Husqvarna 435 Felling direction, Clearing the trunk and preparing your retreat, Directional cuts

Page 27

WORKING TECHNIQUES

Felling direction

The aim is to fell the tree in a position where you can limb and cross-cut the log as easily as possible. You want it to fall in a location where you can stand and move about safely.

Once you have decided which way you want the tree to fall you must judge which way the tree would fall naturally.

Several factors affect this:

Lean of the tree

Bend

Wind direction

Arrangement of branches

Weight of snow

Obstacles within the reach of the tree: for example, other trees, power lines, roads and buildings.

Look for signs of damage and rot in the stem, this makes it more probably that the tree will break and start to fall before you expect it to.

Clearing the trunk and preparing your retreat

Delimb the stem up to shoulder height. It is safer to work from the top down and to have the tree between you and the saw.

Remove any undergrowth from the base of the tree and check the area for obstacles (stones, branches, holes, etc.) so that you have a clear path of retreat when the tree starts to fall. Your path of retreat should be roughly 135 degrees away from the intended felling direction.

You may find you are forced to let the tree fall in its natural direction because it is impossible or dangerous to try to make it fall in the direction you first intended.

Another very important factor, which does not affect the felling direction but does affect your safety, is to make sure the tree has no damaged or dead branches that might break off and hit you during felling.

The main point to avoid is letting the tree fall onto another tree. It is very dangerous to remove a trapped tree and there is high accident risk. See instructions under the heading Freeing a tree that has fallen badly.

IMPORTANT! During critical felling operations, hearing protectors should be lifted immediately when sawing is completed so that sounds and warning signals can be heard.

D

 

 

 

 

 

 

 

 

 

 

 

a

 

o

 

 

 

 

 

 

direction

n

 

 

 

 

 

 

 

g

 

 

 

 

 

 

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

r

 

 

 

 

 

 

 

 

 

 

 

z

n

 

Felling

 

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retreat path

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

zone

path

a

 

e

 

 

 

 

n

z

 

Danger

 

 

 

 

 

g

r

 

 

 

 

 

 

 

 

 

o

 

 

 

 

 

 

 

 

 

 

 

n

 

 

 

 

 

Retreat

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

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.

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

English 27

Image 27 Contents
435 435e 440e You will find the following labels on your chain saw KEY to SymbolsSymbols on the machine Symbols in the operator’s manualContents Dear customer IntroductionWhat is what on the chain saw? What is WHAT?Before using a new chain saw General Safety PrecautionsChain brake and front hand guard Machine′s safety equipmentAlways use common sense Personal protective equipmentGeneral Safety Precautions Chain catcher Throttle lockoutMuffler Stop switchRight hand guard Vibration damping systemBar Cutting equipmentGeneral rules Cutting equipment designed to reduce kickbackGeneral information on sharpening cutting teeth Sharpening your chain and adjusting depth gauge settingToo large General advice on adjusting depth gauge settingIncreased if the depth gauge setting is Adjustment of depth gauge setting435e, 440e Tensioning the chainBar and cause serious or even fatal injury 435Lubricating cutting equipment Filling with chain oilChecking chain lubrication Chain drive sprocket Needle bearing lubricationChecking wear on cutting equipment 435e, 440e AssemblyFitting the bar and chain 435115 10 82-95 Rev.2 Fuel Fuel HandlingLong-term storage Fuel safetyFueling Transport and storageStarting and Stopping Starting and stoppingStarting Stopping General working instructions Basic safety rules Working Techniques Before useGeneral rules Terms Basic cutting techniqueSafe distance Tree felling techniqueLimbing Log is supported at one end. There is a high riskFelling direction Clearing the trunk and preparing your retreatDirectional cuts Felling cut How to avoid kickback What is kickback?Freeing a tree that has fallen badly Cutting the trunk into logs Maintenance Carburetor adjustmentGeneral Checking the inertia brake release Muffler Starter Replacing the starter cordTensioning the recoil spring Recoil spring a Air filterReplacing the return and drive springs Fitting the starterCooling system Spark plugLubricating the bar tip sprocket Needle bearing lubricationAir Injection centrifugal cleaning Temperature -5C 23F or colderWinter use Daily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain filing and file gauges Bar and chain combinationsYour Warranty Rights and Obligations ´z+S=¶5Z¨ Other safety precautions American Standard Safety PrecautionsSafety precautions for chain saw users Kickback safety precautions1151082-95