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STIHL MS 461

Instruction Manual

Summary of Contents for MS 461 Rescue

Page 1: ...STIHL MS 461 Instruction Manual...

Page 2: ......

Page 3: ...Nikolas Stihl Guide to Using this Manual 2 Safety Precautions 3 Reactive Forces 8 Working Techniques 9 Cutting Attachment 18 Mounting the Bar and Chain 19 Tensioning the Chain 20 Checking Chain Tensio...

Page 4: ...achine 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...

Page 5: ...nufacturer before operating this power tool Intended use The machine may only be used to saw wood and wooden objects Do not use the machine for any other purpose risk of accidents Do not modify the ma...

Page 6: ...s chains chain sprockets and accessories They are specifically designed to match your model and meet your performance requirements Refuelling Switch off the engine before refuelling Never refuel the m...

Page 7: ...tart the engine start as described in the Instruction Manual During operation Ensure you always have a firm and safe footing Take special care when the bark is wet danger of slipping Always hold the c...

Page 8: ...ed by a STIHL servicing dealer if the saw chain still continues to move during idling Ensure proper ventilation when working in trenches hollows or other confined locations risk of fatal injury from b...

Page 9: ...e fuel Check fuel cap regularly for tightness Use only spark plugs that are in perfect condition and have been approved by STIHL see Specifications Check ignition lead insulation in good condition sec...

Page 10: ...firmly with both hands and maintain a secure grip Always cut at full throttle Be aware of the location of the guide bar nose Do not cut with the guide bar nose Be especially careful with small tough l...

Page 11: ...recognise the danger Use aids such as winches or draglines When felling close to roads rail lines power lines etc work with particular care If necessary notify police power companies or railway autho...

Page 12: ...rmation on a possible fire risk If on a slope stand on the uphill side of the log Watch out for rolling logs When working at heights Always use a lift bucket Never work on a ladder or in a tree Never...

Page 13: ...ck that there are no other persons in the felling area other than helpers Make sure no one is endangered by the falling tree the noise of your engine may drown any warning calls Maintain a distance of...

Page 14: ...atch out for falling limbs and watch the top of the tree Preparing work area at base of tree First clear the tree base and work area from interfering limbs and brush to provide a secure footing Clean...

Page 15: ...the planned direction of fall if necessary correct direction of fall by re cutting the felling notch Sapwood cuts Sapwood cuts in long fibered softwood help prevent sapwood splintering when the tree f...

Page 16: ...e cut the sight helps keep the hinge horizontal i e the same thickness all round To do this hold the plunge cutting sight parallel to the chord of the felling notch Felling wedges Make use of wedges a...

Page 17: ...lly at the same level as the felling cut B Large diameter trees Perform this felling cut when the tree diameter is greater than the length of the guide bar Shout a warning before starting the felling...

Page 18: ...cut Felling Cut with Holding Strap Leaner A Small diameter trees Perform this felling cut when the tree diameter is smaller than the length of the guide bar N Plunge the guide bar into the trunk unti...

Page 19: ...p 3 Do not cut into the holding strap Continue the felling cut on the other side of the trunk Make sure the second cut is at the same height as the first cut N Engage the spiked bumper behind the hing...

Page 20: ...ard with a chain scabbard that matches the cutting attachment If guide bars of different lengths are mounted to the saw always use a chain scabbard of the correct length which covers the complete guid...

Page 21: ...arp cutters N Fit the chain start at the bar nose N Fit the guide bar over the studs 1 the cutting edges on the top of the bar must point to the right N Engage the peg of the tensioner slide in the lo...

Page 22: ...has been in use for some time N Check chain tension frequently see chapter on Operating Instructions Your engine requires a mixture of gasoline and engine oil WARNING For health reasons avoid direct s...

Page 23: ...converter Mix Ratio STIHL 50 1 two stroke engine oil 50 parts gasoline to 1 part oil Examples N Use a canister approved for storing fuel Pour oil into canister first then add gasoline and mix thoroug...

Page 24: ...ap Filling up with fuel Take care not to spill fuel while fueling and do not overfill the tank STIHL recommends you use the STIHL filler nozzle for fuel special accessory N Fill up with fuel Closing G...

Page 25: ...BioPlus is recommended NOTICE Biological chain oil must be resistant to aging e g STIHL BioPlus since it will otherwise quickly turn to resin This results in hard deposits that are difficult to remov...

Page 26: ...e option N Close the filler cap There must still be a small amount of oil in the oil tank when the fuel tank is empty If the oil tank is still partly full the reason may be a problem in the oil supply...

Page 27: ...d guard is accelerated toward the bar nose even if your left hand is not behind the hand guard e g during felling cut The chain brake will operate only if the hand guard has not been modified in any w...

Page 28: ...powdered or drifting snow In case of erratic idling behavior or poor acceleration N Turn the low speed screw L 1 4 turn counterclockwise Whenever the low speed screw L has been adjusted it is usually...

Page 29: ...and squeeze the throttle trigger at the same time To select warm start n move the Master Control lever to cold start l first then push it into the warm start position n The change to warm start n is...

Page 30: ...legs just above the knees N Hold the front handle firmly with your left hand your thumb should be under the handle Cranking N Pull the starter grip slowly with your right hand until you feel it engag...

Page 31: ...ter Control lever to Choke shutter closed l if the engine is cold also use this position if the engine stopped when you opened the throttle after starting Starting throttle position n if the engine is...

Page 32: ...n chamber N Install the spark plug see Spark Plug N Set Master Control lever to n even if the engine is cold N Now start the engine During the break in period A factory new machine should not be run a...

Page 33: ...m thermal overload After finishing work N Slacken off the chain if you have retensioned it at operating temperature during work NOTICE Always slacken off the chain again after finishing work The chain...

Page 34: ...hain is changed to avoid uneven wear especially at the sprocket nose and on the bottom N Periodically clean the oil inlet hole 1 oil outlet channel 2 and bar groove 3 N Measure groove depth using the...

Page 35: ...extra ordinary conditions e g extremely wintry conditions of use such as powder snow or drift snow Rather unsuitable in very dusty conditions When dry STIHL filters attain a long service life N Always...

Page 36: ...peed It is therefore not possible to increase the maximum speed by further turning the high speed screw H in the clockwise direction making the mix leaner Standard setting N Switch off the engine N Ch...

Page 37: ...standard setting N Let the engine warm up N Turn the high speed adjusting screw H slightly clockwise leaner max up to the stop NOTICE After descending from a high altitude restore the carburetor setti...

Page 38: ...plug N Check electrode gap A and readjust if necessary see Specifications N Rectify the problems which have caused fouling of the spark plug Possible causes are Too much oil in fuel mix Dirty air filt...

Page 39: ...cket after use of two saw chains or earlier if the wear marks arrows are deeper than 0 5 mm otherwise the service life of the saw chain is reduced use check gauge special accessory to test Using two s...

Page 40: ...hain components and adapt these parts to the remaining parts in terms of shape and level of wear rework accordingly Carbide tipped Duro saw chains are especially wear resistant For an optimal sharpeni...

Page 41: ...TIHL filing gauge special accessory see table Sharpening tools a universal tool for checking sharpening and side plate angles depth gauge setting and tooth length as well as cleaning grooves and oil i...

Page 42: ...tance can be increased by up to 0 2 mm 0 008 Lowering the depth gauges The depth gauge setting is lowered when the cutter is sharpened N Check the depth gauge setting after each sharpening N Lay the a...

Page 43: ...uge Taper square file Sharpening set1 Inches mm mm Inches Part number Part number Part number Part number Part number 1 4P 6 35 3 2 1 8 5605 771 3206 5605 750 4300 0000 893 4005 0814 252 3356 5605 007...

Page 44: ...damaged as required Complete machine Visual inspection condition leaks X X Clean X Throttle trigger trigger lockout choke lever stop switch Master Control lever depending on version Check operation X...

Page 45: ...peration then every 150 hours of operation X Safety labels Replace X 1 STIHL recommends a STIHL servicing dealer 2 Firmly tighten down the cylinder base screws of professional saws 3 4 kW or more afte...

Page 46: ...STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses a...

Page 47: ...catcher 9 Chain tensioner 10 Bumper spike 11 Guide bar 12 Oilomatic saw chain 13 Oil filler cap 14 Muffler 15 Front hand guard 16 Front handle handlebar 17 Decompression valve 18 Starter grip 19 Fuel...

Page 48: ...ersonal protective equipment Noise and Vibration Data For further details on compliance with Vibration Directive 2002 44 EC see www stihl com vib Sound pressure level Lpeq to ISO 22868 Specifications...

Page 49: ...is machine may only carry out the maintenance and service work described in this user manual All other repairs must be carried out by a servicing dealer STIHL recommends that you have servicing and re...

Page 50: ...N ISO 11681 1 EN 55012 EN 61000 6 1 The measured and guaranteed sound power levels were determined according to Directive 2000 14 EC Annex V using the ISO 9207 standard Measured sound power level Guar...

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Page 52: ...www stihl com 04587730121A 0458 773 0121 A 0458 773 0121 A englisch G...

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