Jonsered CS 2188 manual Directional cuts, Felling cut

Page 27

WORKING TECHNIQUES

Felling

WARNING! Unless you have special ! training we advise you not to fell trees

with a diameter larger than the bar length of your saw!

Felling is done using three cuts. First you make the directional cuts, which consist of the top cut and the bottom cut, then you finish with the felling cut. By placing these cuts correctly you can control the felling direction very accurately.

Directional cuts

To make the directional cut you begin with the top cut. Aim using to the saw’s felling direction mark (1) toward a goal further forward in the terrain, where you would like the tree to fall (2). Stand on the right-hand side of the tree, behind the saw, and cut with a pull stroke.

Next make the bottom cut so that it finishes exactly at the end of the top cut.

The directional cuts should run 1/4 of the diameter through the trunk and the angle between the top cut and bottom cut should be 45°.

The line where the two cuts meet is called the directional cut line. This line should be perfectly horizontal and at right angles (90°) to the chosen felling direction.

Felling cut

The felling cut is made from the opposite side of the tree and it must be perfectly horizontal. Stand on the left side of the tree and cut on the pull stroke.

Make the felling cut about 3-5 cm (1.5-2 inches) above the bottom directional cut.

Set the spike bumper (if one is fitted) just behind the felling hinge. Use full throttle and advance the chain/bar slowly into the tree. Make sure the tree does not start to move in the opposite direction to your intended felling direction.

Drive a wedge or breaking bar into the cut as soon as it is deep enough.

Finish the felling cut parallel with the directional cut line so that the distance between them is at least 1/10 of the trunk diameter.The uncut section of the trunk is called the felling hinge.

The felling hinge controls the direction that the tree falls in.

All control over the felling direction is lost if the felling hinge is too narrow or non-existent, or if the directional cuts and felling cut are badly placed.

When the felling cut and directional cut are complete the tree should start to fall by itself or with the aid of a felling wedge or breaking bar.

We recommend that you use a bar that is longer than the diameter of the tree, so that you can make the felling cut and directional cuts with single cutting strokes. See instructions under the heading Technical data section to

English – 27

Page 26 Page 28
Image 27
Page 26 Page 28
Contents Operator′s manual English Decompression valveThe valve is KEY to SymbolsSymbols on the machine Symbols in the operator’s manualContents Dear Customer IntroductionWhat is what on the chain saw? What is WHAT?General Safety Precautions Before using a new chain sawAlways use common sense Machine′s safety equipment Personal protective equipmentChain brake and front hand guard General Safety Precautions Vibration damping system Throttle lockoutChain catcher Right hand guardGeneral rules Stop switchCutting equipment MufflerInjuries Some terms that describe the bar and chain Cutting equipment designed to reduce kickbackBar ChainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting depth gauge settingTensioning the chain Checking chain lubrication Lubricating cutting equipmentWhich could lead to serious, even fatal injuries Chain oil Filling with chain oilChain drive sprocket Needle bearing lubricationChecking wear on cutting equipment General Safety Precautions Working with the chain AssemblyFitting the bar and chain Fitting a spike bumperFuel Fuel HandlingLong-term storage Fuel safetyFuelling Transport and storageWarm engine Starting and StoppingStarting and stopping Cold engineStopping General working instructions Basic safety rulesWorking Techniques Before useJam. Always stop the engine before cleaning Terms Basic cutting techniqueLog is supported at both ends. There is a high risk LimbingClearing the trunk and preparing your retreat Tree felling techniqueSafe distance Felling directionFelling cut Directional cutsCutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Freeing a trapped treeHow to avoid kickback What is kickback?Cutting the trunk into logs Maintenance Carburettor adjustmentCarburettor with movement limiters Carburettor without movement limiters + 1/4 Checking the front hand guard Checking brake band wearImmediately Checking the inertia brake releaseMuffler Changing a broken recoil spring StarterChanging a broken or worn starter cord Tensioning the recoil springMust always be replaced Air filterSpark plug Fitting the starterNeedle bearing lubrication Adjustment of the oil pumpCentrifugal cleaning Turbo Lubricating the bar tip sprocketTemperature -5C or colder Daily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain filing and file gauges Bar and chain combinationsEC-declaration of conformity Applies to Europe onlyEN ISO 12100-22003, Cispr 121997, EN ISO Original instructions 1153188-26

CS 2188 specifications

The Jonsered CS 2188 is a powerful chainsaw designed for both professional and serious hobbyist users. Known for its robust performance and durability, it stands out in the competitive market of chainsaws. This model is well-suited for heavy-duty tasks such as felling large trees, cutting firewood, and clearing brush, making it a versatile tool for various applications.

One of the standout features of the Jonsered CS 2188 is its impressive engine performance. Equipped with a high-efficiency 2.1 kW (2.8 hp) engine, it boasts a displacement of 88 cc, allowing it to tackle even the toughest jobs with ease. The engineered design of the power unit ensures that the chainsaw delivers consistent power with a speed of up to 13,500 RPM. This performance translates to faster cutting speeds and improved productivity.

The chainsaw incorporates advanced technologies that enhance its user experience and safety. The unique Clean Power technology minimizes emissions while maximizing fuel efficiency, making it an environmentally friendly option in today's market. This feature is especially important for users conscious of their environmental impact.

Another key characteristic of the Jonsered CS 2188 is its lightweight design combined with optimal balance, which reduces fatigue during prolonged use. The chainsaw features ergonomic handles, providing users with a comfortable grip and better control. This is crucial, especially when working in challenging positions or across various terrains.

The CS 2188 is also equipped with a reliable anti-vibration system that dampens vibrations during operation, further enhancing user comfort and reducing strain on the hands and arms. This system contributes to a smoother cutting experience, allowing for precision work even during extended periods of use.

Maintenance is made simple with the tool-less chain tensioning system, which enables users to adjust the chain tension quickly and efficiently. Coupled with an easy-access air filter, these design features streamline the upkeep process, ensuring the chainsaw remains in optimal working condition.

In summary, the Jonsered CS 2188 is a powerful and dependable chainsaw tailored for users who demand performance, efficiency, and comfort. With its advanced engine technology, ergonomic design, and user-friendly maintenance features, it caters well to both professionals and enthusiasts alike, making it a top choice for anyone needing a reliable cutting tool.
Top Page Image Contents