Husqvarna 343R, 345RX, 343F, 345FX, 345FXT manual General recommendations

Page 3

General recommendations

Remember:

Special tools

! Never start the engine without the clutch and clutch drum

Certain tasks in this handbook require the use of special

mounted.

tools. In sections where this is applicable, an image of the

! Do not grasp hot elements such as the muffler or the clutch

tool with an ordering number is provided.

before they have cooled sufficiently to avoid burn injuries.

We recommend using special tools in order to avoid personal

! Avoid getting petrol on you skin or in your mouth. Use

injury and to eliminate expensive damage to the components

protective cream on your hands. This lowers the risk of

in question.

infection and makes dirt easier to wash off. Long-term

 

contact with engine oil can be damaging to your health.

 

! Never run the engine indoors. The engine exhaust is poisonous!

 

! Wipe up any spilled oil from the floor immediately in order to

 

avoid injuries from slipping.

 

! Do not use tools that are worn or fit poorly on nuts and bolts

 

and so on.

 

+ Always work on a clean work surface.

+Always work in a logical manner in order to be sure that all components are correctly attached and that nuts and bolts

are tightened.

+ Use special tools where recommended in order to work correctly.

502 51 03-01

Fire risk

Handle petrol with respect, since it is highly flammable.

Do not smoke and ensure that there are no open flames or sparks in the vicinity.

Make sure that there is a functioning fire extinguisher in the vicinity.

Do not try to extinguish a petrol fire with water.

Poisonous fumes

When using cleaning fluids, read the instructions carefully.

Make sure that ventilation is good when handling petrol, trichlo- roethylene and other highly volatile liquids.

The engine exhaust is poisonous. Test run the engine only if ventilation is good. Preferably outside.

!WARNING!

Risk of personal injury if the instructions are not followed.

Sealing faces and gaskets

Make sure that all sealing faces are clean and free from old gasket remnants. Use a tool that will not damage the sealing face when it is cleaned. Any scratches and irregularities should be removed with a fine, float-cut file.

Sealing rings

Always change a sealing ring once it has been dismounted. The sensitive sealing lips can be easily damaged with poor sealing ability as a result. The surfaces that the seal is to tighten against must also be completely free from damage. Lubricate the sealing lip with grease before it is attached and make sure that it is not damaged by such things as the collars and splines on an axle. Use tape or a conical bushing as protection. It is important that the sealing ring is turned correctly in order for it to function as intended.

NOTE!

Material damage may occur if the instructions are not followed.

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Contents 343R 345RX 343F 345FX 345FXT 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 Are not bent or pinched when H-needle is a little shorterThan the L-needle Check carefully that the fuel hosesCarburettor settings Basic settingFine adjustment Idling speed T-screw Setting Recommended max. speed must not be exceededCorrectly adjusted carburettor Tachometer should always be used to find the optimalRotating Carburettor adjustment 345RX/FX Adjustment 345RX/FXAdjusting the L-needle Adjusting the H Needle ThrottleCheck 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 To ensure a proper seal Leakage testing CrankcasePress down the sealing plates as Far as possible between the bolts503 55 Husqvarna E-TechPage Tools List of tools 503 84 503 55 502 50 502 52503 97 502 50 505 38 503 80 502 50114 01 2003W24

343R, 345RX, 343F, 345FX, 345FXT specifications

The Husqvarna 343R, 345RX, 343F, 345FX, and 345FXT are designed for efficiency and performance in demanding outdoor tasks. Each model stands out with unique features and technologies tailored to meet various needs, from professional landscaping to residential gardening.

Starting with the Husqvarna 343R, this versatile trimmer is well-known for its lightweight design and powerful performance. It is equipped with a 34 cc engine that delivers a reliable power-to-weight ratio, making it ideal for extended periods of use without excessive fatigue. The 343R features a simple start system, ensuring an easy ignition, while its Tap 'n Go trimmer head permits effortless line feeding, enhancing productivity.

Moving on to the Husqvarna 345RX, this model is favored by professionals for its robust build and advanced technology. Powered by a 45.7 cc engine, it provides superior cutting power suited for heavy-duty tasks. The 345RX comes with an ergonomic handle and a comfortable harness that allows for better weight distribution, which reduces strain during long work sessions. Additionally, the machine's X-Torq engine technology reduces fuel consumption and emissions, making it an environmentally friendly option.

The Husqvarna 343F offers a modest yet efficient powerhouse with its 34 cc engine. It is user-friendly, making it an excellent choice for recreational users or those new to outdoor maintenance. This model features an adjustable handle to accommodate various cutting angles, enhancing versatility according to the user's preference.

Next is the Husqvarna 345FX, an exceptional tool for professional use, boasting a high-performing 45.7 cc engine. The 345FX incorporates advanced vibration dampening technology, resulting in reduced operator fatigue during lengthy operations. Its advanced cutting attachments provide versatility for tackling different vegetation types, enhancing user experience.

Finally, the Husqvarna 345FXT merges performance with functionality. Like the 345FX, it features a 45.7 cc engine with exceptional power, but comes with additional features such as an easy-to-adjust harness and advanced cutting heads. This model is particularly suited for demanding tasks, offering extended run time and increased efficiency.

In summary, Husqvarna’s 343R, 345RX, 343F, 345FX, and 345FXT trimmers are engineered with cutting-edge technologies. Each offers unique features that cater to the distinct needs of both casual users and professionals. These models ensure optimal performance, efficiency, and comfort, making them excellent choices for various outdoor maintenance tasks.
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