Husqvarna 343R, 345RX, 343F, 345FX, 345FXT manual Tank venting, Fuel filter

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Fuel system

3

Impregnate the filter with air filter oil.

531 00 60-76

Tank venting

Check that the tank venting valve works correctly.

Replace the fuel cap if the valve is faulty.

531 03 06-23

Fuel filter

The fuel filter can be removed through the tank’s fill hole.

502 50 83-01

Impregnate the filter with air filter oil.

Tip!

Place the filter in a plastic bag and pour about a tablespoon of air filter oil no. 531 00 60-76 into the bag.

Massage the oil into the air filter.

Tank venting

Tank venting takes place through the fuel cap and needs to be functional for the engine to work.

•Remove the fuel hose from the carburettor and empty the fuel from the tank.

•Connect the fuel hose to pressure tester no. 531 03 06-23.

•Pump up a pressure and vacuum of 50 kPa (0.5 bar) in the tank.

•The pressure should sink to 20 kPa or return to normal pressure within 45 seconds.

The fuel cap can be taken apart for cleaning.

Use a screwdriver and prise off the housing (A) that contains a rubber diaphragm (B) and a filter (C).

Knock the housing against a tabletop so that the cover (D) over the dia- phragm falls off.

Blow the filter (C) clean, and the sintered filter (E), with compressed air and mount the fuel cap in the reverse order to how it was disassembled.

Make sure that the flat surface on the cover (D) is turned towards the dia- phragm.

Fuel filter

The fuel hose in the tank contains a fuel filter. It is accessible through the fill hole. Pull out the filter with your fingers or with help of tool 502 50 83-01.

NOTE!

The fuel filter can snag under the shaft bushing in the tank. With the aid of a long screwdriver, loosen the filter. Do not pull on the hose, since it can easily be pulled from the filter.

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Contents 343R 345RX 343F 345FX 345FXT Model 343R, 345RX, 343F, 345FX, 345FXT Contents Workshop Manual Brushcutter, TrimmerGeneral recommendations Contents Starter1Starter DismantlingAssembly StarterReplacing the drive dogs Electrical system Electrical system Checking the ignition spark502 71 Tip Replacing the spark Plug cover 502 50502 54 Drive dogs Heated handlesWiring diagram Electrical system Fuel system Fuel system Air filterTank venting Fuel filterFuel pump CarburettorDismantling Carburettor’s design Metering unitBlending unit Pump unit Dismantling the carburettorFuel 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 whenCarburettor 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-screwThrottle Carburettor adjustment 345RX/FX Adjustment 345RX/FXAdjusting the L-needle Adjusting the H Needle 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 Turn the valve the right way when fitting When the valve is fitted the small hole must face outwardsDecompression valve Cleaning, inspection Inlet manifoldAnalysis and actions Insufficient lubricationCause Action 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 Far as possible between the bolts Leakage testing CrankcasePress down the sealing plates as To ensure a proper sealHusqvarna E-Tech 503 55Page Tools List of tools 503 80 502 50 502 50 502 52503 97 502 50 505 38 503 84 503 55114 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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