Workshop manual 340 345 346XP 350 351 353

Workshop Manual 340 345 346xp 350 351 353-Free PDF

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Workshop manual,Husqvarna 340 345 346XP 350 351 353. Introduction 2,Safety regulations 3,General instructions 3. Special instructions 3,Special tools 4,Technical data 6. Construction and function 8,Carburettor 8,Troubleshooting 10. Repair instructions 12,Chain brake 12,Silencer 14,Chain catcher 14.
Stop switch 15,Stop switch resistance measurement 15. Choke control 16,Throttle trigger 17,Hand grip heater 18. Starter assembly 21,Starter cord 21,Recoil spring 22. Ignition module testing 23,Ignition module and flywheel 23. Generator 24,Centrifugal clutch 26,Oil pump 27,Carburettor 30.
Carburettor pressure testing 33,Carburettor heater 34. Air intake system 35,Carburettor adjustment 37,Fuel tank 38. Fuel filter 39,Fuel hose 39,Piston and cylinder 41. Decompression valve pressure testing 42,Cylinder pressure testing 44. Crankcase and crankshaft 45,Crankshaft bearings 46.
Repairing damaged threads 49,Thread insert 49,Guide bar bolts 49. Appendix A Carburettor EPA models 50,Introduction,Arrangement of the manual Troubleshooting. This workshop manual can be used in two different These pages describe the most common faults that. ways affect a chainsaw They are divided into four,different groups with the most likely faults de. To repair a specific sub assembly on a chainsaw scribed first. To dismantle and reassemble a complete,Repair instructions. Repairing a specific sub assembly The section that describes how to repair the. If a specific sub assembly on the chainsaw needs chainsaw consists of detailed step by step instruc. to be repaired tions It explains in detail the special tools lubri. cants and bolt torques that are needed when, 1 Look up the page referring to the relevant sub working on each component.
2 Follow the instructions under the headings,Removal Dismantling. Cleaning and inspection,Refitting Reassembly,This workshop manual covers the following. Dismantling and reassembling the entire chainsaw models. chainsaw 340, If the entire chainsaw is to be dismantled follow 346XP. the instructions under the heading Removal 350,Dismantling 351. Work through the manual and follow the instruc,tions given in each section under the heading.
Removal Dismantling,Then follow all the Cleaning and inspection. instructions in each section, Working from the back of the manual follow all the. instructions under the headings Refitting,Reassembly in reverse order. Each of the sections covering removal dismantling,and refitting reassembly include the relevant. lubrication instructions and bolt torques for each. stage of repair,Construction and function,This chapter gives a simple description of the.
chainsaw carburettor and its various parts,Safety regulations. General instructions Special instructions, This workshop manual gives detailed instructions The fuel that is used in a chainsaw poses the. on how to troubleshoot repair and test a chainsaw following hazards. This section also describes the various safety, precautions that should be taken when carrying out The fuel and its fumes are toxic. May cause irritation to skin or eyes, The workshop manual has been written for person May cause breathing difficulties. nel who are assumed to have general experience Highly flammable. of repairing and servicing chainsaws, Workshops where chainsaws are repaired must be When using compressed air the air jet should.
equipped with safety equipment that meets local never be pointed at the body Air can be forced into. regulations the bloodstream and cause fatal injury. No one should carry out repairs on a chainsaw Wear ear protection when testing saws. until they have read and understood the contents, of this workshop manual After testing a saw do not touch the silencer until it. has cooled down The silencer gets very hot and, Chainsaws are type approved to meet the relevant you may burn yourself Wear protective gloves. safety legislation but this only applies when the when working on the silencer. saw is fitted with the cutting equipment specified in. the user s manual The fitting of any other equip The guide bar chain and clutch cover chain brake. ment or of accessories or parts that are not must be fitted before the saw is started If not the. approved by Jonsered could mean that the saw no clutch may come loose and cause injury. longer meets these safety requirements and the, person who carried out the work may be held Poor chain lubrication can result in failure of the. responsible for its non conformance chain which could cause serious or fatal injury. In this workshop manual the following boxes Take care to ensure that the spring inside the. indicate where caution should be taken starter assembly does not fly out and cause injury. Wear eye protection If the spring is under com, pression when the pulley is removed it could fly out. WARNING and cause injury,The warning text warns of the risk.
of personal injury if the instruc Before removing the tensioning spring from the. tions are not followed chain brake ensure that the brake is in the on. position otherwise the spring may fly out and,cause injury. After completing the repair the chain brake must be. tested see Chain brake reassembly Operating,The warning text warns of the risk of test. material damage if the instructions are, not followed Always consider the fire risk A chainsaw can. produce sparks that could start a fire,Inspect the chain catcher and replace it if it is. Special tools,Special tools,Item Description Used for Order no.
1 Clutch tool Centrifugal clutch 502 54 16 01,2 Piston stop Locking crankshaft 502 54 15 01. 3 Stop plate Locating intake gaiter 502 54 17 01 20 a. 4 Fuel filter hook Withdrawing the fuel filter 502 50 83 01. 5 Allen key For M5 bolts 502 50 18 01,6 Puller Frame bearing 504 90 90 02. 7 Removal tool Remove seal from clutch side 502 50 55 01 21. 8 Mandrel sealing ring Removing crankshaft 502 54 21 01. 9 Cover plate Sealing during pressure testing 502 54 11 02. 10 Pressure tester Connection to cylinder 503 84 40 02. 11 Feeler gauge Adjusting ignition module 502 51 34 02. 12 Clamp stand Clamping the saw 502 51 02 01 22, 13 Pressure gauge Pressurisation during testing 502 50 38 01. 14 Piston fitting kit Fitting piston 502 50 70 01, 15 Test plug Checking ignition module 502 71 13 01. 16 Rev counter Adjusting carburettor 502 71 14 01,17 Removal tool Removing crankshaft 502 51 61 01.
18 Vacuum gauge Vacuum test 502 50 37 01 23, 19 Assembly pliers Fitting spark plug guard 502 50 06 01. 20a Sleeve Fitting crankshaft 502 50 30 18,20b Shaft extension Flywheel side 502 50 30 18. 20c Shaft extension Clutch side 502 50 30 18,21 Stop plate Removing crankshaft 502 54 18 01. 22 Assembly tool Assembling spring chain brake 502 50 67 01. 23 Crankshaft tool Fitting crankshaft seal 502 50 30 16. Technical data,Displacement Cylinder bore Stroke Max power speed. cm3 cubic inches mm inches mm inches kW hp rpm,340 40 8 2 44 40 1 57 32 1 28 2 0 2 7 9 000.
345 45 0 2 75 42 1 65 32 1 28 2 2 3 0 9 000,346XP G 45 0 2 75 42 1 65 32 1 28 2 5 3 4 9 600. 350 49 4 3 01 44 1 73 32 1 28 2 3 3 1 9 000,350 EPA 51 7 3 15 45 1 77 32 1 28 2 3 3 1 9 000. 351 G 49 4 3 01 44 1 73 32 1 28 2 3 3 1 9 000,353 G 51 7 3 15 45 1 77 32 1 28 2 4 3 3 9 000. Spark plug gap Ignition system Air gap Carburettor type. mm inches mm inches,340 0 5 0 02 SEM CD 0 3 0 012 Walbro HDA 195. 345 0 5 0 02 SEM CD 0 3 0 012 Walbro HDA 195,346XP G 0 5 0 02 SEM CD 0 3 0 012 Zama C3 EL17.
350 0 5 0 02 SEM CD 0 3 0 012 Walbro HDA 195,350 EPA 0 5 0 02 SEM CD 0 3 0 012 Zama C3 EL18. 351 G 0 5 0 02 SEM CD 0 3 0 012 Zama C3 EL17,353 G 0 5 0 02 SEM CD 0 3 0 012 Zama C3 EL17. Effective cutting length Chain speed at Chain pitch Drive link. cm inches max power revs mm inches mm inches, 340 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. 345 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. 346XP G 30 48 12 19 18 5 9 600 8 25 0 325 1 3 0 050 1 5 0 058. 350 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. 350 EPA 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. 351 G 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. 353 G 30 48 12 19 17 3 9 000 8 25 0 325 1 3 0 050 1 5 0 058. Technical data, Idling speed Engagement speed Max speed Spark plug. rpm rpm rpm, 340 2 700 3 800 12 500 NGK BPMR 7A Champion RCJ 7Y.
345 2 700 3 800 12 500 NGK BPMR 7A Champion RCJ 7Y. 346XP G 2 700 3 800 14 200 NGK BPMR 7A Champion RCJ 7Y. 350 2 700 3 800 13 000 NGK BPMR 7A Champion RCJ 7Y. 350 EPA 2 700 3 800 13 000 NGK BPMR 7A Champion RCJ 7Y. 351 G 2 700 3 800 13 000 NGK BPMR 7A Champion RCJ 7Y. 353 G 2 700 3 800 13 000 NGK BPMR 7A Champion RCJ 7Y. Fuel tank capacity Oil pump capacity at Oil tank capacity Automatic oil pump. Litres US pints 8 500 rpm Litres US pints,340 0 5 1 05 9 0 25 0 53 Yes. 345 0 5 1 05 9 0 25 0 53 Yes,346XP G 0 5 1 05 5 12 0 28 0 59 Yes. 350 0 5 1 05 5 12 0 26 0 55 Yes,350 EPA 0 5 1 05 5 12 0 26 0 55 Yes. 351 G 0 5 1 05 5 12 0 28 0 59 Yes,353 G 0 5 1 06 5 12 0 28 0 59 Yes. Weight without bar and chain Weight with bar and chain Heated hand grips. kg lbs kg lbs,340 4 7 10 3 5 5 12 1,345 4 7 10 3 5 5 12 1.
346XP 4 8 10 6 5 6 12 2,346XPG 4 9 10 8 5 7 12 4 Yes. 350 4 8 10 6 5 6 12 2,350 EPA 4 8 10 6 5 6 12 2,351 4 8 10 6 5 6 12 2. 351G 4 9 10 8 5 7 12 4 Yes,353 5 0 11 0 5 8 12 6,353G 5 1 11 2 5 9 13 0 Yes. Construction and function, Carburettor The carburettor works in different ways depending. on the setting,The carburettor consists of three sub systems.
Cold start mode,Idling mode,Part throttle mode,Full throttle mode. The metering unit A which contains the jets,and the fuel control mechanism This measures. out the right amount of fuel to suit the speed of,the saw and the power demand. In the cold start mode the choke valve D is,completely closed This increases the vacuum in. The mixing unit B consists of the choke the carburettor so that fuel is sucked through the. diffuser jets and throttle valve This is where the diffuser jets faster E. air and fuel are mixed to create a flammable,The pump unit C pumps fuel from the tank to.
the metering system inside the carburettor One,side of the pump diaphragm is connected to the. crankcase and pulses as a result of pressure,changes in the crankcase The other side of the. diaphragm sucks in the fuel, In idling mode the throttle valve F is closed Air is. sucked through an aperture in the throttle valve, and a small amount of fuel is supplied through the. diffuser jet E,Construction and function,In part throttle mode the throttle valve F is par.
tially open Fuel is supplied through the diffuser jets. In full throttle mode both valves are open and fuel. is supplied through all the diffuser jets E,Troubleshooting. The various faults that can affect a chainsaw are divided into four groups In each group the likely symp. toms are given on the left and possible causes are listed on the right The most likely faults are given first. Starting Idling low rpm cont, Difficulty starting Adjust L screw Idles when L Worn needle valve. Air filter blocked screw closed Leaking control diaphragm. Choke not working cover plate,Worn choke pivot Needle valve assembly sticking. Worn choke valve Worn needle valve lever,Fuel filter blocked Faulty diffuser jet. Fuel line blocked, Piston ring seized Idling uneven Fuel filter blocked.
Blocked impulse channel Fuel line blocked,Leaking air intake hose rubber. Carburettor Loose or faulty fuel pipe Loose carburettor mounting. leaking fuel Hole in diaphragm bolts,Worn needle valve Worn throttle valve pivot. Needle valve assembly sticking Loose throttle valve screw. Needle valve set too high Worn throttle valve,Leak in metering system air Needle valve assembly. or fuel sticking, Loose cover on carburettor Leak in metering system air. pump side or fuel,Metering system centre knob,Flooding when Worn needle valve is worn.
engine not Needle valve set too high Hole in diaphragm. running Needle valve assembly sticking Leaking control diaphragm. cover plate,Crankcase leaking,Idling low rpm,L screw requires Fuel line blocked. Will not idle Adjust L screw constant Needle valve set too high. Leaking air intake hose adjustment Needle valve assembly sticking. rubber Leak in metering system air,Loose carburettor mounting or fuel. bolts Leaking control diaphragm,Loose or faulty fuel hose cover plate. Fuel filter blocked Faulty diffuser jets,Fuel line blocked Crankcase leaking. Fuel tank vent blocked, Throttle valve pivot stiff Too much fuel at Needle valve set too high.
Throttle pushrod sticking idling Needle valve assembly sticking. Defective throttle return spring Metering system damaged. Bent throttle stop Worn needle valve,Faulty diffuser jet Leaking control diaphragm. cover plate, Idling too rich Adjust L screw Metering system incorrectly. Worn needle valve assembled,Needle valve set too high. Worn needle valve lever,Leaking control diaphragm,cover plate. Needle valve assembly,10 English,Troubleshooting,High rpm Acceleration and retardation.
Will not run at Adjust H screw Does not Adjust L screw. full throttle Blocked air filter accelerate Adjust H screw. Repair instructions The section that describes how to repair the chainsaw consists of detailed step by step instruc tions It explains in detail the special tools lubri cants and bolt torques that are needed when working on each component This workshop manual covers the following chainsaw models 340 345 346XP 350 351 353

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