Cobra CS420 Owner'S Manual Download

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C03�A

MODELS: CS420/CS520/CS620

COBRA PETROL CHAINSAW

OWNER'S MANUAL

& Caution

Before using our chain saws. please read this

manual carefully to understand the proper use of

your unit. keep this manual handy.

V: SEPT 2016

Summary of Contents for CS420

Page 1: ...ODELS CS420 CS520 CS620 COBRA PETROL CHAINSAW OWNER S MANUAL Caution Before using our chain saws please read this manual carefully to understand the proper use of your unit keep this manual handy REV SEPT 2016 ...

Page 2: ...ch must be followed in order to prevent accidents which could lead to serious bodily injury or death IMPORTAN j This mark indicates instructions which must be followed or it leads to mechanical failure breakdown or damage NOT This mark indicates hints or directions useful in the use of the product Contents 1 PARTS LOCATION 2 2 WARNING LABELS ON THE MACHINE 2 3 SYMBOLS ON THE MACHINE 3 4 SAFETY PRE...

Page 3: ... 2 WARNING LABELS ON THE MACHINE 1 Read owner s manual before operating this machine 2 Wear head eye and ear protection 3 Use the chain saw with two hands 4 Warning Kickback is a danger 5 Warning Attention IMPORTAN If warning seals peel off or become soiled and impossible to read you should contact the dealer from which you purchased the product to order new seals and affix the new seal s in the r...

Page 4: ...he choke closes Position rear right of the unit e The indication regarding the chain oil adjuster nut iu a b I c Q STOP 1 1 d PULL CHAIN OIL e MIN direction the oil flow decrease MAX direction the oil flow increase Position bottom of the clutch side MAX MIN f The carburetor position of H needle The position of L needle The position of idle adjusting screw T Position rear left of the unit 4 SAFETY ...

Page 5: ...d this in turn leads to accidents and injury Limit the amount of time of using the machine continuously to somewhere around 10 minutes per session and take 10 20 minutes of rest between work sessions Also try to keep the total amount of work performed in a single day under 2 hours or less g Be sure to keep this manual handy so that you may refer to it later whenever any questions arise h Always be...

Page 6: ...fuel away from the working area d If any fuel spillage occurs during refueling use a dry rag to wipe up spills before turning the engine back on again e After refueling screw the fuel cap back tightly onto the fuel tank and then carry the product to a spot 4m or more away from where it was refueled before turning on the engine BEFORE STARTING ENGINE Check working place the cutting object and cutti...

Page 7: ...inches the saw chain in the cut Tip contact in some cases may cause a lightning fast reverse reaction kicking the guide bar up and back towards the operator Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator Either of these reactions may cause you to lose control of the saw which could result in serious personal injury Do not rely exclusi...

Page 8: ...G The metallic parts reach high temperatures during running and after stopping the engine Leave all maintenance other than the items listed in the Owner s Manual to a competent authorised servicing dealer TRANSPORTATION Always carry the unit with the engine stopped the guide bar covered with the protector to the rear and the exhaust away from your body 5 INSTALLING GUIDE BAR AND SAW CHAIN A standa...

Page 9: ...just the position of chain tensioner bar 9 on the chain cover to the lower hole 8 of the guide bar F2 10 Chain cover 9 Tensioner Bar 8 Hole NOTE F3 1 Chain Moving Direction Pay attention to the correct direction of the saw chain F3 5 Fit the chain cover to the power unit and fasten the nuts to finger tightness 6 While holding up the tip of the bar adjust the chain tension by turning the tensioner ...

Page 10: ...d mixing ratio Mixture Ratio Petrol Oil 40 1 Always use fresh unleaded petrol 95 RON and semi synthetic two stroke oil meeting the above standards I AWARNINGI Keep open flames away from the area where fuel is handled or stored Mix and store fuel only in an approved petrol container NOT Most engine troubles are caused directly or indirectly by the fuel used in the machine Take special care not to m...

Page 11: ...the bulb NOT When restarting immediately after stopping the engine leave the choke knob at the open position 5 While holding the saw unit securely on the ground pull the starter rope vigorously F11 IAWARNINGI Do not start the engine while hanging the chain saw with a hand Tha saw chain may touch your body It s vary dangerous 6 When engine has ignited first push in the choke knob and pull the start...

Page 12: ...s Before adjusting the carburetor make sure that provided are clean air fuel filters and fresh properly mixed fuel When adjusting take the following steps Be sure to adjust the carburetor with the bar chain attached 1 Stop engine and screw in both H and L needles until they stop Never force Then set them back the initial number of turns as shown below H needle 1 4 L naadla 1 4 2 Start engine and a...

Page 13: ...pplied to the engine and to there by prevent icing from occurring Under normal oircumstances the product should be used in normal operating mode i e in the mode to which it is set at the time of shipment However when the possibility exists that icing may occur the unit should be set to operate in anti freeze mode before use f15 HOW TO SWITCH BETWEEN OPERATING MODES F15 1 Flip the engine switch to ...

Page 14: ...e in saw cutting operation The brake is automatically operated by inertial force which acts on the weight fitted inside the front guard This brake can also be operated manually with the front guard turned down to the guide bar F16 To release brake pull up the front guard toward the front handle till click sound is heard Caution Be sure to confirm brake operation on the daily inspection How to conf...

Page 15: ...ock it over fixed stands It is not necessary to force the saw into the cut Apply only light pressure while running the engine at full throttle When the saw chain is caught in the cut do not attempt to pull it out by force but use a wedge or a lever to open the way GUARD AGAINST KICKBACK F19 This saw is equipped with a chain brake that will stop the chain in the event of kickback if operating prope...

Page 16: ...thold and retreat path 3 Make a notch cut one third of the way into the tree on the felling side 4 Make a felling cut from the opposite side of the notch and at a level slightly higher than the bottom of the notch IA WARNING When you fell a tree be sure to warn your neighboring workers of the danger 1 Notch cut 2 Felling cut 3 Felling direction Bucking and Limbing IA WARNING Always ensure your foo...

Page 17: ...pringing back of a cut limb Pruning of Standing Tree F24 Cut up from the bottom finish down from the top AWARNINGI Do not use an unstable foothold or ladder Do not overreach Dot not cut above shoulder height Always use your both hands to grip the saw 9 MAINTENANCE AWARNINGI Before cleaning inspecting or repairing your unit make sure that engine has stopped and is cool Disconnect the spark plug to ...

Page 18: ...DICAL SERVICE POINTS 1 Cylinder fins Dust clogging between the cylinder fins will cause overheating of the engine Periodically check and clean the cylinder fins after removing the air cleaner and the cylinder cover When installing the cylinder cover make sure that switch wires and grommets are positioned correctly in place F29 NOT Be sure to block the air intake hole 2 Spark plug F30 Clean the ele...

Page 19: ...E OF SAW CHAIN AND GUIDE BAR SAW CHAIN I A WARNING It is very important for smooth and safe operation to keep the cutters always sharp Your cutters need to be sharpened when sawdust becomes powder like You need extra force to saw in The cut way does not go straight Vibration increases Fuel consumption increases Cutter setting standards I A WARNING Be sure to wear safety gloves Before filing Make s...

Page 20: ...ker 2 Make the shoulder round 3 Depth gauge standard Make sure every cutter has the same length and edge angles as illustrated F34 4 Cutter length 5 Filling angle 6 Side plate angle 7 Top plate cutting angle GUIDE BAR Reverse the bar occasionally to prevent partial wear The bar rail should always be a square Check for wear of the bar rail Apply a ruler to the bar and the outside of a cutter If a g...

Page 21: ...550ml 550ml 550ml 300ml 300ml 300ml 3000rpm 7T 3 8 7T 0 325 7T 0 325 3 8 in 0 325 in 0 325 in 0 050 in 0 058 in 0 050 in ...

Page 22: ...d to compile the technical Henton Chattel Ltd London Road Nottingham NG2 3HW United Kingdom file WARRANTY This product is warranted in accordance with legal regulations fo r a 24 month period effective fr om the date of purchase by the first user This product will not be covered if used in a commercial application This warranty covers all material or production failures it does not include defects...

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