Husqvarna 343F, 345FX, 345FXT, 343R, 345RX Leakage testing Crankcase, To ensure a proper seal

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7

Crankshaft and crankcase

Fit the sealing rings.

505 38 17-09

Lubricate the axle spindles with engine oil and press the sealing rings until level with the crankcase using a suitable punch or tool 502 50 30-19.

The metal covers of the sealing rings should face outwards!

56

Assemble the remaining parts in the following order:

1.Cable guide and heat guard on the carburettor side of the crankcase.

2.Protective grating on the underside of the crankcase.

3.Piston and cylinder.

4.Partition on the carburettor side with attached inlet manifold.

NOTE!

If the inlet manifold has been removed, no sharp implements may be used to replace it as there is a risk that holes will be made in the inlet manifold. This would result in poor idling.

5.Generator. Make sure that the cable is pressed into the groove in the crankcase.

6.Flywheel.

7.Ignition module.

8.Muffler and heat shield.

9.Carburettor with fitted air filter holder and bushings for fuel hoses.

10.Clutch.

11.Shaft.

Leakage testing the

Leakage testing the

crankcase

crankcase

Fit the two sealing plates (A) and the

Remove the throttle cable and air filter

pressure test nipple (B).

holder from the carburettor. Fit a sealing

 

plate (A) 502 54 11-02 between the

 

carburettor and the distance piece and

 

a plate between the cylinder and the

 

heat guard plate by the muffler.

 

 

NOTE!

 

 

Press down the sealing plates as

 

 

far as possible between the bolts

 

 

to ensure a proper seal.

502 54 11-02

503 84 40-01

Fit the pressure test nipple (B)

503 84 40-01 in the spark plug hole.

 

 

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Contents English Workshop Manual Brushcutter, Trimmer Model 343R, 345RX, 343F, 345FX, 345FXT ContentsGeneral recommendations Starter ContentsDismantling 1StarterStarter AssemblyReplacing the drive dogs Electrical system Electrical system Checking the ignition spark502 71 Tip 502 50 Replacing the spark Plug cover502 54 Heated handles Drive dogsWiring diagram Electrical system Fuel system Air filter Fuel systemFuel filter Tank ventingFuel pump CarburettorDismantling Carburettor’s design Metering unitBlending unit Dismantling the carburettor Pump unitFuel system Positioned For example, the H-needle is aLittle shorter than the L-needle Assembling the carburettor Than the L-needle H-needle is a little shorterCheck carefully that the fuel hoses Are not bent or pinched whenCarburettor settings Basic settingFine adjustment Correctly adjusted carburettor Setting Recommended max. speed must not be exceededTachometer should always be used to find the optimal Idling speed T-screwAdjusting the L-needle Adjusting the H-needle Carburettor adjustment 345RX/FXThrottle RotatingCheck for wear on pins a and B Tip Page Centrifugal clutch 502 21 Centrifugal clutchDo not lose the sleeve bearings found in the clutch shoes Centrifugal clutch502 11 Clutch drumChange the bearings in the clutch housing if necessary Page Angle gear Let the small circlip around the axle remain Angle gearInput axle with pinion must be dismantled first 503 97503 80 ShaftCylinder 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 Inlet manifold Cleaning, inspectionAnalysis and actions Insufficient lubricationCause Action Piston scoring caused by heavy carbon deposits Piston ring breakage Piston damage caused by a too high engine speedCause Foreign objectsDefect Action Service tipsWear tolerances Crankshaft and crankcase Crankshaft and crankcase 502 52 Crankshaft and crankcaseInspecting Crankshaft Assembly Press down the sealing plates as Leakage testing CrankcaseFar as possible between the bolts To ensure a proper seal503 55 Husqvarna E-Tech
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