Husqvarna 340, 345, 346XP,350, 351, 353 Oil pump removal 340, Oil pump -refitting 346XP, 350, 351

Page 29

Repair instructions

6

Remove the pin (B) from the adjuster screw, using a small drift to press it out.

7

Press in the pump piston (C) so that the adjuster screw (D) can be removed. Remove the pump piston.

Oil pump – removal 340, 345

1-4

See ”Oil pump – removal, models 346XP, 350, 351, 353”, points 1-4.

Remove the bolts on the anti-vibration elements on the same side.

5

Carefully lift out the oil pump from the crankcase.

6

Oil pump –refitting 346XP, 350, 351, 353

1

C

A

D B

Lubricate the pump piston (C) with chain oil and fit the pump piston and washers.

2

Press down the pump piston (C). Fit the adjuster screw and spring so that the pin (B) can be pressed into position.

3

Reconnect the oil hose and filter (A).

Model 350:

Push the crankcase up a little from the fuel tank and screw on the filter (A) from underneath.

WARNING!

Poor chain lubrication can result in failure of the chain, which could cause serious or fatal injury.

4

Push the crankcase up a little from the fuel tank and remove the filter (A) from underneath.

Cleaning and inspection

•Clean and inspect all parts carefully. If there are any cracks or other defects replace the damaged parts with new ones. Always use original parts.

•Lubricate all moving parts with chain oil.

Bolt the oil pump to the crankcase. The adjustable oil pump must be bolted to torque of 2–3 Nm.

28 – English

Page 28 Page 30
Image 29
Page 28 Page 30
Contents 340 345 346XP 350 351 Appendix A, Carburettor EPA models Workshop manual Husqvarna 340/345/346XP/350/351/353 ContentsIntroduction TroubleshootingArrangement of the manual Construction and functionSpecial instructions Safety regulationsGeneral instructions Special tools 20 a 20 b 20 cTechnical data Rpm Carburettor Construction and functionConstruction and function Idling low rpm TroubleshootingStarting Acceleration and retardation High rpmChain brake dismantling Cleaning and inspectionRepair instructions Operating test Chain brake reassemblySilencer removal Chain catcher replacementSilencer refitting RefitStop switch resistance measurement Stop switch removalChoke control removal Stop switch refittingThrottle lock, throttle trigger and return spring refitting Choke control refittingThrottle lock, throttle trigger and return spring removal Hand grip heater on model 346XPG, 351G, 353G removal Generator troubleshootingSwitch troubleshooting Troubleshooting carburettor heater 346XPG, 351G, 353G Hand grip heater on model 346XPG, 351G, 353G refitting Heater element and rear hand grip removalReplacing a broken or worn starter cord Starter assembly removalReplacing a worn recoil spring Starter assembly refittingTensioning the recoil spring Model 346XP, 351 Ignition module testingIgnition module/flywheel removal Generator refitting Replacing the generator, model 346XP, 351Ignition module and flywheel refitting Centrifugal clutch refitting Inspection and cleaningCentrifugal clutch removal Model Oil pump removal 346XP, 350, 351Oil pump -refitting 346XP, 350, 351 Oil pump removal 340Oil pump -refitting 340 Carburettor removal Adjustable oil pump adjustment 346XP, 350, 351On saws with a carburettor heater 346XPG, 351G, 353G Carburettor dismantlingCarburettor reassembly On saws with a carburettor heater 346XPG, 351G, 353G Carburettor pressure testingCarburettor refitting Carburettor heater 346XP, 351, 353 Refitting Air intake system removal Air intake system refitting Low speed jet L Carburettor adjustmentBasic requirements Carburettor correct adjustment Fine adjustment of idling speed TFuel tank removal High speed jet HReplacing the fuel hose Replacing the fuel filterFuel tank refitting Tank vent testingIf replacing the cylinder Piston and cylinder removalModels 340 Decompression valve pressure testing Piston and cylinder refitting 346XP, 350, 351 Piston and cylinder refitting 340 Cylinder pressure testingCrankcase and crankshaft dismantling 346XP, 351 Sealing ring replacement Crankshaft bearings replacement 346XP, 351Sealing ring replacement drive side Crankshaft complete dismantling 340, 345Take care to avoid damaging the crank- case Crankshaft bearings 340, 345, 350 replacementCrankcase and crankshaft reassembly 346XP, 351 Crankshaft complete 340, 345, 350 reassembly Thread insert Repairing damaged threadsGuide bar bolts replacement Replacement of the L-needle Basic adjustment for EPA II carburetorsCheck that H-needle must not rotate114 01 2003W12

340, 345, 346XP,350, 351, 353 specifications

Husqvarna is renowned for its high-quality chainsaws, and the Husqvarna 340, 345, 346XP, 350, 351, and 353 models are no exceptions. These models have garnered a reputation among both professional and amateur users for their reliability, durability, and cutting performance.

The Husqvarna 340 is an entry-level model designed for homeowners and light-duty tasks. It features a 40cc engine that provides a good balance of power and weight, making it easy to handle during extended use. The 340 is equipped with low-vibration technology, significantly reducing operator fatigue and making it suitable for less experienced users.

The Husqvarna 345 is slightly more powerful than the 340, boasting a 45.7cc engine. This model is ideal for users who require a bit more power for medium-duty tasks. It incorporates the air injection system, which helps to separate larger debris before it reaches the air filter, prolonging the life of the filter and maintaining optimal performance.

Moving up the range, the Husqvarna 346XP is a powerful professional chainsaw tailored for demanding tasks. With a 50.2cc engine and the X-Torq engine technology, it provides high cutting performance while reducing fuel consumption and emissions. The 346XP features an adjustable oil pump that allows for precise lubrication, making it an excellent choice for commercial users.

The Husqvarna 350 shares similarities with the 346XP but is designed for users who need a well-rounded saw for various applications. Its 50.2cc engine delivers ample power, and the ergonomically designed handle provides comfort during prolonged use. The chainsaw's advanced starting system ensures easy ignition, even in challenging conditions.

The 351 is another versatile option, equipped with a 50cc engine, designed for both professional and home use. It emphasizes user comfort and ease of handling. The compact design combined with features such as an efficient air filtration system makes the 351 suitable for long hours of work.

Lastly, the Husqvarna 353 is a heavy-duty model that excels in performance and longevity. It has a 50cc engine and incorporates various safety features, including a chain brake and throttle lock, to ensure safe operation. The saw also utilizes the unique anti-vibration system, minimizing vibrations that can lead to user fatigue.

In summary, the Husqvarna 340, 345, 346XP, 350, 351, and 353 models each offer distinct features catering to a wide range of users. From homeowners tackling light tasks to professionals requiring rugged performance, these chainsaws showcase Husqvarna's commitment to quality, innovation, and user-centric design.
Top Page Image Contents