Husqvarna 51 Operator'S Manual Download

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101 91 94-95

Please read these instructions carefully and make
sure you understand them before using the saw.

Operator´s manual

(EPA)

Summary of Contents for 51

Page 1: ...51 55 101 91 94 95 Please read these instructions carefully and make sure you understand them before using the saw Operator s manual EPA ...

Page 2: ...otective helmet Approved hearing protection Protective glasses or visor Both of the operator s hands must be used to operate the chain saw Please see page 30 in your Chain saw operator s safety manual Never operate a chain saw holding it with one hand only Please see page 30 in your Chain saw operator s safety manual Contact of the guide bar tip with any object should be avoided Please see pages 1...

Page 3: ...d and adjusted See page 25 Refuel and start the saw Check the carburetor settings See pages 26 29 Do not use the saw until sufficient chain oil has reached the chain see page 14 IMPORTANT If the carburetor mixture is too lean it greatly increases the risk of engine failure Poor maintenance of the air filter will cause carbon build up on the spark plug and lead to difficult starting If the chain is...

Page 4: ...gerous tool if used carelessly or incorrectly and can cause serious even fatal injuries It is very important that you read and understand these instructions PERSONAL PROTECTIVE EQUIPMENT MOST CHAIN SAW ACCIDENTS HAPPEN WHEN THE CHAIN TOUCHES THE OPERA TOR You must wear approved protective equipment whenever you use a chain saw Personal protective equipment cannot eliminate the risk of injury but i...

Page 5: ...ed mechanism that tightens the Brake Band C around the engine drive system D Clutch Drum SAFETY INSTRUCTIONS 2 The front hand guard is not designed solely to activate the chain brake Another important safety feature is that it prevents the chain from hitting your left hand if you lose your grip on the front handle 3 You can also use the chain brake as a temporary brake when you change position or ...

Page 6: ... but there are certain factors to remember see point 6 above 2 Throttle lock The throttle lock is designed to prevent accidental opera tion of the throttle control When you press the lock A i e when you grasp the handle it releases the throttle trigger B When you release the handle the throttle trigger and the throttle lock both move back to their original positions This movement is controlled by ...

Page 7: ...system Your chain saw is equipped with a vibration damping system that is designed to minimise vibrations and make operation easier When you use a chain saw vibrations are generated by the uneven contact between the chain and the wood you are cutting Cutting hardwoods most broadleaf trees creates more vibration than cutting softwoods most conifers Cutting with a chain that is blunt or faulty wrong...

Page 8: ...d front hand guard 1 Checking brake band wear Brush off any sawdust resin and dirt from the chain brake and clutch drum Dirt and wear can impair operation of the brake Regularly check that the brake band is at least 0 6 mm thick at its thinnest point SAFETY INSTRUCTIONS 4 Checking the brake trigger Start the chain saw and place it on firm ground Make sure the chain does not touch the ground or any...

Page 9: ... 1 Make sure the throttle control is locked at the idle setting when you release the throttle lock 2 Press the throttle lock and make sure it returns to its original position when you release it 3 Check that the throttle control and throttle lock move freely and that the return springs work properly 4 Start the saw and apply full throttle Release the throttle control and check that the chain stops...

Page 10: ...he risk of kickback Reduce the risk of the chain breaking or jumping Obtain maximum cutting performance Extend the life of cutting equipment The 5 basic rules 1 Only use cutting equipment recommended by us See the Technical data section 2 Keep the chain cutting teeth properly sharpened Follow our instructions and use the recommended file gauge A damaged or badly sharpened chain increases the risk ...

Page 11: ...ACK REDUCTION The level of kickback reduction offered by a chain is indicated by its model number See the Technical data section to find the model numbers of chains that are recommended for use with your saw 1 Cutting equipment designed to minimise kickback Faulty cutting equipment or the wrong combination of bar and chain increases the risk of kickback Use only the bar and chain combinations reco...

Page 12: ...data section for information about sharpening your saw chain It is very difficult to sharpen a chain correctly without the right equipment We recommend you use a file gauge This will help you obtain the maximum kickback reduction and cutting performance from your chain The following faults will increase the risk of kickback considerably FILE ANGLE TOO LARGE CUTTING ANGLE TOO SMALL FILE DIAMETER TO...

Page 13: ...sharpened We recommend that you adjust the raker clearance every third time you sharpen the chain NOTE This recommendation assumes that the length of the cutting teeth is not reduced excessively To adjust the raker clearance you will need a FLAT FILE and a RAKER GAUGE Place the gauge over the raker lip Place the file over the part of the lip that protrudes through the gauge and file off the excess...

Page 14: ...ave been chosen so that the saw will run out of fuel before running out of oil This means that you should never run with a dry chain However this safety feature requires that you use the right sort of chain oil if the oil is too thin it will run out before the fuel and that you adjust the carburetor as recommended a weak mixture may mean that the fuel lasts longer than the oil You should also use ...

Page 15: ... each time you refuel Use the special grease gun and a good quality bearing grease SAFETY INSTRUCTIONS E Lubricating the clutch drum bearing Between the engine drive shaft and the clutch drum is a needle bearing that must be lubricated daily Use the specially designed grease gun and a good quality bearing grease F Checking wear on cutting equipment Saw chain Check the saw chain daily for Visible c...

Page 16: ...e section on General working instructions CHECK THAT ALL SAFETY FUNCTIONS ARE WORKING see section on General working instructions and General safety precautions SAFETY INSTRUCTIONS HOW TO AVOID KICKBACK Kickback can happen very suddenly and violently kicking the saw bar and chain back at the user If this happens when the chain is moving it can cause very serious even fatal injuries It is vital you...

Page 17: ...the wrong cutting equipment or a chain that is not sharpened correctly The wrong combination of bar and chain can increase the risk of kickback General rules 1 If you understand what kickback is and how it happens then you can reduce or eliminate the element of surprise By being prepared you reduce the risk Kickback is usually quite mild but it can sometimes be very sudden and violent 2 Always hol...

Page 18: ...und Then grasp the starter handle with your right hand and pull the starter cord 7 FUEL SAFETY Refuelling fuel mixture storage Fuel and fuel vapour are highly inflammable Take care when handling fuel and chain oil Keep away from naked flames and do not breathe in fuel vapour Never try to refuel the saw while it is running Make sure there is plenty of ventilation when refuelling or mixing fuel 2 st...

Page 19: ... rain strong wind intense cold etc Working in cold weather is tiring and often brings added risks such as icy ground unpredictable felling direction etc 3 Take great care when removing small branches and avoid cutting bushes i e cutting many small branches at the same time Small branches can be grabbed by the chain and thrown back at you causing serious injury 4 Check the area around you for possi...

Page 20: ...nish the cut Maintain full throttle but be prepared in case the chain snatches A If it is possible to turn the log you should stop cutting about 2 3 of the way through B Turn the log and finish the cut from the opposite side 2 Basic cutting technique General Always use full throttle when cutting Reduce the speed to idle after every cut running the engine for too long at full throttle without any l...

Page 21: ...e tree in the best possible position for subsequent limbing and cross cutting You want it to fall on ground where you can move about safely The main point to avoid is letting the tree fall onto another tree It can be both difficult and dangerous to remove a tree in such a position see point 4 in this section Once you have decided which way you want the tree to fall you must judge which way the tre...

Page 22: ... weight or with the aid of a FELLING WEDGE or BREAKING BAR C Clearing the trunk and preparing your retreat Remove any branches that are in the way To do this it is best to work from the top down and keep the trunk between you and the chain saw Never limb above shoulder height Remove any undergrowth from the base of the tree and check the area for obstacles stones branches holes etc so that you hav...

Page 23: ...fely In complicated situations the only safe method is to put aside your chain saw and use a winch SAFETY INSTRUCTIONS General advice a Position yourself so that you will be clear of the tree or branch when it springs free b Make one or more cuts at or near the BREAKING POINT Make as many cuts of sufficient depth as necessary to reduce the tension and make the tree or branch break at the BREAKING ...

Page 24: ...13 Bar tip sprocket 14 Saw chain 15 Saw bar 16 Bumper 17 Chain catcher Catches chain if it jumps or breaks 18 Clutch cover 19 Right hand guard Protects right hand if chain breaks or jumps 20 Throttle control 21 Throttle lock Prevents accidental operation of throttle control 22 Decompression valve 55 23 Combination spanner 24 Chain tensioning screw 25 Operator s manual 26 Bar guard 2 3 13 14 15 17 ...

Page 25: ...o be checked frequently until the chain is run in Check the chain tension regularly A correctly tensioned chain gives good cutting performance and long lifetime A Fit the bar over the bar bolts Place the bar in its rearmost position Place the chain over the drive sprocket and in the groove on the bar Begin on the top side of the bar Make sure that the edges on the cutting links are facing forward ...

Page 26: ... the air temperature In temperatures below 0o C 32o F some oils become too viscous This can overload the oil pump and result in damage to the oil pump components Contact your servicing dealer when choosing chain oil Always provide for good ventilation when handling fuel IMPORTANT The chain saw is equipped with a two stroke engine and must always been run using a mixture of gasoline and two stroke ...

Page 27: ... fuel cap carefully after fuelling Always move the saw from the fuelling area before starting Clean around the fuel cap Clean the fuel and chain oil tanks regularly The fuel filter should be changed at least once a year Contamination in the fuel tanks causes malfunction Make sure the fuel is well mixed by shaking the container before fuelling The volume of chain oil and fuel tanks are adjusted to ...

Page 28: ...starts rapidly give full throttle Then the throttle latch will disengage CAUTION Do not release the starter handle from fully pulled out position as this can cause damage on the saw Stop The engine is stopped by switching off the ignition Move the ignition switch to stop position Cold engine CHAIN BRAKE Disengage the chain brake by pulling the hand guard towards the front handle IGNITION Move the ...

Page 29: ...s to rotate Then turn counter clockwise until the chain stops A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position It should also be good margin to the rpm when the chain starts to rotate High speed needle H The high speed needle H influences the power of the saw A too lean adjusted high speed needle H high speed needle H closed too much gives overrevs and...

Page 30: ...ging a broken or worn starter cord The recoil spring is disassembled from the starter device with its inside facing down Tap the starter lightly against a working bench or similar If the spring pops out when assembling it should be mounted again out and in towards the centre Lubricate the recoil spring with thin oil Assemble the starter pulley and tension the recoil spring Changing a broken or wor...

Page 31: ... screen at least once a week This is done with a wire brush CAUTION The screen must be replaced if damaged The saw will be overheated if the screen is clogged This results in damage on the cylinder and the piston Never use a saw with a clogged or defective muffler MAINTENANCE Spark plug The spark plug condition is influenced by An incorrect carburetor setting Wrong fuel mixture too much oil in the...

Page 32: ...m the cylinder can enter the carburetor chamber to prevent icing of the filter Fit the rubber seal to the fuel pipe by the main air intake Temperature 5 C or colder If the saw is to be used in cold weather or powder snow conditions a special cover flap can be fitted to the right side of the cylinder This restricts the flow of cold air and reduces the amount of snow that is sucked in NOTE If the sp...

Page 33: ...gger for smooth operation If any binding occurs or if engine fails to return to idle the saw should be taken to your dealer before it is used again Also be sure that the trigger cannot be pulled until the throttle trigger lockout is depressed 2 Clean the chain brake and check its function according to the instructions Make sure that the chain catcher is undamaged Otherwise replace it immediately 3...

Page 34: ...may be considered to have equivalent kickback energy A hard nose bar having the same length and nose radius as a sprocket bar may be considered to have equivalent or less kickback energy than the sprocket nose bar Low kickback saw chain is a chain which has only met the kickback performance requirements of ANSI B 175 1 safety requirements for gasoline powered chain saws when tested on the represen...

Page 35: ...ial owner and each subsequent purchaser that the engine is free from defects in materials and workmanship which cause the failure of a warranted part for a period of two years WHAT IS COVERED REPAIR OR REPLACEMENT OF PARTS Repair or replacement of any warranted part will be performed at no charge to the owner at an approved Husqvarna Forest Garden servicing dealer If you have any questions regardi...

Page 36: ... 33Q 5 2001W07 ...

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