Jonsered Explore Chainsaw Troubleshooting and the History Behind CS Models

Page 53

Troubleshooting

8.1 Troubleshooting

The various faults that can affect a chainsaw are divided into four groups. In each group the likely symptoms are given on the left and possible causes are listed on the right. The most likely faults are given first, and so on.

Starting

Difficulty starting

Adjust L screw

 

Air filter blocked

 

Choke not working

 

Worn choke pivot

 

Worn choke valve

 

Fuel filter blocked

 

Fuel line blocked

 

Piston ring seized

 

Blocked impulse channel

 

 

Carburettor

Loose or faulty fuel pipe

leaking fuel

Hole in diaphragm

 

Worn needle valve

 

Needle valve assembly sticking

 

Needle valve set too high

 

Leak in metering system (air

 

or fuel)

 

Loose cover on carburettor

 

pump side

 

 

Flooding when

Worn needle valve

engine not

Needle valve set too high

running

Needle valve assembly sticking

Idling (low rpm)

 

 

 

Will not idle

Adjust L screw

 

Leaking air intake hose (rubber)

 

Loose carburettor mounting

 

bolts

 

Loose or faulty fuel hose

 

Fuel filter blocked

 

Fuel line blocked

 

Fuel tank vent blocked

 

Throttle valve pivot stiff

 

Throttle pushrod sticking

 

Defective throttle return spring

 

Bent throttle stop

 

Faulty diffuser jet

Idling too rich

Adjust L screw

 

Worn needle valve

 

Needle valve set too high

 

Worn needle valve lever

 

Leaking control diaphragm/cover

 

plate

 

Needle valve assembly sticking

 

 

Idling (low rpm) (cont.)

Idles when L

Worn needle valve

screw closed

Leaking control diaphragm/cover

 

plate

 

Needle valve assembly sticking

 

Worn needle valve lever

 

Faulty diffuser jet

 

 

Idling uneven

Fuel filter blocked

 

Fuel line blocked

 

Leaking air intake hose (rubber)

 

Loose carburettor mounting

 

bolts

 

Worn throttle valve pivot

 

Loose throttle valve screw

 

Worn throttle valve

 

Needle valve assembly sticking

 

Leak in metering system (air

 

or fuel)

 

Metering system centre knob

 

is worn

 

Hole in diaphragm

 

Leaking control diaphragm/cover

 

plate

 

Crankcase leaking

 

 

L screw requires

Fuel line blocked

constant adjust-

Needle valve set too high

ment

Needle valve assembly sticking

 

Leak in metering system (air

 

or fuel)

 

Leaking control diaphragm/cover

 

plate

 

Faulty diffuser jets

 

Crankcase leaking

 

 

Too much fuel at

Needle valve set too high

idling

Needle valve assembly sticking

 

Metering system damaged

 

Worn needle valve

 

Leaking control diaphragm/cover

 

plate

 

Metering system incorrectly

 

assembled

54 – English

Image 53
Contents 510 16 Workshop manualWorkshop manual Jonsered CS 2240 and CS 2240S Contents Index Vibration damping system Trouble shootingContents Introduction and safety instructionsGeneral Safety Target groupChanges ToolsSpecial instructions General instructionsSymbols in the Workshop Manual Symbols on the sawTechnical data Rpm Special tools 13a 13b 16b 16c 16a Service data Service data Contents Safety equipmentDismantling the chain brake Cleaning and inspectionChain brake reassembly Silencer refitting Silencer removalOperating test RefitDismantling the start/stop control Chain catcher replacementAssembling the start/stop control Stop switch resistance measurementThrottle lock, throttle trigger and return spring removal 2xA aThrottle lock, throttle trigger and return spring refitting Repair instructions Starter assembly removal Tensioning the recoil spring Changing a broken or worn starter cordReplacing a worn recoil spring Starter assembly refittingIgnition module testing Ignition module and flywheel Removal Ignition module and flywheel Refitting Centrifugal clutch removal Dismantling the oil pump and screen Centrifugal clutch refittingAir intake system removal Assembling the oil pump and screenAssembling the intake system Design CarburettorFunction Dismantling the carburettor English Cleaning and inspection Clean all units in clean petrol Assembly Pressure testing the carburettor Assemble on the saw Replacement of the L-needle Carburettor adjustment Conditions during adjustmentReplacement of the H-needle or complete car Burettor Venting the fuel tank Tank unitTest Opening pressure outward Opening pressure inwardVibration damping system Cleaning and inspection Clean and inspect all parts AssemblyReplacing the fuel hose/ return hose Replacing the fuel filterReplacing the air-purge AssemblingIf replacing the cylinder Piston and cylinder removalEnglish Piston and cylinder refitting Faults and causes Score marks on the piston aCarbon build-up B Piston ring breakageAssembling the intake system Inlet manifoldCylinder pressure testing Crankshaft complete dismantling Crankshaft bearings replacementRepairing damaged threads Crankshaft complete reassemblyReplacing the rear bar guide Replacing the bar boltReplacing the front bar guide Troubleshooting Idling low rpm TroubleshootingStarting Acceleration och retardation Troubleshooting methodsHigh rpm 2009W39

CS 2240 specifications

The Jonsered CS 2240 is a powerful and versatile chainsaw designed for homeowners, landscapers, and property maintenance professionals. It stands out in the market due to its unique combination of performance-oriented technology, ergonomic design, and ease of use.

One of the main features of the Jonsered CS 2240 is its robust engine. With a 40.9cc X-Torq® engine, this chainsaw is designed to provide efficient power and performance while minimizing fuel consumption and emissions. The X-Torq® engine technology not only enhances the chainsaw's acceleration and torque but also contributes to better fuel efficiency, making it an environmentally friendly option for users.

The CS 2240 is equipped with a 16-inch bar, which strikes a perfect balance for various cutting tasks, whether it's felling small trees, trimming branches, or performing general maintenance. This length also allows for greater maneuverability in tight spaces, making it an ideal choice for homeowners and professional users alike.

A notable aspect of the Jonsered CS 2240 is its innovative starting system. The Quick Release Air Filter ensures that the air filter can be easily accessed for maintenance, promoting optimal engine performance. Coupled with the Air Injection system, which filters out larger debris before it enters the engine, this chainsaw maintains a longer lifespan and reduces the frequency of required maintenance.

Safety is paramount in chainsaw design, and Jonsered does not compromise on that front. The CS 2240 features a chain brake, which halts the chain movement in the event of kickback. Additionally, the front handguard provides an extra layer of protection, ensuring that users can operate the saw with confidence.

The ergonomic design of the CS 2240 incorporates a comfortable handle that reduces vibrations, allowing for extended use without excessive fatigue. Weighing approximately 10.8 lbs, it strikes the right balance between power and portability.

In summary, the Jonsered CS 2240 is an excellent choice for those seeking a reliable, efficient, and user-friendly chainsaw. Its advanced engine technology, balanced bar length, safety features, and ergonomic design make it a standout in its class, ideal for tackling a variety of cutting tasks with ease and efficiency. Whether you are a casual user or a professional, the CS 2240 is well-equipped to meet diverse cutting needs while ensuring safety and comfort.