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Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Workshop Manual Brushcutter, Trimmer

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

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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

© Copyright Husqvarna AB, Sweden 2003

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Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Workshop Manual Brushcutter, Trimmer

Contents

English Model 343R, 345RX, 343F, 345FX, 345FXT Contents Workshop Manual Brushcutter, TrimmerGeneral recommendations Contents Starter1Starter DismantlingAssembly StarterReplacing the drive dogs Electrical system 502 71 Electrical systemChecking the ignition spark Tip Replacing the spark Plug cover 502 50502 54 Drive dogs Heated handlesWiring diagram Electrical system Fuel system Fuel system Air filterTank venting Fuel filterDismantling Fuel pumpCarburettor Blending unit Carburettor’s designMetering unit Pump unit Dismantling the carburettorFuel system Little shorter than the L-needle PositionedFor example, the H-needle is a Assembling the carburettor Check carefully that the fuel hoses H-needle is a little shorterThan the L-needle Are not bent or pinched whenFine adjustment Carburettor settingsBasic setting Tachometer should always be used to find the optimal Setting Recommended max. speed must not be exceededCorrectly adjusted carburettor Idling speed T-screwThrottle Carburettor adjustment 345RX/FXAdjusting the L-needle Adjusting the H-needle RotatingCheck for wear on pins a and B Tip Page Centrifugal clutch Centrifugal clutch 502 21Centrifugal clutch Do not lose the sleeve bearings found in the clutch shoesClutch drum 502 11Change the bearings in the clutch housing if necessary Page Angle gear Angle gear Let the small circlip around the axle remain503 97 Input axle with pinion must be dismantled firstShaft 503 80Cylinder and piston Cylinder and piston Decompression valve Turn the valve the right way when fittingWhen the valve is fitted the small hole must face outwards Cleaning, inspection Inlet manifoldCause Action Analysis and actionsInsufficient lubrication Piston scoring caused by heavy carbon deposits Piston damage caused by a too high engine speed Piston ring breakageForeign objects CauseService tips Defect ActionWear tolerances Crankshaft and crankcase Crankshaft and crankcase Crankshaft and crankcase 502 52Inspecting Crankshaft Assembly Far as possible between the bolts Leakage testing CrankcasePress down the sealing plates as To ensure a proper sealHusqvarna E-Tech 503 55