYPES OF OPERATION FOR THIS SERIES TOOL.
CONTACT TRIP
The common operating procedure on “Contact Trip”tools is for the operator to contact the work to actuate the trip
mechanism while keeping the trigger pulled, thus driving a fastener each time the work is contacted. This will allow
rapid fastener placement on many jobs, such as sheathing, decking and pallet assembly.
All pneumatic tools are subject to recoil when driving fasteners. The tool may bounce, releasing the trip, and if
unintentionally allowed to recontact the work surface with the trigger still actuated (finger still holding trigger pulled)
an unwanted second fastener will be driven.
SEQUENTIAL TRIP
The Sequential Trip requires the operator to hold the tool against the work before pulling the trigger. This makes
accurate fastener placement easier, for instance on framing, toe nailing and crating applications.
The Sequential Trip allows exact fastener location without the possibility of driving a second fastener on recoil, as
described under “Contact Trip”.
The Sequential Trip Tool has a positive safety advantage because it will not accidentally drive a fastener if the tool
is contacted against the work –or anything else –while the operator is holding the trigger pulled.
TRIGGER OPERATED
The Trigger Operated model is cycled by actuation of the trigger only. This model does not have a Contact Arm
and is intended for use only where a Contact Arm CANNOT be used to satisfy the requirements of the application.
The Trigger Operated tool will cycle each time the trigger is actuated.
MODEL IDENTIFICATION:
Refer to Operation Instructions on page 4 before proceeding to use this tool.
CONTACT TRIP SEQUENTIAL TRIP TRIGGER OPERATED
Identified by: Identified by: Identified by:
BLACK TRIGGER GRAY TRIGGER BLACK TRIGGER

-5-
AIR SUPPLY AND CONNECTIONS
Do not use oxygen, combustible gases, or bottled gases as a power source for this tool as
tool may explode, possibly causing injury.
FITTINGS:
Install a male plug on the tool which is free flowing and which will release air pressure from the tool when
disconnected from the supply source.
HOSES:
Air hoses should have a minimum of 150 p.s.i. (10.6 kg/cm2) working pressure rating or 150 percent of the
maximum pressure that could be produced in the air system. The supply hose should contain a fitting that will
provide “quick disconnecting”from the male plug on the tool.
SUPPLY SOURCE:
Use only clean regulated compressed air as a power source for this tool. NEVER USE OXYGEN, COMBUSTIBLE
GASES, OR BOTTLED GASES, AS A POWER SOURCE FOR THIS TOOL AS TOOL MAY EXPLODE.
REGULATOR:
A pressure regulator with an operating pressure of 0 - 125 p.s.i. (0 - 8.79 KG/CM2) is required to control the
operatiing pressure for safe operation of this tool. Do not connect this tool to air pressure which can potentially
exceed 200 p.s.i. (14 KG/CM2)as tool may fracture or burst, possibly causing injury.
OPERATING PRESSURE:
Do not exceed recommended maximum operating pressure as tool wear will be greatly increased. The air supply
must be capable of maintaining the operating pressure at the tool. Pressure drops in the air supply can reduce the
tool’s driving power. Refer to “TOOL SPECIFICATIONS”for setting the correct operating pressure for the tool.
FILTER:
Dirt and water in the air supply are major causes of wear in pneumatic tools. A filter will help to get the best
performance and minimum wear from the tool. The filter must have adequate flow capacity for the specific
installation. The filter has to be kept clean to be effective in providing clean compressed air to the tool. Consult
the manufacturer’s instructions on proper maintenance of your filter. A dirty and clogged filter will cause a pressure
drop which will reduce the tool’s performance.
LUBRICATION
Frequent, but not excessive, lubrication is required for best performance. Oil added through the air line connection
will lubricate the internal parts. Use STANLEY-BOSTITCH Air Tool Lubricant, Mobil Velocite #10, or equivalent. Do
not use detergent oil or additives as these lubricants will cause accelerated wear to the seals and bumpers in the
tool, resulting in poor tool performance and frequent tool maintenance.
If no airline lubricator is used, add oil during use into the air fitting on the tool once or twice a day. Only a few
drops of oil at a time is necessary. Too much oil will only collect inside the tool and will be noticeable in the
exhaust cycle.
COLD WEATHER OPERATION:
For cold weather operation, near and below freezing, the moisture in the air line may freeze and prevent tool
operation. We recommend the use of STANLEY-BOSTITCH WINTER FORMULA air tool lubricant or permanent
antifreeze (ethylene glycol) as a cold weather lubricant.
CAUTION: Do not store tools in a cold weather environment to prevent frost or ice formation on the tools
operating valves and mechanisms that could cause tool failure.
NOTE: Some commercial air line drying liquids are harmful to “O”-rings and seals – do not use these low
temperature air dryers without checking compatibility.

-6-
EYE PROTECTION which conforms to ANSI specifications and provides protection against flying
particles both from the FRONT and SIDE should ALWAYS be worn by the operator and others in the work
area when loading, operating or servicing this tool. Eye protection is required to guard against flying
fasteners and debris, which could cause severe eye injury.
The employer and/or user must ensure that proper eye protection is worn. Eye protection equipment
must conform to the requirements of the American National Standards Institute, ANSI Z87.1-1989 and
provide both frontal and side protection. NOTE: Non-side shielded spectacles and face shields alone do
not provide adequate protection.
TO PREVENT ACCIDENTAL INJURIES:
• Never place a hand or any other part of the body in nail discharge area of tool while the air supply
is connected.
• Never point the tool at anyone else.
• Never engage in horseplay.
• Never pull the trigger unless nose is directed at the work.
• Always handle the tool with care.
• Do not pull the trigger or depress the trip mechanism while loading the tool.
LOADING THE T55
A
B
NOTE: Use only staples recommended by Stanley-Bostitch for the T55 Series staplers or staples which meet Stanley-Bostitch specifications.
1. Move pusher to rear until latched.
Cover will open. Pusher front will
drop into notch on top of magazine
assembly.
2. Drop staple stick over magazine and
slide forward. Repeat until magazine is
loaded, allowing enough space for pusher
to disengage the magazine and the cover
to close. Approximately 1/2" (13mm)
3. Pull and hold top part of knob (A)
and depress bottom part of knob
(B) in a clockwise direction to
release pusher.
The DIAL-A-DEPTH™Fastener Control adjustment feature provides close control of the fastener drive depth; from flush with the
work surface to shallow or deep countersink. First, set the air pressure for consistent drive in the specific work as described on page
8, then use the DIAL-A-DEPTH™Fastener Control adjustment to give the desired depth of drive.
TO ADJUST DIAL-A DEPTH™FASTENER CONTROL ADJUSTMENT:
“DIAL-A-DEPTH™” FASTENER CONTROL ADJUSTMENT
Always disconnect air supply: 1. Before making adjustments; 2. When servicing the tool; 3. When clearing a jam;
4. When tool is not in use; 5. When moving to a different work area, as accidental actuation may occur, possibly
causing injury.
1. With air pressure set (refer to Setting the Correct Pressure on (Page 8), drive a few fasteners
into a representative material sample to determine if adjustment is necessary.
2. If adjustment is required, disconnnect air supply.
3. Refer to label on outside of door for direction to turn adjusting nut. (See illustration)
4. Open trip cover and turn adjusting nut as shown to set the desired fastener countersink depth.
5. Close cover. Before reconnecting air supply, check that trip mechanism parts operate freely
with no binding or sticking.
6. Reconnect air supply.

-7-
EYE PROTECTION which conforms to ANSI specifications and provides protection
against flying particles both from the FRONT and SIDE should ALWAYS be worn by the
operator and others in the work area when loading, operating or servicing this tool. Eye
protection is required to guard against flying fasteners and debris, which could cause
severe eye injury.
The employer and/or user must ensure that proper eye protection is worn. Eye protection
equipment must conform to the requirements of the American National Standards
Institute, ANSI Z87.1-1989 and provide both frontal and side protection. NOTE: Non-side
shielded spectacles and face shields alone do not provide adequate protection.
BEFORE HANDLING OR OPERATING THIS TOOL:
I. READ AND UNDERSTAND THE WARNINGS CONTAINED IN THIS MANUAL.
II. REFER TO “TOOL SPECIFICATIONS” IN THIS MANUAL TO IDENTIFY THE
OPERATING SYSTEM ON YOUR TOOL.
1. TRIGGER OPERATION
A TRIGGER OPERATED tool requires a single action to drive a fastener. Each time the trigger is pulled the tool
will drive a fastener. The trigger operated model is intended for use only when a contact trip or sequential trip
cannot be used due to the requirements of the application.
2. CONTACT TRIP OPERATION
The CONTACT TRIP MODEL tool contains a contact trip that operates in conjunction with the trigger to drive a
fastener. There are two methods of operation to drive fasteners with a contact trip tool.
A. SINGLE FASTENER PLACEMENT: To operate the tool in this manner, first position the contact trip on
the work surface, WITHOUT PULLING THE TRIGGER. Depress the contact trip until the nose touches
the work surface and then pull the trigger to drive a fastener. Do not press the tool against the work
with extra force. Instead, allow the tool to recoil off the work surface to avoid a second unwanted
fastener. Remove your finger from the trigger after each operation.
B. RAPID FASTENER OPERATION: To operate the tool in this manner, hold the tool with the contact trip
pointing towards but not touching the work surface. Pull the trigger and then tap the contact trip
against the work surface using a bouncing motion. Each depression of the contact trip will cause a
fastener to be driven.
There are three available systems on STANLEY-BOSTITCH pneumatic tools. They are:
1. TRIGGER OPERATION 2. CONTACT TRIP OPERATION 3. SEQUENTIAL TRIP OPERATION
The operator must not hold the trigger pulled on contact trip tools except during fastening
operation, as serious injury could result if the trip accidentally contacted someone or
something, causing the tool to cycle.
Keep hands and body away from the discharge area of the tool. A contact trip tool may
bounce from the recoil of driving a fastener and an unwanted second fastener may be
driven, possibly causing injury.
3. SEQUENTIAL TRIP OPERATION:
The SEQUENTIAL TRIP MODEL contains a contact trip that operates in conjunction with the trigger to drive a
fastener. To operate a sequential trip tool, first position the contact trip on the work surface WITHOUT PULLING
THE TRIGGER. Depress the contact trip and then pull the trigger to drive a fastener. As long as the contact trip
is contacting the work and is held depressed, the tool will drive a fastener each time the trigger is depressed. If
the contact trip is allowed to leave the work surface, the sequence described above must be repeated to drive
another fastener.
TOOL OPERATION
OPERATION

-8-
TOOL OPERATION CHECK
CAUTION: Remove all fasteners from tool before performing tool operation check.
1.TRIGGER OPERATED TOOL:
A. With finger off the trigger, hold the tool with a firm grip on the handle.
B. Place the nose of the tool against the work surface.
C. Pull the trigger to drive. Release the trigger and cycle is complete.
CAUTION: THE TOOL WILL CYCLE EACH TIME THE TRIGGER IS PULLED!
2.CONTACT TRIP OPERATION:
A. With finger off the trigger, press the contact trip against the work surface.
THE TOOL MUST NOT CYCLE.
B. Hold the tool off the work surface, and pull the trigger.
THE TOOL MUST NOT CYCLE.
C. With the tool off the work surface, pull the trigger. Press the contact trip against the work surface.
THE TOOL MUST CYCLE.
D. Without touching the trigger, press the contact trip against the work surface, then pull the trigger.
THE TOOL MUST CYCLE.
3.SEQUENTIAL TRIP OPERATION:
A. Press the contact trip against the work surface, without touching the trigger.
THE TOOL MUST NOT CYCLE.
B. Hold the tool off the work surface and pull the trigger.
THE TOOL MUST NOT CYCLE.
Release the trigger. The trigger must return to the trigger stop on the frame.
C. Pull the trigger and press the contact trip against the work surface.
THE TOOL MUST NOT CYCLE.
D. With finger off the trigger, press the contact trip against the work surface. Pull the trigger.
THE TOOL MUST CYCLE.
IN ADDITION TO THE OTHER WARNINGS CONTAINED IN THIS MANUAL
OBSERVE THE FOLLOWING FOR SAFE OPERATION
• Use the STANLEY-BOSTITCH pneumatic tool only for the purpose for which it was designed.
• Never use this tool in a manner that could cause a fastener to be directed toward the user or others in the
work area.
• Do not use the tool as a hammer.
• Always carry the tool by the handle. Never carry the tool by the air hose.
• Do not alter or modify this tool from the original design or function without approval from
STANLEY-BOSTITCH, INC.
• Always be aware that misuse and improper handling of this tool can cause injury to yourself and others.
• Never clamp or tape the trigger or contact trip in an actuated position.
• Never leave a tool unattended with the air hose attached.
• Do not operate this tool if it does not contain a legible WARNING LABEL.
• Do not continue to use a tool that leaks air or does not function properly. Notify your nearest
Stanley-Bostitch representative if your tool continues to experience functional problems.

-9-
BASIC TOOL OPERATION
Stanley-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:
MAINTAINING THE PNEUMATIC TOOL
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:
STANLEY-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 STANLEY-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 FIG.2 DRIVING STROKE
FIG.3
END OF STROKE
TRIGGER STILL
PULLED
FIG.4
RETURNING
HEAD VALVE CLOSED
EXHAUST
OPEN
AIR IN
RETURN
CHAMBER
PUSHES
PISTON
UPWARD
EXHAUST
STILL
CLOSED HEAD VALVE OPEN
TRIGGER VALVE
STILL ACTUATED
AIR FLOWS
INTO
RETURN
CHAMBER
PISTON IS
SEALED
AGAINST
BUMPER
TRIGGER VALVE
RELEASED –
AIR PRESSURE RETURNS
TO TOP OF HEAD VALVE
EXHAUST
SEALED BY
PISTON STOP HEAD VALVE OPEN
TRIGGER VALVE PORT
BLOCKED
AIR RELEASED
FROM ABOVE
HEAD VALVE
TRIGGER VALVE
ACTUATED
EXHAUST
OPEN
HEAD VALVE CLOSED
SLOTS FOR AIR FLOW
FOR PISTON RETURN
TRIGGER VALVE RELEASED
PASSAGE FOR
AIR RELEASED FROM HEAD VALVE
TRIGGER VALVE PORT
(TO SUPPLY AIR TO TOP OF HEAD VALVE)
PISTON
STOP
RETURN
CHAMBER
BUMPER
RESERVOIR
OF HIGH
PRESSURE
AIR
HOLES IN
CYLINDER
WALL
RESERVOIR OF
HIGH PRESSURE AIR

-10-
TROUBLE SHOOTING
PROBLEM CAUSE CORRECTION
Trigger valve housing leaks air O-ring cut or cracked Replace O-ring
Trigger valve stem leaks air O-ring/seals cut or cracked Replace trigger valve assembly
Frame/nose leaks air Loose nose screws Tighten and recheck
O-ring or Gasket is cut or cracked Replace O-ring or gasket
Bumper cracked/worn Replace bumper
Frame/cap leaks air Damaged gasket or seal Replace gasket or seal
Cracked/worn head valve bumper Replace bumper
Loose cap screws Tighten and recheck
Failure to cycle Air supply restriction Check air supply equipment
Tool dry, lack of lubrication Use STANLEY-BOSTITCH Air Tool Lubricant
Worn head valve O-rings Replace O-rings
Broken cylinder cap spring Replace cylinder cap spring
Head valve stuck in cap Disassemble/Check/Lubricate
Lack of power; slow to cycle Tool dry, lacks lubrication Use STANLEY-BOSTITCH Air Tool Lubricant
Broken cylinder cap spring Replace cap spring
O-rings/seals cut or cracked Replace O-rings/seals
Exhaust blocked Check bumper, head valve spring, muffler
Trigger assembly worn/leaks Replace trigger assembly
Dirt/tar build up on driver Disassemble nose/driver to clean
Cylinder sleeve not seated correctly
on bottom bumper Disassemble to correct
Head valve dry Disassemble/lubricate
Air pressure too low Check air supply equipment
Skipping fasteners; intermittent feed Worn bumper Replace bumper
Tar/dirt in driver channel Disassemble and clean nose and driver
Air restriction/inadequate air flow through
quick disconnect socket and plug Replace quick disconnect fittings
Worn piston O-ring Replace O-ring, check driver
Tool dry, lacks lubrication Use STANLEY-BOSTITCH Air Tool Lubricant
Damaged pusher spring Replace spring
Low air pressure Check air supply system to tool
Loose magazine nose screws Tighten all screws
Fasteners too short for tool Use only recommended fasteners
Bent fasteners Discontinue using these fasteners
Wrong size fasteners Use only recommended fasteners
Leaking head cap gasket Tighten screws/replace gasket
Trigger valve O-ring cut/worn Replace O-ring
Broken/chipped driver Replace driver (check piston O-ring)
Dry/dirty magazine Clean/lubricate use STANLEY-BOSTITCH
Air Tool Lubricant
Worn magazine Replace magazine
Fasteners jam in tool Driver channel worn Replace nose/check door
Wrong size fasteners Use only recommended fasteners
Bent fasteners Discontinue using these fasteners
Loose magazine/nose screws Tighten all screws
Broken/chipped driver Replace driver
COIL NAILERS
Skipping fasteners; intermittent feed Feed piston dry Add STANLEY-BOSTITCH Air Tool Lubricant
in hole in feed piston cover
Feed piston O-rings cracked/worn Replace O-rings/check bumper and spring.
Lubricate assembly.
Check Pawl binding Inspect Pawl and spring on door.
Must work freely.
Canister bottom not set correctly Set canister bottom for length of nails
being used
Broken weld wires in nail coil Remove coil of nails and use another coil
Fasteners jam in tool/canister Wrong size fasteners for tool Use only recommended fasteners/check canister
bottom adjustment
Broken welded wires in nail coil Remove coil of nails and use another coil
Wrong slide plate adjustment for
wire/plastic collated nail coil Adjust switch pins for wire/plastic collated nail coil

DIRECTIONAL EXHAUST DEFLECTOR
Loosen screw as shown. Adjust to desired exhaust direction and tighten screw.
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ACCESSORIES AVAILABLE
BC601 4 oz. Stanley-Bostitch Air -Tool Lubricant
BC602 1 pint Stanley-Bostitch Air -Tool Lubricant
BC603 1 pint Stanley-Bostitch “Winter-Fromula”Air-Tool Lubricant
BC604 1 quart Stanley-Bostitch Air -Tool Lubricant
851325 Locite Grade 271 (.02 oz.)
851385 Locite Grade 242 (.02 oz.)
N80K2 Remote Control Kit
ORK1 O-Ring Kit
BK6 Bumper Kit
T55K1 Speed Enhancer Kit
100679 Lube (1 lb can)
Models T55S4 and T55S5 contain a Quick Release Door feature. The door is designed to “pop”open if a jam occurs providing easy access for
removing a jammed fastener.
ALWAYS DISCONNECT AIR SUPPLY BEFORE CLEARING A JAMMED FASTENER.
If the door does not “pop”open when a jam occurs, it can easily be opened with a screwdriver, as shown in illustration #1. Use a firm twist on the
screwdriver to open the door, see illustration #2.
The door will not open completely if the driver is still down. To open the door completely the driver must be pushed back into the tool.
The “Quick Release Door”makes cleaning the nose and front portion of the magazine a rapid and easy operation with a minimum of effort.
To close the door simply press the door firmly against the edge of the work table or suitable stationary object until the two latch pins snap into a locked
position.
CAUTION: Do not use your hands to close the door as injury may occur if skin is pinched between the door and nose when the latch pins
engage.
QUICK RELEASE DOOR
FIG. 1 FIG. 2