Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Assembly

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Crankshaft and crankcase

7

Check that the there is no play in the fill-out plates around the crank disks (applies to models FX/FXT, RX).

Assembly

Mount the bearings in the crankcase halves.

First fit the crankshaft in the clutch-side crankcase half.

502 50 30-19

Fit a new gasket to the clutch-side crankcase half.

Pull the other crankcase half into position and tighten the 4 crankcase bolts.

502 50 30-19

Check that the there is no play in the fill-out plates around the crank disks (applies to models FX/FXT, RX).

Assembly

Heat the crankcase halves to approx. 150°C using a hot air gun and position the bearings.

Make sure they go right down into the bearing seats.

Lubricate the big-end bearing with a few drops of engine oil and position the crankshaft in the clutch-side crankcase half.

Pull the crankshaft into place with tool no. 502 50 30-19.

Make sure that the connecting rod is not squeezed against the crankcase!

Fit a new gasket to the clutch-side crankcase half.

Place the other crankcase half over the crankshaft and place the 4 crankcase bolts so that they guide the gasket.

Pull the crankcase half into place with tool no. 502 50 30-19.

Tighten the crankcase bolts.

Check that the crankshaft can rotate easily. If not, hit the axle spindles sharply a few times with a rubber hammer so that the tension in the crankshaft disappears.

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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 H-needle is a little shorter Than the L-needleCheck carefully that the fuel hoses Are not bent or pinched whenFine adjustment Carburettor settingsBasic setting Setting Recommended max. speed must not be exceeded Correctly adjusted carburettorTachometer should always be used to find the optimal Idling speed T-screwCarburettor adjustment 345RX/FX Adjusting the L-needle Adjusting the H-needleThrottle 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 Leakage testing Crankcase Press down the sealing plates asFar as possible between the bolts To ensure a proper sealHusqvarna E-Tech 503 55