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Resumen del manual
50-degree angle to a depth of app.1/5 to 1/4 of the trunk diameter • ••••Make second cut from below at app. 40 degree angle • ••••Remove resulting 90-degree piece 001BA043 LA 001BA044 LA 001BA045 LA Making sapwood cuts • ••••For medium sized or larger trees make cuts at both sides of the trunk, • ••••at same height as subsequent felling cut. • ••••Cut to no more than width of guide bar. This is especially important in soft wood in summer -it helps prevent sapwood splintering when the tree falls. B = Felling cut Conventional and open-face technique: • ••••Begin 1 to 2 inches higher than center of felling notch • ••••Cut horizontalIy towards the felling notch • ••••Leave approx.1/10 of diameter uncut. This is the hinge • ••••Do not cut through the hinge – you could lose control of the direction of the fall Drive wedges into the felling cut where necessary to control the fall. !Warning! If the tip of the bar contacts a wedge, it may cause kickback. Wedges should be of wood or plastic – never steel, which can damage the chain. C = Hinge • ••••Helps control the falling tree • ••••Do not cut through the hinge you could lose control of the direction of the fall !Warning! In order to reduce the risk of personal injury, never stand directly behind the tree when it is about to fall, since part of the trunk may split and come back towards the operator (barber-chairing), or the tree may jump backwards off the stump. Always keep to the side of the falling tree. When the tree starts to fall, withdraw the bar, shut off the engine and walk away on the preplanned escape path. Watch out for falling limbs. 001BA048 LA001BA047 LA 001BA046 LA 001BA048 LA001BA047 LA 001BA046 LA !Warning! Be extremely careful with partially fallen trees which are poorly supported. When the tree hangs or for some other reason does not fall completely, set the saw aside and pull the tree down with a cable winch, block and tackle or tractor. If you try to cut it down with your saw, you may be injured. Felling cut for small diameter trees: simple fan cut Engage the bumper spikes of the chain- saw directly behind the location of the intended hinge and pivot the saw around this point only as far as the hinge. The bumper spike rolls against the trunk. Felling cut for large diameter trees: !Warning! Felling a tree that has a diameter greater than the length of the guide bar requires use of either the sectioning felling cut or plunge-cut method. These methods are extremely dangerous because they involve the use of the nose of the guide bar and can result in kickback. Only properly trained professionals should attempt these techniques. Sectioning method For the sectioning method make the first part of the felling cut with the guide bar fanning in toward the hinge. Then, using the bumper spike as a pivot, reposition the saw for the next cut. Avoid repositioning the saw more than necessary. When repositioning for the next cut, keep the guide bar fully engaged in the kerf to keep the felling cut straight. If the saw begins to pinch, insert a wedge to open the cut. On the last cut, do not cut the hinge. Plunge-cut method Timber having a diameter more than twice the length of the guide bar requires the use of the plunge-cut method before making the felling cut. 001BA089 LA First, cut a large, wide felling notch. Make a plunge cut in the center of the notch. The plunge cut is made with the guide bar nose. Begin the plunge cut by applying the lower portion of the guide bar nose to the tree at an angle. Cut until the depth of the kerf is about the same as the width of the guide bar. Next, align the saw in the direction in which the recess is to be cut. With the saw at full throttle, insert the guide bar in the trunk. If you are inexperienced with a chainsaw, plunge-cutting should not be attempted. Seek the help of a professional. Limbing Limbing is removing the branches from a fallen tree. !Warning! There is an extreme danger of kickback 001BA033 LA Bucking Bucking is cutting a log into sections. !Warnings! during the limbing operation. Do not work with the nose of the bar. Be extremely cautious and avoid contacting the log or other limbs with the nose of the guide bar. Do not stand on a log while limbing it – you may slip or the log may roll. Start limbing by leaving the lower limbs to support the log off the ground. When underbucking freely hanging limbs, a pinch may result or the limb may fall, causing loss of control. If a pinch occurs, stop the engine and remove the saw, 1. When bucking, do not stand on the by lifting the limb. log. Make sure the log will not roll downhill. If on a slope, stand on the Enlarge the plunge cut as shown in illustration. !Warning! uphill side of the log. Be extremely cautious when cutting Watch out for rolling logs. !Warning! There is an extreme danger of kickback limbs or logs under tension (spring poles). The limbs or logs could spring back at this point. Extra caution must be taken toward the operator and cause loss of to maint...