Manuals / Husqvarna / Lawn and Garden / Brush Cutter

Husqvarna manual Model 343R, 345RX, 343F, 345FX, 345FXT Contents

Models: 343R, 345RX, 343F, 345FX, 345FXT

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Workshop Manual

Brushcutter, Trimmer

Model 343R, 345RX, 343F, 345FX, 345FXT

Contents

General recommendations ___________________ 2

1.Starter __________________________________ 3

2.Electrical system _________________________ 7

3.Fuel system _____________________________ 15

4.Centrifugal clutch ________________________ 31

5.Angle gear ______________________________ 37

6.Cylinder and piston ______________________ 41

7.Crankshaft and crankcase _________________ 51

8.Tools ___________________________________ 59

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Contents

Workshop manual English343R 345RX 343F 345FX 345FXT 1.Starter __________________________________ Model 343R, 345RX, 343F, 345FX, 345FXT ContentsGeneral recommendations ___________________ 2.Electrical system _________________________Special tools General recommendationsRemember Fire riskContents 1 StarterDismantling 1StarterDismantling Assembly AssemblyStarter Replacing the drive dogs Replacing the drive dogs1Starter Assembly _________________________________ Electrical systemContents Checking the ignition spark ____________________502 71 Electrical systemChecking the ignition spark Checking the ignition sparkElectrical system 502 50 Replacing the sparkplug cover Electrical systemDismantling 502 54Electrical system DismantlingDo not pry off the heating element Drive dogsHeated handles before the locking catch has beenWiring diagram Electrical systemElectrical system Assembly _________________________________ Fuel systemContents Carburettor settings _________________________Air filter Fuel systemAir filter Massage the oil into the air filter Tank ventingFuel filter Fuel systemDismantling Fuel pumpCarburettor Fuel systemThe blending unit The carburettor’s designThe metering unit Fuel systemFuel system The pump unitDismantling the carburettor The pump unitFuel system In the event of leakage – remove the needle valveFor example, the H-needleis a Note how the jets arepositioned little shorter than the L-needleFuel system Assembling the carburettorUse Loctite on the valve screws Assembling the carburettorthan the L-needle are not bent or pinched when theThe H-needleis a little shorter Check carefully that the fuel hosesFine adjustment Carburettor settingsBasic setting FunctionThe recommended max. speed must not be exceeded settingCorrectly adjusted carburettor Idling speed T-screwAdjusting the L-needle Carburettor adjustment 345RX/FXadjustment 345RX/FX Adjusting the HCheck for wear on pins A and B Fuel systemDisassemble the throttle control A, the lock to prevent accidental throttle operation B, the start throttle lock C and the throttle stop D in order to check if replacement is necessary Fuel systemPage Assembly _________________________________ 4 Centrifugal clutchContents Dismantling ________________________________Dismantling Centrifugal clutch502 21 DismantlingCentrifugal clutch 502 54Assembly Clutch drum502 11 AssemblyChange the bearings in the clutch housing if necessary Centrifugal clutchPage Assembly _________________________________ 5 Angle gearContents Dismantling ________________________________Dismantling Angle gearLet the small circlip around the axle remain DismantlingAngle gear 503 97Assembly Angle gear Shaft503 80 ShaftCleaning, inspection _________________________ 6 Cylinder and pistonContents Assembly _________________________________Cylinder and piston DismantlingCylinder and piston Turn the valve the right way when fittingDecompression valve Decompression valveInlet manifold Cleaning, inspectionmanifold is fitted using a Exercise caution if the inletCause Analysis and actionsInsufficient lubrication ActionCause Piston scoring caused by heavy carbon depositsCylinder and piston ActionPiston ring guide pin Piston damage caused by a too high engine speedPiston ring breakage Damage caused byCause Foreign objectsCylinder and piston ActionBe careful with the lower edge of the piston ring Service tipsDefect groove. If this is damaged, or if carbon depositsPiston ring gap Wear tolerancesCylinder bore Piston ring grooveAssembly _________________________________ 7 Crankshaft and crankcaseContents Leakage testing the crankcase _________________Dismantling Crankshaft and crankcaseDismantling Crankshaft and crankcase 502 52Crankshaft and crankcase Inspecting thecrankshaft Inspecting theCrankshaft and crankcase AssemblyAssembly 502 50Press down the sealing plates as Leakage testing thecrankcase far as possible between the boltsCrankshaft and crankcase Husqvarna E-Tech503 55 Page Starter __________________________________ ToolsContents Electrical systemStarter List of tools505 38 ElectricalCrankshaft List of toolsgear Workshop114 2003W24