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  9. Stihl MS 461 Rescue User manual

Stihl MS 461 Rescue User manual

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{
STIHL MS 461 Rescue Saw
WARNING This saw is capable of
severe kickback which may cause serious or
fatal injury. Only for users with extraordinary
cutting needs and experience and training
dealing with kickback. Chain saws with
significantly reduced kickback potential are
available. STIHL recommends the use of STIHL
reduced kickback bar and low kickback chain.
ADVERTENCIA Esta sierra es capaz
de causar contragolpes severos, los cuales
pueden causar lesiones graves o mortales. Sólo
es apta para usuarios con necesidades
extraordinarias de corte y mucha experiencia y
capacitación en el manejo de los contragolpes.
Existen sierras con un potencial mucho menor
de causar contragolpes. STIHL recomienda
usar una barra y cadena de contragolpe
reducido de STIHL.
Read Instruction Manual thoroughly before
use and follow all safety precautions –
improper use can cause serious or fatal injury.
Antes de usar la máquina lea y siga todas las precauciones
de seguridad dadas en el manual de instrucciones – el uso
incorrecto puede causar lesiones graves o mortales.
Instruction Manual
Manual de instrucciones
Instruction Manual
1 - 64
Manual de instrucciones
65 - 135
Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2016
0458-776-8621-A. VA1.J16.
0000006256_011_GB
MS 461 R
English
1
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
The Rescue Saw is specially designed
for rescue operations. Only persons
specifically trained for rescue operations
should use the STIHL Rescue Saw.
Allow only persons who fully understand
this manual to operate your STIHL
Rescue Saw.
To receive maximum performance and
satisfaction from your STIHL Rescue
Saw, it is important that you read, follow
and understand the safety precautions
and the operating and maintenance
instructions in chapter "Safety
Precautions and Working Techniques"
before using your Rescue Saw. For
further information you can go to
www.stihlusa.com.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
manual.
WARNING
Because a Rescue Saw is a high-speed
wood-cutting tool, some special safety
precautions must be observed as with
any other power saw to reduce the risk
of personal injury. Careless or improper
use may cause serious or even fatal
injury.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 3
Depth Limiter 27
Adjusting Cutting Depth 28
Cutting Attachment 29
Mounting the Bar and Chain 30
Tensioning the Chain 31
Checking Chain Tension 32
Fuel 32
Fueling 34
Chain Lubricant 36
Filling Chain Oil Tank 36
Checking Chain Lubrication 37
Chain Brake 37
Winter Operation 38
Starting / Stopping the Engine 39
Operating Instructions 42
Oil Quantity Control 43
Taking Care of the Guide Bar 44
Air Filter System 44
Remove air filter 45
Cleaning the Air Filter 45
Engine Management 46
Adjusting the Carburetor 46
Spark Arresting Screen in Muffler 47
Spark Plug 48
Storing the Machine 49
Checking and Replacing the Chain
Sprocket 50
Maintaining and Sharpening the
Saw Chain 51
Maintenance and Care 55
Main Parts 57
Specifications 59
Ordering Spare Parts 60
Maintenance and Repairs 60
Disposal 61
STIHL Incorporated Federal
Emission Control Warranty
Statement 62
Trademarks 64
MS 461 R
English
2
This Instruction Manual refers to a
STIHL chain saw, also called a machine
in this Instruction Manual.
Pictograms
The meanings of the pictograms
attached to or embossed on the
machine are explained in this manual.
Depending on the model concerned, the
following pictograms may be on your
machine.
Symbols in Text
Many operating and safety instructions
are supported by illustrations.
The individual steps or procedures
described in the manual may be marked
in different ways:
NA bullet marks a step or procedure.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
NLoosen the screw (1).
NLever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
DANGER
Indicates an imminent risk of severe or
fatal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in severe or
fatal injury.
NOTICE
Indicates a risk of property damage,
including damage to the machine or its
individual components.
Engineering Improvements
STIHL’s philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time to time. Therefore,
some changes, modifications and
improvements may not be covered in
this manual. If the operating
characteristics or the appearance of
your machine differs from those
described in this manual, please contact
your STIHL dealer or the STIHL
distributor for your area for assistance.
Guide to Using this Manual
Fuel tank; fuel mixture of
gasoline and engine oil
Chain oil tank; chain oil
Engaging and disengag-
ing the STIHL Quickstop
chain brake
Direction of chain rotation
Ematic; chain oil quantity
control
Tension the chain
Intake air preheating for
winter operation
Intake air for summer
operation
Handle heating
Operate decompression
valve
Operate manual fuel
pump
MS 461 R
English
3
The STIHL Rescue Saw has been
specifically designed for use in rescue
operations, e.g., by fire services,
emergency services, disaster services,
etc.
WARNING
The use of this chain saw may be
hazardous. The saw chain has many
sharp cutters. If the cutters contact your
flesh, they will cut you, even if the chain
is not moving.
WARNING
The use of this saw for rescue
operations, even by trained personel,
can be extremely hazardous and may
result in severe or fatal personal injury.
The risk of injury from reactive forces,
fire or explosion, electrocution,
damaged chain and other causes when
employing a chainsaw for these
purposes is substantially increased.
WARNING
The STIHL Rescue Saw may be used
only by personnel who have been
specifically trained for rescue
operations. They must not only be
knowledgeable concerning the correct
use of chainsaws but also able to assess
the additional risks and dangers
associated with emergency situations.
Cutting with a Rescue Saw requires
special working techniques that must be
utilized to reduce the risk of accidents
and injuries to the user, bystanders and
the persons being rescued. It also
requires the use of a certain, specially
designed, carbide-tipped chain
specifically authorized by STIHL for
such purposes.
WARNING
Reactive forces, including kickback, can
be dangerous. Pay special attention to
the section on reactive forces.
Have your STIHL dealer show you how
to operate your chain saw. All safety
precautions that are generally observed
when working with an axe or a hand saw
also apply to the operation of chain
saws. Observe all applicable federal,
state and local safety regulations,
standards and ordinances. When using
a chain saw for logging purposes, for
instance, refer to the OSHA regulations
for "logging operations" at 29 Code of
Federal Regulations 1910.266.
WARNING
Do not lend or rent your chain saw
without the instruction manual. Be sure
that anyone using it understands the
information contained in this manual.
The use of noise emitting chain saws
may be restricted to certain times by
national, state or local regulations.
Cutting any materials other than wood
will decrease the service life of the chain
and may cause irreversible damage to it,
requiring replacement before work with
the saw can be continued. The rescue
community, however, generally accepts
such increased safety and maintenance
requirements in the pursuit of preserving
life and property..
WARNING
Minors should never be allowed to use
this chain saw. Bystanders, especially
children, and animals should not be
allowed in the area where it is in use.
Most of these safety precautions and
warnings apply to the use of all STIHL
chain saws. Different models may have
different parts and controls. See the
appropriate section of your instruction
manual for a description of the controls
and the function of the parts of your
model.
Since this machine can also be used as
a conventional chain saw, warnings and
instructions are included here with
respect to, e.g., the felling and limbing of
trees. There are additional warnings,
however, specifically with respect to the
operation of Rescue Saws. For instance,
Safety Precautions and
Working Techniques
Because a chain saw is a
high-speed, fast-cutting
power tool, special safety
precautions must be
observed to reduce the
risk of personal injury.
It is important that you
read, fully understand
and observe the following
safety precautions and
warnings. Read the
instruction manual and
the safety instructions
periodically. Careless or
improper use may cause
serious or fatal injury.
Save the instruction man-
ual for future reference.
MS 461 R
English
4
see the sections of these General Safety
Precautions dealing with "Proper
Clothing" and "Cutting Techniques."
The "Rescue" model normally uses a
special heavy-duty, carbide-tipped chain
specifically designed for cutting various
materials encountered in rescue
operations. Due to the possibility of a
fractured cutting tooth being propelled
away from the machine, bystanders
should be kept even further away, i.e. at
least 100 feet (30 m), than for regular
chain saws. Like all chain saws, a
"Rescue Saw" should be used only in
good visibility and daylight conditions.
WARNING
Always stop the engine and activate the
QuickStop Chainbrake before
transporting or carrying out any work on
the chain saw. This avoids the risk of the
engine starting unintentionally.
STIHL recommends the use of genuine
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
Safe use of a chain saw involves
1the operator
2the chain saw
3the use of the chain saw.
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate
this chain saw when you are fatigued.
WARNING
Be alert – if you get tired, take a break.
Tiredness may result in loss of control.
Working with any power tool can be
strenuous. If you have any condition that
might be aggravated by strenuous work,
check with your doctor before operating
this chain saw.
WARNING
Prolonged use of a chain saw (or other
power tools) exposing the operator to
vibrations may produce whitefinger
disease (Raynaud's phenomenon) or
carpal tunnel syndrome.
These conditions reduce the hand's
ability to feel and regulate temperature,
produce numbness and burning
sensations and may cause nerve and
circulation damage and tissue necrosis.
All factors which contribute to white-
finger disease are not known, but cold
weather, smoking and diseases or
physical conditions that affect blood
vessels and blood transport, as well as
high vibration levels and long periods of
exposure to vibration are mentioned as
factors in the development of whitefinger
disease. In order to reduce the risk of
whitefinger disease and carpal tunnel
syndrome, please note the following:
–Most STIHL chain saws are
available with an anti-vibration
("AV") system designed to reduce
the transmission of vibrations
created by the chain saw to the
operator's hands. An AV system is
recommended for those persons
using chain saws on a regular or
sustained basis.
–Wear gloves and keep your hands
warm. Heated handles, which are
available on some STIHL chain
saws, are recommended for cold
weather use.
–Keep the AV system well
maintained. A chain saw with loose
components or with damaged or
worn AV elements will tend to have
higher vibration levels.
–Keep the saw chain sharp and well
maintained. A dull saw chain will
increase cutting time, and pressing
a dull saw chain through wood will
increase the vibrations transmitted
to your hands.
–Maintain a firm grip at all times, but
do not squeeze the handles with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
whitefinger disease or carpal tunnel
syndrome. Therefore, continual and
regular users should closely monitor the
MS 461 R
English
5
condition of their hands and fingers. If
any of the above symptoms appear,
seek medical advice immediately.
WARNING
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. To
reduce the risk of serious or fatal injury,
persons with a pacemaker should
consult their physician and the
pacemaker manufacturer before
operating this chain saw.
Proper Clothing
WARNING
To reduce the risk of injury, the operator
should wear proper protective apparel.
When using this Rescue Saw in an
emergency situation, the operator
should wear clothing appropriate to the
type of operation. For example, fire
fighters using the saw at a fire should
wear their normal protective apparel, as
well as any additional apparel required
below.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
THE CHAIN SAW
For illustrations and definitions of the
chain saw parts see the chapter on
"Main Parts."
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement.To reduce the
risk of cut injuries, wear
the type of overalls, long
pants or chaps that con-
tain pads of cut-retardant
material, if feasible
depending on the individ-
ual application. Avoid
loose-fitting jackets,
scarfs, neckties, jewelry,
flared or cuffed pants,
unconfined long hair or
anything that could
become caught on
branches, brush or the
moving parts of the chain
saw. Secure hair so it is
above shoulder level..
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
are recommended. Never
wear sandals, flip-flops or
go barefoot.
Always wear heavy-duty
work gloves (e.g. made of
leather or wear resistant
material) when handling
the chain saw and the
cutting tool. Heavy-duty,
nonslip gloves improve
your grip and help to pro-
tect your hands.
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protec-
tive glasses with
adequate top and side
protection complying with
ANSI Z87 "+" (or your
applicable national stand-
ard). If there is a risk of
injury to your face, STIHL
recommends that you
also wear a face shield or
face screen over your
goggles or protective
glasses.
Wear an approved safety
hard hat to reduce the
risk of injury to your head.
Chain saw noise may
damage your hearing.
Wear sound barriers (ear
plugs or ear mufflers) to
help protect your hearing.
Continual and regular
users should have their
hearing checked
regularly.
MS 461 R
English
6
WARNING
Never modify this chain saw in any way.
Only attachments supplied by STIHL or
expressly approved by STIHL for use
with the specific STIHL model are
authorized. Although certain
unauthorized attachments are useable
with STIHL chain saws, their use may, in
fact, be extremely dangerous. For
rescue operations, when cutting
materials other than wood, use only the
chain specifically authorized by STIHL
for such purposes.
WARNING
Never operate your chain saw if it is
damaged, improperly adjusted or
maintained, or not completely or
securely assembled.
If this chain saw is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work. Check in
particular that the fuel system is tight (no
leaks) and that the controls and safety
devices are working properly. Do not
continue operating this chain saw if it is
damaged. In case of doubt, have it
checked by your STIHL servicing dealer.
THE USE OF THE CHAIN SAW
Transporting the Chain Saw
WARNING
Always stop the engine before putting
the chain saw down. Carrying a chain
saw with the engine running may be
extremely dangerous.
Accidental acceleration of the engine
can cause the saw chain to rotate.
Always engage the chain brake when
taking more than a few steps.
By hand: When transporting your chain
saw by hand, the engine must be shut
off and the chain saw must be in the
proper position, i.e., grip the top handle
and place the muffler away from the
body; the chain guard (scabbard) should
be over the saw chain and guide bar,
which should point backwards, away
from the direction in which you are
walking.
By vehicle: When transporting in a
vehicle, keep saw chain and bar covered
with the chain guard (scabbard).
Properly secure your chain saw to
prevent turnover, fuel spillage and
damage to the chain saw.
Fuel
Your STIHL chain saw uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
WARNING
Fueling Instructions
WARNING
Fuel your chain saw in well-ventilated
areas, outdoors. Always shut off the
engine and allow it to cool before
refueling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
In order to reduce the risk of burns and
other personal injury from escaping gas
vapor and fumes, remove the fuel filler
cap on your chain saw carefully so as to
allow any pressure build-up in the tank
to release slowly.
001BA275 KN
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and seri-
ous burn injury or
property damage. Use
extreme caution when
handling gasoline or fuel
mix. Do not smoke or
bring any fire or flame
near the fuel or the chain
saw. Note that combus-
tible fuel vapor may
escape from the fuel
system.
MS 461 R
English
7
Flip up the lever and slowly turn left (1)
to the vent position of the cap at about
1/8 turn where the cap is held in place by
the thread. Once the fumes have been
relieved, turn (2) the cap further to the
1/4 turn position where the tool-less cap
can be removed from the tank thread.
Never remove the fuel filler cap by
quickly turning it to the full 1/4 open
position without letting it vent out any
vapor/pressure build-up at the
1/8 position.
Never remove the fuel filler cap while the
engine is running.
Select bare ground for fueling and move
at least 10 feet (3 m) from the fueling
spot before starting the engine. Wipe off
any spilled fuel before starting your
chain saw.
WARNING
Different models may be equipped with
different fuel caps.
Toolless cap with grip
WARNING
In order to reduce the risk of fuel spillage
and fire from an improperly tightened
fuel cap, correctly position and tighten
the fuel cap in the fuel tank opening.
To do this with this STIHL cap, raise the
grip on the top of the cap until it is upright
at a 90° angle. Insert the cap in the fuel
tank with the positioning mark on the
grip of the cap and the "open" mark on
the fuel tank opening lining up. Using the
grip, press the cap down firmly while
turning it clockwise as far as it will go
(approx. 1/4 turn). The positioning mark
on the cap should now line up with the
"closed" mark on the tank.
Misaligned, damaged or broken cap
NIf the cap does not drop fully into the
opening when the positioning marks
line up and/or if the cap does not
tighten properly when twisted, the
base of the cap may be prematurely
rotated (in relation to the top) to the
closed position. Such misalignment
can result from handling, cleaning
or an improper attempt at
tightening.
2
0000-GXX-0908-A0
1
Check for fuel leakage
while refueling and during
operation. If fuel leakage
is found, do not start or
run the engine until the
leak is fixed and any
spilled fuel has been
wiped away. Take care
not to get fuel on your
clothing. If this happens,
change your clothing
immediately.
001BA234 KN
Fold the grip flush with
the top of the cap. Grip
the cap and check for
tightness. If the grip does
not lie completely flush
with the cap and the
detent on the grip does
not fit in the correspond-
ing recess in the filler
opening, or if the cap is
loose in the filler opening,
the cap is not properly
seated and tightened and
you must repeat the
above steps.
MS 461 R
English
8
NTo return the cap to the open
position for installation, turn the cap
(with the grip up) until it drops fully
into the tank opening. Next, twist the
cap counterclockwise as far as it will
go (approx. 1/4 turn) – this will twist
the base of the cap into the correct
position for installation. Then, twist
the cap clockwise, closing it
normally.
NIf your cap still does not tighten
properly, it may be damaged or
broken; immediately stop use of the
unit and take it to your authorized
STIHL dealer for repair.
See also the "Fueling" chapter in your
Instruction Manual for additional
information.
Before Operation
Take off the chain guard (scabbard) and
inspect the chain saw for proper
condition and operation. (See the
maintenance chart near the end of the
instruction manual.)
WARNING
Always check your chain saw for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout, stop switch and cutting
attachment. The throttle trigger must
move freely and always spring back to
the idle position. The Master Control
Lever / stop switch must move easily to
STOP, 0 or †. Never attempt to modify
the controls or safety devices.
WARNING
Check fuel system for leaks, especially
the visible parts, e.g., filler cap, hose
connections, manual fuel pump (only for
chain saws equipped with a manual fuel
pump). Do not start the engine if there
are leaks or damage – risk of fire! Have
the chain saw repaired by a STIHL
servicing dealer before using it.
WARNING
Check that the spark plug boot is
securely mounted on the spark plug – a
loose boot may cause arcing that could
ignite combustible fumes and cause a
fire.
For proper assembly of the bar and saw
chain follow the procedure described in
the chapter "Mounting the Bar and
Chain" of your instruction manual.
STIHL Oilomatic saw chain, guide bar
and sprocket must match each other in
gauge and pitch. Before replacing any
bar and chain, see the chapter entitled
"Specifications" in the instruction
manual and the chapter "Reactive
Forces including Kickback".
Since longer bars add weight and may
be more difficult to control, select the
shortest bar that will meet your cutting
needs.
WARNING
Proper tension of the chain is extremely
important. In order to avoid improper
setting, the tensioning procedure must
be followed as described in your
manual. Always make sure the
hexagonal nut(s) for the sprocket cover
is (are) tightened securely after
tensioning the saw chain in order to
secure the bar. Never start the chain
saw with the sprocket cover loose.
Check chain tension once more after
having tightened the nut(s) and
thereafter at regular intervals (whenever
the saw is shut off). If the saw chain
becomes loose while cutting, shut off the
engine and then tighten. Never try to
adjust the saw chain while the engine is
running!
WARNING
After adjusting a saw chain, start the
chain saw, let the engine run for a while,
then switch engine off and recheck saw
chain tension. Proper saw chain tension
is very important at all times.
Left: Bottom of cap in closed posi-
tion – inner mark (1) in line
with outer mark.
Right: Bottom of cap in correct posi-
tion for installation – inner
mark is under the grip and
not in line with the outer
mark.
1
001BA238 KN
001BA239 KN