Jonsered 70C, 50C manual Lubricating cutting equipment

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SAFETY INSTRUCTIONS

Lubricating cutting equipment

WARNING! Poor lubrication of cutting

!equipment may cause the chain to snap, which could lead to serious, even fatal injuries.

Chain oil

Chain oil must demonstrate good adhesion to the chain and also maintain its flow characteristics regardless of whether it is warm summer or cold winter weather.

As a chain saw manufacturer we have developed an optimal chain oil which has a vegetable oil base. We recommend the use of our own oil for both maximum chain life and to minimise environmental damage. If our own chain oil is not available, standard chain oil is recommended.

In areas where oil specifically for lubrication of saw chains is unavailable, ordinary EP 90 transmission oil may be used.

Never use waste oil! This is dangerous for yourself, the machine and the environment.

Filling with chain oil

•All our chain saws have an automatic chain lubrication system. On some models the oil flow is also adjustable.

•The sizes of the chain oil tank and fuel tank have been chosen so that the engine will run out of fuel before running out of oil. This means that you should never run with a dry chain.

However, this safety feature requires that you use the right sort of chain oil (if the oil is too thin it will run out before the fuel), and that you adjust the carburettor as recommended (a weak mixture may mean that the fuel lasts longer than the oil) and that you also use the recommended cutting equipment (a bar that is too long will use more chain oil). The above conditions also apply to chain saw models with an adjustable oil pump.

Checking chain lubrication

•Check the chain lubrication each time you refuel.

Aim the tip of the bar at a light coloured surface about 20 cm (8 inches) away. After 1 minute running at 3/4 throttle you should see a distinct line of oil on the light surface.

If the chain lubrication is not working:

•Check that the oil channel in the bar is not obstructed. Clean if necessary.

•Check that the groove in the edge of the bar is clean. Clean if necessary.

•Check that the bar tip sprocket turns freely and that the lubricating hole in the tip sprocket is not blocked. Clean and lubricate if necessary.

If the chain lubrication system is still not working after carrying out the above checks and associated measures you should contact your service agent.

Lubricating the bar tip sprocket

Lubricate the bar tip sprocket each time you refuel. Use the special grease gun and a good quality bearing grease.

Needle bearing lubrication

The clutch drum is fitted with one of the following drive sprockets:

ASpur sprocket (the chain sprocket is welded on the drum)

BRim sprocket (replaceable)

Both versions have a needle bearing on the drive shaft, which has to be greased regularly (once a week). CAUTION! Use only high quality bearing grease or engine oil.

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Contents Operator’s manual EPA KEY to Symbols Key to symbolsContents EPA Personal protective equipment Safety InstructionsMachine′s safety equipment Chain brake and front hand guard Chain catcher Stop switchThrottle lock Right hand guardChecking the front hand guard MufflerChecking brake band wear Checking the inertia brake releaseChain catcher Stop switchThrottle lock Right hand guardCutting equipment designed to minimise kickback Cutting equipmentGeneral rules MufflerSome terms that describe the bar and chain Sharpening your chain and adjusting raker clearanceChain General information on sharpening cutting teethGeneral advice on setting raker clearance Sharpening cutting teethIf the raker clearance is too large Setting the raker clearanceTensioning the chain Cause serious or even fatal injuryLubricating cutting equipment Checking wear on cutting equipment How to avoid kickbackWhat is kickback? Chain drive sprocketDo not let go of the handles General safety precautions StartingGeneral working instructions Fuel safetyBasic safety rules Transport and storageTerms Basic cutting techniqueGeneral Cutting LimbingFelling direction Tree felling techniqueSafe distance Clearing the trunk and preparing your retreatFelling cut Cutting the trunk into logs General adviceFreeing a tree that has fallen badly Freeing a trapped treeWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainChain oil Fuel HandlingFuel Fuelling Cold engine Starting and StoppingStarting and stopping Warm engineStopping Maintenance CarburettorChanging a broken or worn starter cord Correctly adjusted carburettorStarter Tensioning the recoil springMuffler Air filterSpark plug Fitting the starterWhen making adjustments Adjustment of the oil pumpCentrifugal cleaning Turbo Needle bearing lubricationWinter use Heated handlesElectrical carburettor heating CanadaBelow you will find some general maintenance instructions Daily maintenance Weekly maintenanceMonthly maintenance CS 2171/WH Technical DataTechnical data 050/1,3 mm Bar ChainLength, inches Pitch, inch Max nose radius 058/1,5mmFederal Emission Control Warranty Statement Your Warranty Rights and ObligationsPage 1088917-95

50C, 70C specifications

The Jonsered 70C and 50C chainsaws represent a pinnacle of craftsmanship and engineering excellence in the world of power tools. Designed for both professional and avid DIY enthusiasts, these models offer a blend of power, performance, and user-friendly features that elevate the cutting experience.

At the heart of both the Jonsered 70C and 50C is their powerful engine output. The 70C boasts a robust 70cc engine, delivering high torque and efficiency for demanding tasks, while the 50C is equipped with a nimble 50cc engine, perfect for lighter, more agile cutting projects. This versatility makes the chainsaws suitable for a wide range of activities, from felling trees to limbing and pruning, ensuring that they cater to varying user requirements.

One notable feature of the Jonsered 70C and 50C is their advanced air filtration systems. These systems are designed to enhance the longevity of the chainsaw's engine by preventing dust and debris from entering the combustion area. This means less maintenance and more time spent operating the chainsaw, making it an ideal choice for both professional lumberjacks and casual users.

Ergonomically designed, the handle of both models offers excellent grip and comfort, reducing user fatigue during extended use. The lightweight construction of the saws enables effortless maneuverability and control, allowing users to execute precise cuts without strain. Additionally, the quick and easy chain tensioning system facilitates fast adjustments, ensuring that the chain remains in optimal condition for continuous cutting.

Safety features are paramount in the design of the Jonsered 70C and 50C. Each model incorporates a chain brake and throttle lock to enhance user safety while operating, minimizing risks associated with kickback and accidental starts. The designs also emphasize low vibration, which further protects the user's hands and arms from fatigue, promoting a safer and more enjoyable cutting experience.

With their blend of power, efficiency, and advanced technology, the Jonsered 70C and 50C chainsaws are exceptional tools for anyone seeking reliability and performance in the field. Whether for professional logging or home landscaping, these chainsaws embody the quality and innovation expected from the Jonsered brand.
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