Stihl MS 461 R Owner Manual

Stihl MS 461 R Owner Manual


{ Instruction Manual


Guide to Using this Manual Safety Precautions

Mounting the depth limiter Adjusting Cutting Depth

Chain lubrication Tensioning the saw chain (depth limiter installed)

Checking the chain tension (depth limiter installed)

Maintaining and Sharpening the Saw Chain

Main Parts


2 2

3 3







English 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 { MS 461 R This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems.



Guide to Using this Manual

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.

Safety Precautions

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.

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Mounting the depth limiter

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).



5 2 4

Slide the depth limiter (3) onto the guard.

Fit the star knob screw (4) with washer (5).

Tighten down the screws (2).

3 4

N N Pull the depth limiter (3) forwards as far as stop.

Tighten down the star knob (4).

Adjusting Cutting Depth

English The cutting depth is infinitely variable from a few millimeters to about 20 cm.

Before adjusting the cutting depth: N N N Shut off the engine.

Engage the chain brake by pushing the hand guard (1) towards the bar nose – this locks the chain in position.

Place the chainsaw on the ground, put the heel of your right foot on the rear hand guard and press down.

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4 English N N N


Grip the handle on top of the depth limiter with your right hand and loosen the star knob (2) with your left hand.

Set the depth limiter to the required cutting depth (arrow) and tighten down the star knob (2) firmly.

Disengage the chain brake.

Chain lubrication

Adjusting the delivery rate



Tensioning the saw chain (depth limiter installed)

Shut off the engine.

N Wear work gloves to protect your hands.

1 2

N N Loosen the star knob (1).

Slide the depth limiter (2) back against the engine.

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.

4 3 3

N N N N N Loosen the nuts (3).

Hold the bar nose up.

Use a screwdriver to turn the tensioning screw (4) clockwise until the chain fits snugly against the underside of the bar.

While still holding the bar nose up, tighten down the nuts firmly.

Go to "Checking Chain Tension".

MS 461 R

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.


Checking the chain tension (depth limiter installed)

Shut off the engine.

N Wear work gloves to protect your hands.

1 2

N N English Check chain tension frequently – see chapter on "Operating Instructions" in instruction manual of basic chainsaw.

Adjust cutting depth.

N N Loosen the star knob (1).

Slide the depth limiter (2) back against the engine.

N 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.

If necessary, retension the chain.

A new chain has to be retensioned more often than one that has been in use for some time.

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Maintaining and Sharpening the Saw Chain

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 N Check the saw chain for cracks and damaged rivets 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

A + + C + B

Saw chain 36 RDR Cutter right A +10 B 0 C +15 left +10 0 -15 After sharpening N Depth gauge +40 0 0 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.

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Main Parts

16 15 13 14 1 4 2 3 6 5 7 # 9 8 12 26 28 10 11 17 18 19 27 23 21 20 22 25 24

1 2 3 4 Carburetor box cover twist lock Carburetor adjusting screws Spark plug boot Tool holder 5 6 7 8 Chain brake Chain sprocket Chain sprocket cover 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 MS 461 R 7



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.

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