STIHL MS 461 R: This professional rescue saw combines power and precision for demanding rescue operations. Its special bar and carbide saw chain cut through thin metal sheets, tar paper, lightweight masonry, insulation material, roofing panels, and even glass. The depth limiter allows for precise cutting depths, making it ideal for creating return air openings in roofs and cladding structures during positive pressure ventilation.
STIHL MS 461 R: This professional rescue saw combines power and precision for demanding rescue operations. Its special bar and carbide saw chain cut through thin metal sheets, tar paper, lightweight masonry, insulation material, roofing panels, and even glass. The depth limiter allows for precise cutting depths, making it ideal for creating return air openings in roofs and cladding structures during positive pressure ventilation.
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STIHL MS 461 R
Instruction Manual
Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2017
0458-776-0121-A. VA2.A17.
0000006226_005_GB
MS 461 R
English
1
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This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
It has been built using modern
production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
Guide to Using this Manual 2
Safety Precautions 2
Mounting the depth limiter 3
Adjusting Cutting Depth 3
Chain lubrication 4
Tensioning the saw chain (depth
limiter installed) 4
Checking the chain tension (depth
limiter installed) 5
Maintaining and Sharpening the
Saw Chain 6
Main Parts 7
Disposal 8
MS 461 R
English
2
Symbols in text
WARNING
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
NOTICE
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
The -STIHL rescue saw is designed
specially for use in rescue service (e.g.
Fire Brigade, technical relief
organization, disaster control etc).
Only specially instructed and trained
personnel should be allowed to operate
the STIHL rescue saws in rescue
operations, because, apart from
handling the chainsaws, it is necessary
to estimate the circumstances and
dangers.
Using the STIHL Rescue Saws requires
special working techniques. Failure to
observe them can be fraught with
increased danger of accident for the
user or the person to be rescued.
This instruction manual supplements the
standard instruction manual for the basic
chainsaws. It describes where it differs
from the standard instruction manual.
Please read both instruction manuals
carefully, before commissioning the
equipment.
Failure to observe the safety instructions
can be fatal.
Filling fuel constitutes a fire hazard.
The special bar and chain (carbide saw
chain) cuts thin metal sheets, tar paper,
lightweight masonry, insulation material,
roofing panels, glass (e.g. ICE
windows), nails etc.
Use dust protection or respirator to
protect from cutting dust and glass dust.
Do not fail to put on personal protective
hear, as described in this instruction
manual, before starting work. Also wear
additional face shield and protective
goggles.
Flying splintered parts increase the risk
of injury. They can have sharp edges
and their high density gives them higher
kinetic energy than wooden splinters.
The cut depth limiter allows fire fighters
to precisely place return air openings in
roofs and cladding structures in positive
pressure ventilation.
The special application-related
functioning of the rail head can pose a
higher kickback risk.
In every separation procedure, take into
consideration the statics of the
separated construction; when working
on the roof ensure that neither the
person nor the roof structure collapses.
Another application is searching for
sources of fire, especially in smoldering
roofs of industrial and commercial
buildings.
The HD2 filter ensures excellent filtering
performance even under extreme
conditions in rescue operations.
Guide to Using this Manual Safety Precautions
MS 461 R
English
3
N Mount the bar and chain – see
instruction manual of basic
chainsaw.
N Push the guard (1) over the guide
bar and fit the screws (2).
N Slide the depth limiter (3) onto the
guard.
N Fit the star knob screw (4) with
washer (5).
N Tighten down the screws (2).
N Pull the depth limiter (3) forwards as
far as stop.
N Tighten down the star knob (4).
The cutting depth is infinitely variable
from a few millimeters to about 20 cm.
Before adjusting the cutting depth:
N Shut off the engine.
N Engage the chain brake by pushing
the hand guard (1) towards the bar
nose – this locks the chain in
position.
N Place the chainsaw on the ground,
put the heel of your right foot on the
rear hand guard and press down.
Mounting the depth limiter
3
2
4
5
3443BA030 KN
3
4
3443BA031 KN
Adjusting Cutting Depth
MS 461 R
English
4
N Grip the handle on top of the depth
limiter with your right hand and
loosen the star knob (2) with your
left hand.
N Set the depth limiter to the required
cutting depth (arrow) and tighten
down the star knob (2) firmly.
N Disengage the chain brake.
Adjusting the delivery rate
N Turn adjusting screw (on the bottom
of the machine) to the right as far as
it will go = maximum delivery rate
Chain lubricant
Because of the anticipated long periods
of disuse, a partly synthetic chain
lubricant, e. g., STIHL Chain and Bar
Lubricant.
N Shut off the engine.
N Wear work gloves to protect your
hands.
N Loosen the star knob (1).
N Slide the depth limiter (2) back
against the engine.
N Loosen the nuts (3).
N Hold the bar nose up.
N Use a screwdriver to turn the
tensioning screw (4) clockwise until
the chain fits snugly against the
underside of the bar.
N While still holding the bar nose up,
tighten down the nuts firmly.
N Go to "Checking Chain Tension".
3443BA032 KN
2
Chain lubrication
147BA012 KN
E
Tensioning the saw chain
(depth limiter installed)
1
3443BA033 KN
2
3
3
4
3443BA034 KN
MS 461 R
English
5
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions" in instruction manual of
basic chainsaw.
N Shut off the engine.
N Wear work gloves to protect your
hands.
N Loosen the star knob (1).
N Slide the depth limiter (2) back
against the engine.
N The chain must fit snugly against
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand when the
chain brake is released.
N If necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions" in instruction manual of
basic chainsaw.
N Adjust cutting depth.
Checking the chain tension
(depth limiter installed)
1
3443BA033 KN
2
3443BA035 KN
MS 461 R
English
6
Never use a dull or damaged saw chain
– this leads to increased physical strain,
increased vibration load, unsatisfactory
cutting results and increased wear.
N Clean the saw chain
N Check the saw chain for cracks and
damaged rivets
N Replace damaged or worn chain
components and adapt these parts
to the remaining parts in terms of
shape and level of wear – rework
accordingly
WARNING
Compliance with the angles and
dimensions listed below is absolutely
necessary. An improperly sharpened
saw chain – especially depth gauges
that are too low – can lead to increased
kickback tendency of the chain saw –
risk of injury!
Saw chain 36 RDR
A Sharpening angle 15°
B Side plate angle 85°
To sharpen the carbide-tipped saw
chain, use only the USG universal
sharpener with a diamond wheel. When
doing so, proceed according to the USG
Instruction Manual.
The angles must be identical for all
cutters in the saw chain. Varying angles:
Rough, uneven running of the saw
chain, increased wear – even to the
point of saw chain breakage.
All cutters must be equally long.
With varying cutter lengths, the cutter
heights also vary and cause rough
running of the saw chain and chain
breakage.
N All cutters must be ground down
equal to the length of the shortest
cutter
Depth gauge setting
The depth gauge determines the chip
thickness.
a Required distance between depth
gauge and cutting edge (0.65 mm)
Lowering the depth gauges
The depth gauge setting is lowered
when the cutter is sharpened.
N Check the depth gauge setting after
each sharpening and grind with the
USG
Settings on the USG sharpener
Saw chain 36 RDR
After sharpening
N Clean the saw chain thoroughly,
removing any chips or dust –
lubricate the saw chain thoroughly
N In the event of extended periods of
disuse, store saw chains in cleaned
and oiled condition
Repair
The saw chain can be repaired with
NG 3, NG 4, NG 5 and NG 7.
With the saw chain 36 RDR, cutters, tie
straps, 3
-
humped drive links, and drive
links can be unriveted and riveted.
Maintaining and Sharpening
the Saw Chain
Cutter Depth gauge
right left
A +10 +10 +40
B0 0 0
C+15 -15 0
-
+
-
-
A
B
C
523BA077 KN
+
+
MS 461 R
English
7
1 Carburetor box cover twist lock
2 Carburetor adjusting screws
3 Spark plug boot
4 Tool holder
5 Chain brake
6 Chain sprocket
7 Chain sprocket cover
8 Chain tensioner
9 Spiked bumper
10 Guide bar
11 Oilmatic saw chain
12 Chain catcher
13 Shield
14 Oil filler cap
15 Muffler
16 Front hand guard
17 Front handle (handlebar)
18 Decompression valve
19 Starter grip
20 Fuel filler cap
21 Master Control lever
22 Throttle trigger
23 Throttle trigger lockout
24 Rear handle
25 Rear hand guard
26 Depth limiter
27 Star knob screw
28 Handle
# Serial number
Main Parts
18
28
5
12
24
27
#
6
8
9
1
2
3
4
11
10
7
14
15
16
17
19
20
21
22
23
25
13
3443BA036 KN
26
MS 461 R
English
8
Observe all country-specific waste
disposal rules and regulations.
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environment-
friendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
Disposal
000BA073 KN
www.stihl.com
*04587760121A*
0458-776-0121-A
0458-776-0121-A
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STIHL MS 461 R: This professional rescue saw combines power and precision for demanding rescue operations. Its special bar and carbide saw chain cut through thin metal sheets, tar paper, lightweight masonry, insulation material, roofing panels, and even glass. The depth limiter allows for precise cutting depths, making it ideal for creating return air openings in roofs and cladding structures during positive pressure ventilation.
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