Husqvarna 435 manual Felling cut

Page 28

WORKING TECHNIQUES

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

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 find out which lengths of bar are recommended for your saw.

There are methods for felling trees with a diameter larger than the bar length. However these methods involve a much greater risk that the kickback zone of the bar will come into contact with the tree.

28 – English

115 10 82-95 Rev.2 2008-04-11

Image 28 Contents
435 435e 440e KEY to Symbols Symbols on the machineSymbols in the operator’s manual You will find the following labels on your chain sawContents Introduction Dear customerWhat is WHAT? What is what on the chain saw?General Safety Precautions Before using a new chain sawMachine′s safety equipment Always use common sensePersonal protective equipment Chain brake and front hand guardGeneral Safety Precautions Throttle lockout Chain catcherStop switch Right hand guardVibration damping system MufflerCutting equipment General rulesCutting equipment designed to reduce kickback BarSharpening your chain and adjusting depth gauge setting General information on sharpening cutting teethGeneral advice on adjusting depth gauge setting Increased if the depth gauge setting isAdjustment of depth gauge setting Too largeTensioning the chain Bar and cause serious or even fatal injury435 435e, 440eFilling with chain oil Lubricating cutting equipmentChecking chain lubrication Needle bearing lubrication Chain drive sprocketChecking wear on cutting equipment Assembly Fitting the bar and chain435 435e, 440e115 10 82-95 Rev.2 Fuel Handling FuelFuel safety FuelingTransport and storage Long-term storageStarting and stopping Starting and StoppingStarting Stopping Basic safety rules Working TechniquesBefore use General working instructions General rules Basic cutting technique TermsTree felling technique LimbingLog is supported at one end. There is a high risk Safe distanceClearing the trunk and preparing your retreat Felling directionDirectional cuts Felling cut What is kickback? How to avoid kickbackFreeing a tree that has fallen badly Cutting the trunk into logs Carburetor adjustment MaintenanceGeneral Checking the inertia brake release Muffler Replacing the starter cord StarterTensioning the recoil spring Air filter Replacing the return and drive springsFitting the starter Recoil spring aSpark plug Lubricating the bar tip sprocketNeedle bearing lubrication Cooling systemTemperature -5C 23F or colder Air Injection centrifugal cleaningWinter use Maintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataBar and chain combinations Saw chain filing and file gaugesYour Warranty Rights and Obligations ´z+S=¶5Z¨ American Standard Safety Precautions Safety precautions for chain saw usersKickback safety precautions Other safety precautions1151082-95