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STIHL GS 461

1. 2411BA016 KN Switch off the engine Diamond abrasive chain can sag a maximum of a 15 mm e Retension diamond abrasive chain if necessary see Tensioning the diamond abrasive chain If the diamond abrasive chain sags too much this leads to significantly increased wear of the cutting attachment A new diamond abrasive chain must be retensioned more frequently than one that has been in use already for an extended period Check chain tension frequently see Operating Instructions 13 English Fuel Your engine requires a mixture of gasoline and engine oil warnine For health reasons avoid direct skin contact with gasoline and avoid inhaling gasoline vapor STIHL MotoMix STIHL recommends the use of STIHL MotoMix This ready to use fuel mix contains no benzol or lead has a high octane rating and ensures that you always use the right mix ratio STIHL MotoMix uses STIHL HP Ultra two stroke engine oil for an extra long engine life MotoMix is not available in all markets Mixing Fuel Eene Unsuitable fuels or lubricants or mix ratios other than those specified may result in serious damage to the engine Poor quality gasoline or engine oil may damage the engine sealing rings hoses and the fuel tank Gasoline Use only high quality brand name gasoline with a minimum octane rating of 90 leaded or unleaded 14 If your machine is equipped with a catalytic converter you
2. lt a 7 DI E FD per 7 als ras E Qt 2411BA022 KN With the right hand pull the starter There must not be anyone within the lever grip slowly until you feel it engage swivel range of the concrete cutter and then give it a brisk strong pull Position cold start simultaneously press down on the handlebar do not pull the starter rope out all the way risk of breakage Do not let the starter grip snap back guide it vertically back Position warm start into the housing so that the starter rope can rewind properly If engine is cold even if the engine has stalled during opening of throttle after starting If engine is warm once the engine has been running for approx one minute Starting the concrete cutter ing Hold and start the concrete cutter Before starting open the shut off valve completely and ensure a supply of water to the diamond abrasive chain do not allow diamond abrasive chain to run dry 18 GS 461 When the engine has turned over for the first time 2411BA026 KN Move the Master Control lever 1 to the position warm start JA e Press the button on the decompression valve Hold and continue cranking the concrete cutter Once the engine is running z x n SI Ea ao x Blip the throttle trigger 2 the Master Control lever 1 jumps to run I and the engine begins to idle The concrete cutter is now
3. g when cutting composite materials wear respiratory protection Wear sturdy protective gloves made of a resist ant material e g leather STIHL can supply a comprehensive range of personal protective clothing and equipment Transporting the machine Always stop the engine and attach the chain scabbard Carry the machine only by the top handle guide bar towards the rear with the hot muffler facing away from the body Do not touch hot device parts in particular the muffler surface risk of burns In vehicles Properly secure the machine to prevent turnover fuel spillage and damage Refuelling Petrol is an extremely flammable fuel keep clear of naked flames and fire do not spill any fuel no smoking Switch off the engine before refuelling Never refuel the machine while the engine is still hot the fuel may spill over risk of fire Open the fuel filler cap carefully so that any excess pressure is relieved gradually and fuel does not splash out The machine may only be refuelled in a well ventilated place If fuel has been spilled clean immediately the engine driven device prevent your clothes from being contaminated with fuel otherwise change clothes at once Dust may collect on the engine unit especially around the carburetor If dust gets mixed with fuel risk of fire Remove the dust from the engine unit regularly Look out for leaks Never start the
4. machine serviced by a servicing dealer before using it functional front hand guard Check chain sprocket Sprocket nose moves easily Correctly mounted guide bar GS 461 The diamond abrasive chain must be suitable for the material to be cut It must be in good condition and fitted correctly direction of running Correctly tensioned diamond abrasive chain Both the accelerator lever and its locking to move smoothly the accelerator lever has automatically to return to its idle run position Master control lever can be moved to STOP or 0 Check that the spark plug boot is secure A loose boot can lead to flying sparks which may ignite the escaping fuel air mixture risk of fire Never attempt to modify the controls or safety devices in any way Keep the handles dry and clean free from oil and dirt important for safe control of the concrete cutter The concrete cutter should only be used if it is in full working order risk of accident Starting the engine Move at least 3 meters away from the place at which the machine was refueled and never start the machine in enclosed spaces The machine may only be used on level ground Ensure a firm and secure footing and hold the machine firmly The diamond abrasive chain must not touch any objects or the ground and must not be in the cut because it may begin to rotate when the machine is started GS 461 The eng
5. Air filter Replace x GS 461 27 English The following information applies under normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions 5 g extensive dust etc 2 x 5 8 o x 2 o 2 amp 3 s s g 2 2 n gt 5 2 o MEME eg S s gt 2 2 83 5 5 3 3 2 a Zs gt 2 Check X X Anti vibration elements Have them replaced by a servicing dealer X Cooling air intake slits Clean x Cylinder fins Clean x x Check idle adjustment chain must not rotate x x Carburetor Set idle speed X Adjust electrode gap X Spark plug Replace after 100 hours operation All accessible screws nuts and bolts not adjusting Retighten x screws Have checked by a specialist dealer x Spark arresting screen present only in some countries Have cleaned by a specialist dealer or replaced x if necessary decarbonise after 139 hours of operation subse Exhaust bore x quently after every 150 hours of operation Safety information label Replace x 1 STIHL recommends STIHL servicing dealers 2 During initial use tighten the cylinder block screws after 10 to 20 hours of operation 3 If diamond abrasive chain is mounted or changed 28 GS 461 Minimize Wear and Avoid Damage Observing the instructions in this manual helps reduce the risk
6. beyond repair Position the left locating hole 5 over the peg of the tensioner slide simultaneously place the diamond abrasive chain over the sprocket wheel 3 Turn screw 4 to the right until there is very little diamond abrasive chain sag on the underside of the bar and the lugs of the drive links engage in the bar groove Refit the chain sprocket cover and then screw on the nuts by hand until they are fingertight e Goto chapter Tensioning the diamond abrasive chain GS 461 Tension diamond abrasive chain 2411BA0015 KN For retensioning during operation Switch off the engine Put on protective gloves Loosen nuts Raise the guide bar at the nose Use the screwdriver to turn the screw 1 to the right until the distance a approx 5 mm If the distance a approx 5 mm cannot be set due to an elongated diamond abrasive chain move guide bar see installing guide bar and diamond abrasive chain Raise the guide bar further and tighten the nuts securely GS 461 Z x Ce x re 2 a Check tension of diamond abrasive chain diamond abrasive chain can be pulled across the guide bar by hand A new diamond abrasive chain must be retensioned more frequently than one that has been in use already for an extended period Check chain tension frequently see Operating Instructions English Check tension of diamond abrasive chain
7. heavy signs of wear also replace the clutch drum 3 Installing rim sprocket e Fit rim sprocket 2 Fit cap 1 Replacing clutch drum zZ x a amp lt ao 5 A Remove cap 1 Remove rim sprocket 4 Use a screwdriver to remove the E clip 2 Remove washer 3 Remove clutch drum 5 with needle cage 6 from the crankshaft 25 English Installing the clutch drum Clean crankshaft stub and needle cage and lubricate with STIHL lubricant special accessory Slip the needle cage onto the crankshaft stub Fit clutch drum e Fit rim sprocket Refit washer and E clip on the crankshaft e Fit cap 26 Maintain and sharpen diamond abrasive chain Maintaining the diamond abrasive chain After finishing work Remove diamond abrasive chain and guide bar e Rinse diamond abrasive chain and guide bar with water Dry diamond abrasive chain and guide bar Spray diamond abrasive chain and guide bar with STIHL multispray in particular the bearing of the sprocket nose corrosion protection Check diamond abrasive chain regularly Check the diamond abrasive chain for cracks and damaged rivets Replace damaged or worn chain components contact a servicing dealer Never use a dull or damaged diamond abrasive chain this leads to increased physical strain increased vibration load unsatisfactory results and increased wear If cutting performance begins to deteriora
8. ready for use At very low temperatures Let the engine warm up briefly with the throttle slightly open GS 461 Switch off the engine e Set master control lever to STOP or 0 If the engine does not start The Master Control lever was not returned to its warm start position in time when the engine turned over for the first time and has now flooded Remove the spark plug see Spark plug e Dry the spark plug e Set master control lever to STOP or 0 Crank the engine several times with the starter to clear the combustion chamber Reinstall the spark plug see Spark plug e Setthe Master Control lever to warm start x even if the engine is cold Restart the engine Wet filter e Dry wet filter if necessary do not expose to extreme heat Ifthe filter is very dirty clean the filter thoroughly see Cleaning the air filter English Operating Instructions During the break in period A factory new machine should not be run at high revs full throttle off load for the first three tank fillings This avoids unnecessarily high loads during the break in period As all moving parts have to bed in during the break in period the frictional resistances in the shortblock are greater during this period The engine develops its maximum power after about 5 to 15 tank fillings During work caution Always work with water caution Do not make the mixture leaner to ac
9. to avoid uneven wear especially at the sprocket nose and on the bottom Periodically clean the water inlet hole 1 water outlet channel 2 and bar groove 3 Measure groove depth using the measuring tool on the file gauge special accessory in the area with the greatest wear If the groove is not at least 6 mm deep Replace guide bar Otherwise the drive links will grind against the base of the groove tie straps will not lie against the bar If the guide bar runs in the cut GS 461 Check guide bar for uneven wear ridge offset Checking and Replacing the Flip the guide bar if necessary Chain Sprocket remove the bore of the guide bar Remove chain sprocket cover with guide bar straightener diamond abrasive chain and guide bar Replacing rim sprocket A amp o 3 lt ao N Ifthe diamond abrasive chain is being replaced also replace the rim sprocket Ifthe wear marks arrows are deeper than 0 5 mm otherwise the service life of the diamond abrasive chain is reduced use check gauge special accessory to test Using two diamond abrasive chains in alternation helps preserve the chain sprocket Removing rim sprocket If only the rim sprocket is removed the clutch drum does not need to be removed GS 461 English z amp 2 a Remove cap 1 Remove rim sprocket 2 Inspect transport profile on the clutch drum 3 if there are also
10. 11BA013 KN e Fit the diamond abrasive chain starting at the nose of the guide bar 8 lt m Position the guide bar over the bolts 1 align drive links so that the position lines up with the symbol arrow d warnine If the drive links are not directionally aligned one behind the other correctly the diamond abrasive chain and chain sprocket will be damaged beyond repair 12 Position the right locating hole 2 over the peg of the tensioner slide simultaneously place the diamond abrasive chain over the sprocket wheel 3 Turn screw 4 to the right until there is very little diamond abrasive chain sag on the underside of the bar and the lugs of the drive links engage in the bar groove Refit the chain sprocket cover and then screw on the nut by hand until it is fingertight e Go to chapter Tensioning the diamond abrasive chain Moving the guide bar Only move the guide bar if the diamond abrasive chain cannot be tensioned properly Removing the chain sprocket cover Remove guide bar with diamond abrasive chain e Fit the diamond abrasive chain starting at the nose of the guide bar Position the guide bar over the bolts 1 align drive links so that the position lines up with the symbol arrow warnine If the drive links are not directionally aligned one behind the other correctly the diamond abrasive chain and chain sprocket will be damaged
11. 11BA019 KN e Drain the fuel tank Pull the fuel pickup body out of the tank with a hook and disconnect it from the hose Connect a new fuel pickup body to the hose e Return the fuel pickup body to the tank 16 Starting Stopping the Engine The four positions of the Master Control lever z lt oO lt a a STOP or 0 engine off ignition is switched off Run I engine is running or can start Warm start JN this position is for starting the warm engine Cold start this position is for starting the cold engine Adjusting the Master Control lever The throttle trigger lockout and throttle trigger must be pressed simultaneously to adjust the Master Control lever from run I to cold start M To set the Master Control lever to warm start first set it to cold start then push the Master Control lever into the warm start x position Changing to warm start x is only possible from the cold start position When the throttle trigger is squeezed the Master Control lever returns from warm start x to run I To switch off the engine set the master control lever to STOP or 0 Position cold start M4 Ifthe engine is cold Ifthe engine stalls during opening of throttle after starting Ifthe fuel tank has run empty engine stalled out Position warm start If engine is warm once the engine has been running for approx one minute When the en
12. Check fuel cap regularly for tightness Use only spark plugs that are in perfect condition and have been approved by STIHL see Specifications Inspect ignition lead insulation in good condition secure connection Check that the muffler is in perfect working condition Do not use the machine if the muffler is damaged or missing risk of fire Hearing damage Never touch a hot muffler risk of burns The condition of the antivibration elements influences vibration behavior inspect antivibration elements periodically Switch off the engine to check the chain tension to retension the chain to change chains for remedying malfunctions GS 461 Sample applications Use diamond abrasive chain only with water Connect concrete cutter to water supply network min 1 5 bar The water introduced is used to cool the diamond abrasive chain and rinse the cutting attachment and for binding dust After finishing work run the concrete cutter for a few seconds with water and at operating speed to rinse the cutting attachment If the water pressure or water volume is too low this leads to significantly increased wear and irreparable damage to the cutting attachment danger of breakage Objects to be cut Must be fully supported Must be secured so it cannot roll or slip off Must be prevented from vibrating Severed parts With openings recesses etc the sequ
13. STIHL STIHL GS 461 instruction Manual ROLLOMAMES L TIHE AO Original Instruction Manual Printed on chlorine free paper ANDREAS STIHL AG amp Co KG 2014 0458 761 0121 A VA6 L14 0000006258_010_GB Printing inks contain vegetable oils paper can be recycled Contents Guide to Using this Manual Safety Precautions and Working Techniques Sample applications Cutting Attachment Mount guide bar and diamond abrasive chain Tension diamond abrasive chain Check tension of diamond abrasive chain Fuel Fueling Starting Stopping the Engine Operating Instructions Air Filter System Remove air filter Cleaning the Air Filter Adjusting the Carburetor Spark Arresting Screen in Muffler Spark Plug Rewind Starter Storing the Machine Taking Care of the Guide Bar Checking and Replacing the Chain Sprocket Maintain and sharpen diamond abrasive chain Maintenance and Care Minimize Wear and Avoid Damage Main Parts Specifications Maintenance and Repairs STIHL GS 461 11 13 13 14 15 16 19 20 20 21 21 22 23 24 24 24 25 26 27 29 30 31 32 Disposal EC Declaration of Conformity 32 32 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 Pl
14. air mixture under most operating conditions With this carburetor it is only possible to correct the adjusting screws within fine limits The ignition module limits maximum engine speed Therefore maximum engine speed cannot be increased by turning the high speed screw H any further clockwise leaner Standard Setting Shut off the engine Check the air filter and clean or replace if necessary Check the spark arresting screen not in all models country specific in the muffler and clean or replace if necessary English z x S lt ao n Ri o gt Turn high speed screw H counterclockwise as far as stop no more than 3 4 turn Turn the low speed screw L clockwise as far as stop then turn it back 1 4 turn Adjusting Idle Speed Before starting open the shut off cock fully so that water flows to the diamond abrasive chain never allow chain to run dry e Carry out the standard setting Start and warm up the engine zZ x SI 2 S lt a G x 21 English Engine stops while idling or chain runs while engine is idling e Turn the idle speed screw LA clockwise as far as stop or until the chain begins to run then turn the screw back 1 1 2 turns warnine If the chain continues moving when the engine is idling have your machine checked and repaired by your servicing dealer Erratic idling behavior poor acceleration even though low speed scr
15. ct accessories and packaging to an approved disposal site for environment friendly recycling Contact your STIHL servicing dealer for the latest information on waste disposal EC Declaration of Conformity ANDREAS STIHL AG amp Co KG Badstr 115 D 71336 Waiblingen hereby confirms that Model Concrete cutter Make STIHL Type GS 461 Serial identification number 4252 Displacement 76 5 cm conform to the specifications of Directives 2006 42 EC and 2004 108 EG and have been developed and built in compliance with the versions of the following standards valid at the time of the production date EN ISO 12100 EN 55012 EN 61000 6 1 The technical documentation has been retained by ANDREAS STIHL AG amp Co KG Product approval The year of construction and the serial number are shown on the machine Waiblingen 20 08 2014 ANDREAS STIHL AG amp Co KG p P ue m Ss Thomas Elsner Head of Product Group Management GS 461 English CE GS 461 33 0458 761 0121 A englisch 458 761 0121 A
16. dent No smoking when working with or near the machine risk of fire Combustible fuel vapour may escape from the fuel system Examine the diamond abrasive chain periodically at short intervals check that they are not cracked chipped check also that there are no damaged or missing segments signs of overheating discoloration Never use diamond abrasive chains that are cracked or have chipped segments Contact your servicing dealer In the event of noticeable changes in cutting behavior e g increased vibration reduced cutting performance stop work and eliminate the causes of the changes Switch off the engine and wait until the diamond abrasive chain is stationary Check condition and correct tension of diamond abrasive chain Check sharpness Never touch the diamond abrasive chain when the motor is running If the diamond abrasive chain becomes jammed by an object switch off the engine immediately before attempting to remove the object risk of injury To change the diamond abrasive chain switch off the engine risk of injury If the machine 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 refer also to the section Before starting Check the fuel system for leaks and make sure the safety devices are working properly Never continue using a power tool that is not in perf
17. e www stihl com vib Sound pressure level Lpeq to ISO 11201 105 dB A Sound power level Lweq to ISO 11201 115 dB A Vibration level a eq to ISO 19432 Handle Handle left right GS 461 4 5 m s 4 0 m s The K factor in accordance with Directive 2006 42 EC is 2 5 dB A for the sound pressure level and sound 31 English Maintenance and Repairs Users of this 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 repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information When repairing the machine only use replacement parts which have been approved by STIHL for this power tool or are technically identical Only use high quality replacement parts in order to avoid the risk of accidents and damage to the machine STIHL recommends the use of original STIHL replacement parts Original STIHL parts can be identified by the STIHL part number the STIHL logo and the STIHL parts symbol 67 the symbol may appear alone on small parts 32 Disposal Observe all country specific waste disposal rules and regulations A x n n lt a e STIHL products must not be thrown in the garbage can Take the produ
18. ease contact your dealer or our sales company if you have any queries concerning this product Your ha Dr Nikolas Stihl This instruction manual is protected by copyright All rights reserved especially the rights to reproduce translate and process with electronic systems English Guide to Using this Manual Pictograms Pictograms that appear on the machine are explained in this Instruction Manual Depending on the machine and equipment version the following pictograms may appear on the machine Fuel tank fuel mixture of gasoline and engine oil mi En Direction of chain travel Tension diamond abra VA sive chain Actuate decompression valve Water connection shut off cock Symbols in text A warnine Warning where there is a risk of an accident or personal injury or serious damage to property Elore 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 and Working Techniques Because the chain of a concrete cutter runs at very high speeds spe cial safety precautions must be observed to reduce the risk of per sonal injury It is i
19. ect working order In case of doubt have the unit checked by your servicing dealer Check for correct idling so that the diamond abrasive chain stops moving when the throttle trigger is released Check and or correct the idle setting regularly Have the machine repaired by a STIHL servicing dealer if the diamond abrasive chain continues to run nevertheless Reactive forces The most frequently occurring reactive forces are pull in and pushback Pull in A 2411BA001 KN When the diamond abrasive chain on the bottom of the guide bar overbucking is jammed or encounters a solid object the concrete cutter may suddenly be drawn forward to the workpiece Pushback B z x SI o lt a When the diamond abrasive chain on the top of the guide bar underbucking is jammed or encounters a solid object the concrete cutter may suddenly be driven straight back toward the operator GS 461 002BA146 KN Do not allow the guide bar to become jammed Always be aware that the object to be cut may move and other factors may cause the cut to close and jam the diamond abrasive chain The object to be cut must be secured and supported so that the cut remains open during and after cutting Do not twist the guide bar in the cut Working parting off grinding Ensure sufficient water supply to diamond abrasive chain do not allow diamo
20. ence of the cuts is important Always make the last cut so that the diamond abrasive chain does not become jammed and so that the operator is not endangered by the severed or separated part GS 461 If necessary use wedges and if necessary leave small ridges that hold the part that is to be separated in position Break these ridges later Before finally separating the part determine how heavy the part is how it can move after separation whether it is under tension When breaking out the part do not endanger assistants Plunge cutting Begin cutting with the concrete cutter at full throttle PA amp 3 lt a 1 Apply the lower portion of the guide bar nose 2 Swing slowly into the plunge cutting position 3 Make the plunge cut very carefully When making the plunge cut into existing narrower joints proceed with extreme care English Cut in several passes A Mark cutting line A Work along the cutting line When making corrections do not tilt the diamond abrasive chain always reposition it afresh 2411BA005 KN PA x 9 e lt a A English Cutting round and hollow bodies Shaping pipe always position it anew instead if necessary use wedges and if necessary leave small ridges that hold the part that is to be separated in position Break these ridges later 2411BA007 KN 180BA007 KN Secure pipes round bodies etc Secure pip
21. engine if fuel has been spilled or is leaking Fatal burns may result Bayonet filler cap Never use a tool to open or close the bayonet filler cap The cap can be damaged and fuel may escape Secure the bayonet filler cap tightly after refueling Diamond abrasive chain The diamond abrasive chain guide bar and chain sprocket must match each other and your concrete cutter Use only approved diamond abrasive chains If unauthorized chains are used aggressive cutting cannot be ruled out This may lead to uncontrolled and exceedingly dangerous reaction forces kickback in the machine risk of fatal injuries Only use diamond abrasive chain for the specified materials observe diamond abrasive chain codes Always cut with water Before fitting used diamond abrasive chains check that they are not cracked chipped check also that there are no damaged or missing segments signs of overheating discoloration Never use diamond abrasive chains that are cracked or have chipped segments Contact your servicing dealer Before starting Check that concrete cutter is properly assembled and in good condition refer to appropriate chapters in the Instruction Manual Check the fuel system for leaks especially the visible parts e g filler cap hose connections manual fuel pump only in machines with a manual fuel pump In case of leakage and damage do not start the engine risk of fire Have the
22. es round bodies etc against rolling away against rolling away Mark a cutting line when Mark a cutting line when determining the cutting line avoid determining the cutting line avoid reinforcement especially in the reinforcement especially in the direction of the severing cut direction of the severing cut Make the plunge cut very carefully A DANGER Feed with full cutting depth along the cutting line for small Manual cutting along this line requires corrections of direction do not tilt particular caution and precision the diamond abrasive chain but always position it anew instead if necessary use wedges and if necessary leave small ridges that hold the part that is to be separated in position Break these ridges later e lt a A Cut into pipes round bodies etc in the area at the ends of the cutting line so that the material does not break away Make the plunge cut very carefully at the apex and cut outward on both sides feed with full cutting depth along the cutting line for small corrections of direction do not tilt the diamond abrasive chain but 10 GS 461 Cutting Attachment Diamond abrasive chain guide bar and chain sprocket make up the cutting attachment The cutting attachment that is supplied has been optimized for the concrete cutter z x D e gt lt a A The pitch t of the diamond abrasive chain 1 chain sprocket and sp
23. ew is open 1 4 turn ei lt a n Idle setting is too lean Turn the low speed screw L counterclockwise until the engine runs and accelerates smoothly It is usually necessary to change the setting of the idle speed screw LA after every correction to the low speed screw L Fine Tuning for Operation at High Altitude A slight correction of the setting may be necessary if engine does not run satisfactorily 22 Carry out the standard setting Warm up the engine Turn high speed screw H slightly clockwise leaner no further than stop amp uonce After returning from high altitude reset the carburetor to the standard setting If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating Spark Arresting Screen in Muffler In some countries the muffler is fitted with a spark arresting screen f engine performance deteriorates check the spark arresting screen in the muffler Let the muffler cool down 3443BA009 KN Remove four screws Remove exhaust casing 1 of the muffler 3443BA010 KN Bend back the retaining lugs 2 Pull out spark arresting screen 3 Clean the dirty spark arresting screen replace if damaged or heavily carbonized Refit the spark arresting screen in reverse o
24. f slipping on ice water snow or uneven ground Don not work while standing on a ladder not at unstable places not over your shoulder height not with one hand only risk of accident Keep clear the working area bear in mind obstacles holes and pitches Never work alone stay always in earshot to other persons who can render first aid in case of emergency More care and attention than usual are required when wearing ear protection warning sounds shouts alarms etc cannot be heard properly Take a break in good time to avoid tiredness or exhaustion risk of accidents Keep easily combustible materials away from hot exhaust gases and hot mufflers risk of fire Mufflers with catalytic converters can become especially hot English Your power tool produces toxic exhaust fumes as soon as the engine is running These gases may be colorless and odorless and may contain unburnt hydrocarbons and benzene Never work with the engine driven device in closed or poorly vented rooms even not with devices equipped with a catalyst Ensure proper ventilation when working in trenches hollows or other confined areas Toxic fumes can kill With sick feeling headache eye defect for example shrinking field of vision hearing impairment dizziness fading powers of concentration stop working immediately such symptoms may be caused among others by high exhaust gas concentration risk of acci
25. gine has fired for the first time After ventilation of the combustion chamber if the engine was flooded GS 461 Connect concrete cutter to water supply network z x n A o lt a Connect concrete cutter to water supply network min 1 5 bar e Before starting open shut off valve arrow completely Hold concrete cutter There are two ways to hold the concrete cutter during starting GS 461 English On the ground Between the knees or thighs z 3 a 2 lt ao gt 3 S e Place the concrete cutter securely Clamp the rear handle between the on the ground assume a steady knees or thighs stance the diamond abrasive chain must not touch any objects or the ground Grip the handlebar firmly with the left hand thumb wrapped around the handlebar Press the concrete cutter firmly against the ground holding the front handle with your left hand thumb wrapped round the handle Place your right foot into the rear handle 17 English Starting Decompression valve z 2 amp 2 a Press the button the decompression valve will be opened The decompression valve is closed automatically when the engine fires for the first time For this reason press the button again before each additional starting attempt Simultaneously press the throttle diner trigger lockout 2 and throttle trigger 3 set the master control zZ x
26. glect or deficient maintenance e g air and fuel filters incorrect carburetor adjustment or inadequate cleaning of cooling air inlets intake ports cylinder fins Corrosion and other consequential damage resulting from improper storage Damage to the machine resulting from the use of poor quality replacement parts Parts Subject to Wear and Tear Some parts of the power tool are subject to normal wear and tear even during regular operation in accordance with instructions and depending on the type and duration of use have to be replaced in good time Among other parts this includes Diamond abrasive chain guide bar Drive components clutch clutch drum chain sprocket Filters air fuel Rewind starter Spark plug Components of antivibration system English 29 English Main Parts Twist lock Spark plug boot Carburetor adjusting screws Water connection shut off cock Chain sprocket cover Chain sprocket Chain tensioner Guide bar 9 Diamond abrasive chain 10 Muffler 11 Front hand guard 12 Front handle handlebar 13 Decompression valve 14 Starter grip 15 Fuel filler cap 16 Master Control lever 17 Throttle trigger 18 Throttle trigger lockout 19 Rear handle 20 Rear hand guard Serial number M O O1 BB ND ren O O u O 2411BA043 KN 30 GS 461 Specifications Engine STIHL si
27. hieve an apparent increase in power this could damage the engine see Adjusting the Carburetor Check chain tension frequently The diamond abrasive chain stretches and begins to sag The drive links on the underside of the bar must not come out of the bar groove by more than 15 mm the diamond abrasive chain may otherwise jump off the bar retension the diamond abrasive chain see Tensioning the diamond abrasive chain 19 English If the diamond abrasive chain sags too much this leads to significantly increased wear of the diamond abrasive chain and chain sprocket retension the diamond abrasive chain see Tensioning the diamond abrasive chain A new diamond abrasive chain must be retensioned more frequently than one that has been in use already for an extended period After a long period of full throttle operation After a long period of full throttle operation allow engine to run for a while at idle speed so that the heat in the engine can be dissipated by flow of cooling air This protects engine mounted components ignition carburetor from thermal overload After finishing work Short term storage Wait for engine to cool down Keep the machine with a full tank of fuel in a dry place well away from sources of ignition until you need it again Clean and dry guide bar and diamond abrasive chain and spray with STIHL multispray in particular the bearing of the sprocket nose cor
28. ine driven device is operated by a single person only do not allow any person to stay within the working area nor with starting Do not drop start the engine start as described in the Instruction Manual Before starting open the shut off valve completely and ensure a supply of water to the diamond abrasive chain do not allow diamond abrasive chain to run dry Holding and controlling the machine g z x 33 lt a A Always hold the machine firmly with both hands Right hand on the rear handle even if you are left handed To ensure reliable control wrap your thumbs tightly around the handlebar and handle The object to be parted off has to be firmly supported Always guide the device towards the workpiece never in reverse During operation Ensure you always have a firm and safe footing In the event of impending danger or in an emergency switch off the engine immediately by moving the master control lever to STOPor0 English The machine is operated by only one person There should not be any other person within the working area Use extreme caution with openings recesses etc someone could be standing behind them look beforehand Never let the machine run unattended When the engine is running The diamond abrasive chain continues to run for some time after the throttle trigger has been released Risk of injury due to coasting effect Beware o
29. mportant you read and understand the Instruction Manual before first use and keep the manual in a safe place for future reference Non observance of the Instruction Manual may result in serious or even fatal injury Comply with national safety regulations issued e g by employers liability insurance associations social security institutions occupational safety and health authorities or other organizations Anyone using the power tool for the first time Have your dealer or other experienced user show you how to operate your machine or attend a special course in its operation Minors are not allowed to work with the power tool except adolescents above 16 years of age who were instructed under supervision Children animals and bystanders must remain at a distance When the power tool is not in use put it down so that it does not endanger others The machine must be secured against unauthorized access GS 461 The user is responsible for avoiding injury to third parties or damage to their property Hand over or lend the engine driven device to those persons only who are familiar with this model and its handling always pass the instruction manual to them as well The use of noise emitting machines may be restricted to certain times by national or local regulations The machine may only be operated by people who are fit in good physical health and in good mental condition If you have any conditi
30. must use unleaded gasoline lione A few tankfuls of leaded gasoline will greatly reduce the efficiency of the catalytic converter Gasoline with an ethanol content of more than 10 can cause running problems in engines with a manually adjustable carburetor and should not be used in such engines Engines equipped with M Tronic deliver full power when run on gasoline with an ethanol content of up to 25 E25 Engine oil Use only high quality two stroke engine oil preferably STIHL HP HP Super or HP Ultra which are specially formulated for use in STIHL engines HP Ultra guarantees high performance and a long engine life These engine oils are not available in all markets Use only STIHL 50 1 two stroke engine oil for the fuel mix in models with a catalytic converter Mix Ratio STIHL 50 1 two stroke engine oil 50 parts gasoline to 1 part oil Examples Gasoline STIHL engine oil 50 1 Liters Liters ml 1 0 02 20 0 10 100 10 0 20 200 15 0 30 300 20 0 40 400 25 0 50 500 e Use a canister approved for storing fuel Pour oil into canister first then add gasoline and mix thoroughly Storing Fuel Store fuel only in approved safety type fuel canisters in a dry cool and safe location protected from light and the sun Fuel mix ages only mix sufficient fuel for a few weeks work Do not store fuel mix for longer than 30 days Exposure to light the sun low or high temperatures can quickl
31. nd abrasive chain to run dry Always wet cut regardless of the material to be cut The diamond abrasive chain must be guided straight in the cut without wedging Never exert lateral pressure on the diamond abrasive chain Do not use for lateral grinding or scrubbing Do not use the starting throttle position for cutting Engine speed cannot be controlled with the throttle trigger in this position GS 461 Check the work area Avoid danger due to damage to pipes and electric power lines The machine must not be used in the vicinity of flammable substances and combustible gases Do not cut into pipes metal tanks or other containers if you are not sure that they do not contain any volatile or inflammable substances Never leave the machine unattended with the engine running Stop the engine before leaving the machine unattended e g for breaks Work calmly and carefully in daylight conditions and only when visibility is good Do not endanger others stay alert at all times 2411BA003 KN Make certain that all parts of your body are well clear of the extended range of travel of the diamond abrasive chain Only pull concrete cutter out of the object being cut with the diamond abrasive chain running Only use concrete cutter for cutting not for prying or shoveling away objects Always decide the cutting direction before positioning the concrete cutter Do not change the cutting direction Ne
32. ngle cylinder two stroke engine Displacement 76 5 cm Cylinder bore 52 mm Piston stroke 36 mm Engine power according to 4 3 KW 5 8 HP ISO 7293 at 9800 rpm Idling speed 2500 rpm Cut off speed 13500 rpm Ignition system Electronic magneto ignition Spark plug Bosch WSR 6 F suppressed NGK BPMR7A Electrode gap 0 5 mm Fuel system All position diaphragm carburetor with integral fuel pump Fuel tank capacity 780 cm 0 78 Weight dry without cutting attachment 7 6 kg Bar and chain GS 461 The actual cutting length can be less than the specified cutting length GS 461 English Guide bar Rollomatic G power level the K factor in accordance with Directive 2006 42 EC is 2 0 m s Cutting lengths 3 8 for the vibration measurement pitch Groove width 30 40 cm 1 6mm REACH Diamond abrasive chains 3 8 REACH is an EC regulation and stands for the Registration Evaluation Authorisation and Restriction of Chemical substances 36 GBM type 3210 Pitch Drive link gauge 3 8 9 32 mm 1 6 mm For information on compliance with the REACH regulation EC No 1907 2006 see www stihl com reach Chain sprockets 8 tooth for 3 8 rim sprocket Sound and vibration levels When determining sound and vibration levels idling and full load are taken into account in a ratio of 1 6 For further details concerning compliance with the Physical Agents Directive Vibration 2002 44 EC se
33. nts Do not modify the device otherwise the safety may be endangered STIHL excludes all liability for personal injury and damage to property caused while using unauthorized attachments Do not use high pressure cleaners to clean the machine The hard water jet can damage parts of the machine Clothing and equipment Wear proper protective clothing and equipment English Clothing must be sturdy and snug fitting but allow complete freedom of movement Wear snug fitting clothing an over all and jacket combination do not wear a work coat Do not wear clothing that could become trapped in moving parts of the machine no scarves no neckties no jewelry Tie up and confine long hair K warnine To reduce the risk of eye injuries wear tight fitting safety goggles conform ing to standard EN 166 Wear safety boots with steel toe caps and non slip soles aces Make sure that the safety goggles fit correctly Wear a face shield and make sure it fits correctly A face mask alone is not sufficient to protect the eyes Wear personal hearing protection e g ear defenders Wear a hard hat wherever there is any risk of falling objects While working dust for example crystalline material from the object to be parted off vapor and smoke may be produced danger for health Always wear a dust mask if dust is generated English If fumes or smoke are anticipated e
34. of unnecessary wear and damage to the power tool The power tool must be operated maintained and stored with the due care and attention described in this owner s manual The user is responsible for all damage caused by non observance of the safety precautions operating and maintenance instructions in this manual This includes in particular Alterations or modifications to the product not approved by STIHL Using tools or accessories which are neither approved or suitable for the product or are of a poor quality Using the product for purposes for which it was not designed Using the product for sports or competitive events Consequential damage caused by continuing to use the product with defective components Maintenance Work All the operations described in the Maintenance Chart must be performed on a regular basis If these maintenance operations cannot be performed by the owner they should be performed by a servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL GS 461 servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information If these maintenance operations are not carried out as specified the user assumes responsibility for any damage that may occur Among other parts this includes Damage to the engine due to ne
35. on that might be aggravated by strenuous work check with your doctor before operating a power tool If you have a pacemaker The ignition system of this machine produces an electromagnetic field of very low intensity An effect on individual pacemaker types cannot be excluded entirely STIHL recommends that you consult your doctor and the manufacturer of your pacemaker in order to avoid health hazards Never work with the machine while under the influence of alcohol medication or drugs capable of impairing your reaction speed Postpone the work if the weather is bad rain snow ice wind higher risk of accidents The machine may only be used for cutting The machine must not be used for any other purposes risk of accidents GS 461 It is not suitable for cutting wood or wooden objects Asbestos dust is extremely toxic the machine must therefore never be used to cut asbestos Only use tools guide bars diamond abrasive chains or accessories that have been approved by STIHL for this machine or which are technically equivalent If you have any questions in this respect consult a servicing dealer Use only high quality tools and accessories Otherwise there may be a risk of accidents or damage to the machine STIHL recommends the use of genuine STIHL guide bars diamond abrasive chains chain sprockets and accessories They are specifically designed to match your model and meet your performance requireme
36. outside temperatures The force with which the handles are held a tight grip restricts circulation Continual and regular users should monitor closely the condition of their hands and fingers If any of the above symptoms appear e g tingling sensation in fingers seek medical advice Maintenance and repairs The machine must be serviced regularly Do not attempt any maintenance or repair work not described in the Instruction Manual All other work should be carried out by a servicing dealer STIHL recommends that maintenance and repair work be carried out only by authorized STIHL dealers STIHL dealers receive regular training and are supplied with technical information Use only high quality spare parts Otherwise there may be a risk of accidents or damage to the machine Contact a servicing dealer if in doubt STIHL recommends the use of genuine STIHL spare parts Such parts have been optimized for the machine and the user s requirements Before starting any maintenance or repair work and before cleaning the machine always stop the engine risk of injury Exception adjustment of carburetor and idle speed To reduce the risk of fire due to ignition outside the cylinder move the slide control to STOP or 0 before turning the engine over on the starter with the spark plug boot removed or the spark plug unscrewed Do not service or store the machine near a naked flame risk of fire due to the fuel
37. rder of steps GS 461 Spark Plug lfthe engine is down on power difficult to start or runs poorly at idle speed first check the spark plug Fit anew spark plug after about 100 operating hours or sooner if the electrodes are badly eroded Install only suppressed spark plugs of the type approved by STIHL see Specifications Remove the spark plug Remove coarse dirt from the machine Turn screw plug above the rear handle in the direction of the arrow and remove filter cover screw plug is secured in the filter cover Lift the air baffle 1 up and off Unplug spark plug boot 2 Unscrew spark plug Checking the spark plug readjust if necessary see Specifications Rectify the problems which have caused fouling of the spark plug Possible causes are 2411BA032 KN 000BA039 KN English 000BA045 KN warnine If the spark plug comes with a detachable adapter nut 1 screw the adapter onto the thread and tighten it down firmly to reduce the risk of arcing and fire Installing the spark plug z A E lt 5 e Clean dirty spark plug 3 e Check electrode gap A and Install in the spark plug and tighten Press on the spark plug boot 1 firmly Insert the air baffle 2 from above Too much oil in fuel mix e Mount filter cover Dirty air filter Unfavorable running conditions GS 461 23 English Rewind Star
38. rocket nose of the Rollomatic guide bar must match The drive link gauge 2 of the diamond abrasive chain 1 must be matched to the groove width of the guide bar 3 When pairing components that are not compatible with each other the cutting attachment may become damaged beyond repair after only a short period of operation Diamond abrasive chain The correct use of the STIHL diamond abrasive chain ensures economical use and avoids accelerated wear GS 461 The STIHL diamond abrasive chain is suitable for cutting the following materials Concrete Reinforced concrete General blocks Masonry Stone pipes Abrasive stone e g asphalt and bricks sandstone Hard stone granite ductile cast iron pipes Restrictions on power and service life are possible Do not cut any other materials risk of accident Chain scabbard The product contents includes a chain scabbard that is suitable for the bar and chain English Mount guide bar and diamond abrasive chain Removing the chain sprocket cover 2411BA011 KN Unscrew nuts 1 from the studs nuts are fastened to the chain sprocket cover so that they are secured against loss Remove chain sprocket cover 2 2411BA012 KN Turn the screw 3 to the left until the tensioner slide 4 butts against the left end of the housing slot 11 English Fit diamond abrasive chain 24
39. rosion protection Do not spray engine unit Long term storage See Storing the machine 20 Air Filter System When dry STIHL filters attain a long service life e Always use STIHL filters dry Fouled air filters will impair engine performance increase fuel consumption and make the machine more difficult to start Remove air filter 2411BA030 KN Turn screw plug above the rear handle in the direction of the arrow and remove filter cover screw plug is secured in the filter cover zZ x D S lt a e Detach the air filter Do not remove and clean the auxiliary filter GS 461 Cleaning the Air Filter If there is a noticeable loss of engine power Dry wet air filter if necessary do not expose to extreme heat lfthe air filter is very dirty clean the filter thoroughly Thorough filter cleaning e Wash the air filter in STIHL special purpose cleaner special accessory or a clean non flammable cleaning liquid e g warm soapy water rinse the air filter from inside to out under a water flow do not use high pressure washers e Dry the air filter do not expose to extreme heat do not dry with compressed air e Do not oil the air filter e Reinstall air filter Always replace a damaged air filter GS 461 Adjusting the Carburetor General Information The carburetor comes from the factory with a standard setting This setting provides an optimum fuel
40. te check the sharpness of the diamond abrasive chain resharpen as needed To do this briefly cut through abrasive material e g sandstone aerated concrete or asphalt GS 461 Maintenance and Care English The following information applies under normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions 5 g extensive dust etc x 5 S Q a gt x S ls S 3 s 2 L D 5 gt gt D 5 Lg 2 u ra gt 2 o S s gt 2 2 83 5 5 3 3 2 a Zs gt lt Visual inspection condition leaks x x Complete machine Clean x Throttle trigger throttle trigger lockout master con Function tests x x trol lever Check x Manual fuel pump if present Have repaired by a specialist dealer x Check x Fuel pickup body in fuel tank Replace x x x Fuel tank Clean x Water supply chain lubrication Check x Check pay attention to sharpness x x Check chain tension retension if necessary also check every 15 minutes while working retension X x Diamond abrasive chain if necessary Sharpen x clean and spray with STIHL multispray x check wear damage action of sprocket nose x clean and spray with STIHL multispray x Guide bar Flip x Deburr x Replace x x Chain sprocket Check replace if necessary x3 x x Clean x
41. ter To help prolong the wear life of the starter rope observe the following points e Pull the starter rope only in the direction specified e Donot pull the rope over the edge of the guide bushing e Do not pull out the rope more than specified e Donotallow the starter grip to snap back guide it back into the housing slowly see chapter on Starting Stopping the Engine Have a damaged starter rope replaced by your dealer before it breaks completely STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer 24 Storing the Machine If the machine is to remain out of use for approx 3 months or more Drain and clean the fuel tank in a well ventilated place Dispose of fuel in accordance with the regulations and having regard for the environment e Run the engine until the carburetor is dry this helps to prevent the carburetor diaphragms sticking together Remove clean and dry diamond abrasive chain and guide bar and spray with STIHL multispray in particular the bearing of the sprocket nose corrosion protection Thoroughly clean the machine pay special attention to the cylinder fins and air filter Store machine in a safe and dry place Protect against unauthorized use e g by children Taking Care of the Guide Bar 2411BA028 KN Flip the guide bar each time the chain is changed
42. ver push or hit with the device into the English cutting gap do not let the parting off grinder fall into the cutting depth risk of breakage If cutting performance begins to deteriorate check the sharpness of the diamond abrasive chain resharpen as needed To do this briefly cut through abrasive material e g sandstone aerated concrete or asphalt When working at heights Always use a lift bucket Never use the machine while standing on a ladder Never use the machine in unsteady locations Never cut above shoulder height Never use the machine with one hand Begin cutting with the concrete cutter at full throttle At the end of the cut the concrete cutter is no longer supported by the cutting attachment in the cut The machine s weight must be borne by the user risk of loss of control Keep water and sludge away from alive electrical cables risk of electric shock Vibrations Prolonged use of the power tool may result in vibration induced circulation problems in the hands whitefinger disease No general recommendation can be given for the length of usage because it depends on several factors English The period of usage is prolonged by Hand protection wearing warm gloves Work breaks The period of usage is shortened by Any personal tendency to suffer from poor circulation symptoms frequently cold fingers tingling sensations Low
43. y make the fuel mix unusable STIHL MotoMix may be stored for up to 2 years without any problems Thoroughly shake the mixture in the canister before fueling your machine A warnino Pressure may build up in the canister open it carefully e Clean the fuel tank and canister from time to time GS 461 English Dispose of remaining fuel and cleaning Refuel fluid properly in accordance with local regulations and environmental requirements Fueling Take care not to spill fuel while fueling and do not overfill the tank STIHL me recommends use of the STIHL filling system for fuel special accessory Preparing the machine Closing the filler cap e Before fueling clean the filler cap and the area around it so that dirt cannot fall into the tank e Always position the machine so that the filler cap is facing upwards A warning Never use a tool to open the bayonet filler cap This could damage the cap e Fit the cap and turn it until it and cause fuel to leak out engages in the bayonet catch Press the cap down as far as possible with your hand and turn it clockwise approx 1 8 of a turn until it engages properly z x lt ao A Opening the twist lock z x N 5 lt a x N Press the filler cap down as far as possible by hand then turn it counterclockwise approx 1 8 turn and remove GS 461 15 English Changing the fuel pickup body every year 24

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