Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Centrifugal clutch, 502 21

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4

Centrifugal clutch

 

 

 

 

 

 

 

The centrifugal clutch has the task of transferring the

Some slipping occurs between the clutch and the

 

power from the engine to the cutting equipment’s drive

clutch drum when accelerating as well as in the

 

axle. As the name implies, it works according to a cen-

reversed situation when the cutting equipment jams.

 

trifugal principle.

 

Thereby preventing abnormal load changes on the

 

This means the clutch’s friction shoes are thrown out-

crankshaft.

 

The engagement speed has been carefully tested so

 

wards towards the clutch drum at a certain engine speed.

 

When the friction against the drum is sufficiently great it

that the engine can idle without the cutting equip-

 

drives the drive shaft at the same speed as the engine.

ment’s drive shaft rotating.

 

 

 

 

 

 

 

 

Dismantling

Dismantle the cable protector, loosen bolts (A) and (B).

Move the fuel tank so far forward that the fuel hoses (C) and (D) can be removed.

Remove the 4 bolts holding the clutch cover.

Dismantle the vibration dampers for better access.

Dismantling

The clutch is located between the fuel tank and the engine.

In order to be accessible, the tank and handle holder must be moved forward on the shaft.

1.Dismantle the cable protector.

2.Loosen bolts (A) and (B).

3.Move the fuel tank so far forward that the fuel hose (C) becomes accessible.

Move the O-ring back and remove the hose from the nipple.

Also remove the fuel hose (D) from the nipple on the tank.

Move the fuel tank further forward and remove the 4 bolts holding the clutch cover to the engine.

Remove the vibration dampers from their plugs in order to facilitate disman- tling.

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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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