Stihl MS 391 Safety Manual Download | Manualshive

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Summary of Contents for MS 391

Page 1: ...Chain Saw Safety Manual...

Page 2: ......

Page 3: ...n the instruction manuals for STIHL chain saws The chapter on Main Parts of the Saw shows the MS 211 as an example Other chain saw models may have different parts and controls This manual contains ref...

Page 4: ...act or drugs must not operate a power tool Postpone the work if the weather is bad rain snow ice wind higher risk of accidents Do not cut any material other than wood or wooden objects Other uses are...

Page 5: ...ties of fuel Before starting Check that saw is properly assembled and in good condition refer to appropriate chapters in the Instruction Manual functional chain brake front hand guard Correctly mounte...

Page 6: ...ally hot Ensure proper ventilation when working in trenches hollows or other confined areas Toxic fumes can kill If you feel sick if you have a headache vision problems e g your field of vision gets s...

Page 7: ...ar nose Be especially careful with small tough limbs undergrowth and offshoots the saw chain may become caught in them Never cut several limbs at once Do not lean too far forward Do not cut above shou...

Page 8: ...ith 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 Sawing Do not use the starting throttle pos...

Page 9: ...chain saw users should carry out neither felling nor limbing increased risk of accidents Comply with national regulations regarding felling technique Only persons who are engaged in felling may be pr...

Page 10: ...the tree is in sound condition Making a felling notch With the help of the gunning sight on the shroud and fan housing of the chain saw it is possible to check the direction of fall when cutting the f...

Page 11: ...izontal cut of the felling notch Exactly horizontal approx 1 10 of the diameter of the trunk must remain standing between the felling cut and the notch bridge Insert wedges in the felling cut in time...

Page 12: ...ge hold the saw absolutely horizontally and swing it as far as possible use the spiked bumper as a pivot point reposition the chain saw as little as possible 2 While repositioning for the next cut kee...

Page 13: ...the trunk N Make the plunge cut in the felling notch very carefully danger of pushback then swing in the direction of the arrow Limbing Limbing may only be carried by persons who have had special tra...

Page 14: ...ealers receive regular training and are supplied with technical information Use only high quality replacement parts in order to avoid the risk of accidents or damage to the machine Contact a dealer if...

Page 15: ...l lubricated Change chain guide bar and chain sprocket in due time Check that the clutch drum is in perfect working condition Always store fuel and chain lubricant only in the specified type of contai...

Page 16: ...roblem if damaged if required Complete machine Visual inspection condition leaks X X Clean X Throttle trigger trigger interlock choke lever stop switch Master Control lever depending on version Check...

Page 17: ...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 after 10 to 20 hours of operation The following maintenance in...

Page 18: ...Oilmatic saw chain 13 Adjusting wheel quick chain tensioner 14 Handle of wingnut1 quick chain tensioner 15 Oil filler cap 16 Muffler 17 Front hand guard 18 Front handle handlebar 19 Spark plug boot 2...

Page 19: ......

Page 20: ...www stihl com 04571840121 0457 184 0121 0457 184 0121 englisch G...

Page 21: ...STIHL MS 311 391 Instruction Manual...

Page 22: ......

Page 23: ...Techniques 2 Cutting Attachment 14 Mounting the Bar and Chain 14 Tensioning the Chain 15 Checking Chain Tension 15 Fuel 16 Fueling 17 Chain Lubricant 18 Filling Chain Oil Tank 19 Checking Chain Lubric...

Page 24: ...e it against unauthorized use The user is responsible for avoiding injury to third parties or damage to their property Guide to Using this Manual Fuel tank fuel mixture of gasoline and engine oil Tank...

Page 25: ...chains chain sprockets and accessories They are specifically designed to match your model and meet your performance requirements Never attempt to modify your power tool in any way since this may incr...

Page 26: ...trol of the chain saw To reduce the risk of personal injury do not operate your saw if it is damaged or not properly assembled Starting the engine Start the engine at least 3 meters from the fueling s...

Page 27: ...st vapor and smoke produced during operation may be dangerous to health If dust levels are very high wear a suitable respirator Check the saw chain at regular short intervals during operation or immed...

Page 28: ...cure grip Always cut at full throttle Be aware of the location of the guide bar nose at all times Do not cut with the bar nose Take special care with small tough limbs they may catch the chain Never c...

Page 29: ...your saw with the starting throttle lock engaged Engine speed cannot be controlled with the throttle trigger in this position Work calmly and carefully in daylight conditions and only when visibility...

Page 30: ...ch you want the tree to fall Pay special attention to the following points The natural lean of the tree Any unusually heavy limb structure damage The wind direction and speed do not fell in high winds...

Page 31: ...he horizontal cut check the direction of fall with the gunning sight N Make angle cut at about 45 N Check the felling notch and correct it if necessary Important Felling notch at a right angle to the...

Page 32: ...num or plastic wedges Never steel which can damage the chain and cause kickback The hinge E helps control the falling tree Do not cut through the hinge you could lose control of the direction of fall...

Page 33: ...he simple fan cut do not cut through the hinge Special cutting techniques Plunge cuts and heartwood cuts require special training and experience Plunge cutting For felling leaners For relieving cuts d...

Page 34: ...atch for limbs which are under tension Never cut several limbs at once When cutting small logs Use a sturdy and stable support sawhorse Never hold the log with your leg or foot Never allow another per...

Page 35: ...ny maintenance or repairs or cleaning the machine Exception Carburetor and idle speed adjustments Do not turn the engine over on the starter with the spark plug boot or spark plug removed unless the s...

Page 36: ...f non matching components are used the cutting attachment may be damaged beyond repair after a short period of operation Removing the chain sprocket cover N Unscrew the nuts and take off the chain spr...

Page 37: ...the tensioning screw 1 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 A new ch...

Page 38: ...l 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 thoroughly Storing Fuel Store fuel only in approved safety...

Page 39: ...er cap Refueling Take care not to spill fuel while fueling and do not overfill the tank STIHL recommends use of the STIHL filling system for fuel special accessory N Refueling Closing Clip is in an up...

Page 40: ...ompatible quality chain and bar lubricant Rapidly biodegradable STIHL Bioplus is recommended The service life of the chain and guide bar depends on the quality of the lubricant It is therefore essenti...

Page 41: ...t go down the reason may be a fault in the oil supply system Check chain lubrication clean the oilways contact your dealer for assistance if necessary STIHL recommends that you have servicing and repa...

Page 42: ...ting work Run engine at idle speed engage the chain brake push hand guard toward bar nose and open the throttle wide for no more than 3 seconds the chain must not rotate The hand guard must be free fr...

Page 43: ...temperatures below 10 C powdered or drifting snow it is recommended to use the cover plate mounting kit special accessory In case of erratic idling behavior or poor acceleration N Turn the low speed...

Page 44: ...igger lockout and blipping the throttle trigger causes the Master Control lever to jump from the warm start n position to the operating position F To switch off the engine set the Master Control lever...

Page 45: ...h a new engine or after a long period of disuse with machines without an additional manual fuel pump it may be necessary to pull the starter rope several times to prime the fuel line Starting the chai...

Page 46: ...lightly open N if necessary configure for winter operation see Winter Operation Switch off engine N Move the Master Control lever to the stop position 0 If the Master Control lever was moved from the...

Page 47: ...the bar groove on the underside of the bar the chain may otherwise jump off the bar Retension the chain see Tensioning the Saw Chain After a long period of full throttle operation After a long period...

Page 48: ...position To increase oil feed N turn the adjusting screw clockwise Turn reduce oil feed N turn the adjusting screw counterclockwise N Turn the bar over every time you sharpen the chain and every time...

Page 49: ...a fabric filter Fleece filter For normal or dry applications Fleece filter with felt prefilter For very dusty operating environments Fabric filter For extreme winter conditions e g powdered or drifti...

Page 50: ...than the fleece filter Installing the air filter N Insert the lugs 1 into the recesses 2 N Tilt the air filter toward the filter housing and close the clip N Refit the shroud and tighten the screws G...

Page 51: ...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...

Page 52: ...N Pull off the spark plug boot N Unscrew spark plug Checking the spark plug N Clean dirty spark plug N Check electrode gap A and readjust if necessary see Specifications N Rectify the problems which h...

Page 53: ...out of the starter handle with a screwdriver N Remove the remainder of the rope from the rotor and starter handle N Thread the new starter rope through the starter handle and secure it by making a sp...

Page 54: ...t the spring has been tensioned too tightly and may break N Remove one turn of the rope from the rotor N Install the fan housing N Refit the shroud and tighten the screws Replacing broken rewind sprin...

Page 55: ...ain and guide bar N Release chain brake pull hand guard against the front handle Fit new chain sprocket after use of two saw chains or earlier if the wear marks arrows are deeper than 0 5 mm otherwise...

Page 56: ...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 sharpening r...

Page 57: ...hand guard forward N To advance the saw chain pull the hand guard toward the handlebar The chain brake is disengaged With the Quickstop Super chain brake system additionally press the throttle trigge...

Page 58: ...tter to be checked if the depth gauge protrudes past the file gauge the depth gauge must be reworked N Rework the depth gauge so that it is flush with the file gauge N Afterwards dress the leading edg...

Page 59: ...s Part number Part number Part number Part number Part number 1 4 6 35 4 0 5 32 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027 3 8 P 9 32 4 0 5 32 5605 772 4006 5605 750 4327 11...

Page 60: ...nths if problem if damaged if required Complete machine Visual inspection condition leaks X X Clean X Throttle trigger trigger interlock Master Control Check operation X X Chain brake Check operation...

Page 61: ...er Check X Replace X Safety labels Replace X 1 STIHL recommends a STIHL servicing dealer 2 see chapter on Chain Brake 3 Firmly tighten down the cylinder base screws of chain saws 3 4 kW or more after...

Page 62: ...ler 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 course...

Page 63: ...n catcher 10 Side access chain tensioner 11 Bumper spike 12 Guide bar 13 Oilomatic saw chain 14 Oil filler cap 15 Muffler 16 Front hand guard 17 Front handle handlebar 18 Starter grip 19 Fuel tank twi...

Page 64: ...sound pressure level and sound power level the K factor in accordance with Directive 2006 42 EC is 2 0 m s2 for the vibration measurement Specifications Displacement 59 0 cm3 Bore 47 mm Stroke 34 mm...

Page 65: ...in scabbard or a scabbard extension is necessary Depending on the model the scabbard extension either comes standard with the saw or is available as a special accessory Fitting the chain scabbard exte...

Page 66: ...ement 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 numb...

Page 67: ...n 17 06 2010 ANDREAS STIHL AG Co KG pp Elsner Head of Product Group Management All STIHL products comply with the highest quality standards An independent organization has certified that all products...

Page 68: ...www stihl com 04585420121B 0458 542 0121 B 0458 542 0121 B englisch G...

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