502 52 | Husqvarna 343F, 345FX, 345FXT, 343R, 345RX guide

Crankshaft and crankcase

7

Separate the crankcase halves.

502 52 39-01

Push out the crankshaft from the crankcase half.

Remove the bearing and sealing rings from the crankcase halves.

505 38 17-09

Fit tool 502 52 39-01 to the clutch side of the crankcase as illustrated.

Separate the crankcase halves.

Fit tool 502 52 39-01 as illustrated.

Push out the crankshaft from the crankcase half.

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

Knock the halves against a wooden block so that the bearings fall out of their seats.

Remove the gaskets with a suitable punch.

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Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Crankshaft and crankcase, 502 52

Contents

English Model 343R, 345RX, 343F, 345FX, 345FXT Contents Workshop Manual Brushcutter, Trimmer General recommendations Contents Starter 1Starter Dismantling Assembly Starter Replacing the drive dogs Electrical system Electrical system Checking the ignition spark502 71 Tip Replacing the spark Plug cover 502 50 502 54 Drive dogs Heated handles Wiring diagram Electrical system Fuel system Fuel system Air filter Tank venting Fuel filter Fuel pump CarburettorDismantling Carburettor’s design Metering unitBlending unit Pump unit Dismantling the carburettor Fuel system Positioned For example, the H-needle is aLittle shorter than the L-needle Assembling the carburettor Check carefully that the fuel hoses H-needle is a little shorterThan the L-needle Are not bent or pinched when Carburettor settings Basic settingFine adjustment Tachometer should always be used to find the optimal Setting Recommended max. speed must not be exceededCorrectly adjusted carburettor Idling speed T-screw Throttle Carburettor adjustment 345RX/FXAdjusting the L-needle Adjusting the H-needle Rotating Check for wear on pins a and B Tip Page Centrifugal clutch Centrifugal clutch 502 21 Centrifugal clutch Do not lose the sleeve bearings found in the clutch shoes Clutch drum 502 11 Change the bearings in the clutch housing if necessary Page Angle gear Angle gear Let the small circlip around the axle remain 503 97 Input axle with pinion must be dismantled first Shaft 503 80 Cylinder and piston Cylinder and piston Turn the valve the right way when fitting When the valve is fitted the small hole must face outwardsDecompression valve Cleaning, inspection Inlet manifold Analysis and actions Insufficient lubricationCause Action Piston scoring caused by heavy carbon deposits Piston damage caused by a too high engine speed Piston ring breakage Foreign objects Cause Service tips Defect Action Wear tolerances Crankshaft and crankcase Crankshaft and crankcase Crankshaft and crankcase 502 52 Inspecting Crankshaft Assembly Far as possible between the bolts Leakage testing CrankcasePress down the sealing plates as To ensure a proper seal Husqvarna E-Tech 503 55