Assessments - 4, GPA: 3.8
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Facilidade de uso
cord (not included) to the Power Cord (52) of the Chain Saw. Make sure the electrical cord is away from the cutting area. Figure 4Note: Front Handle Guard not shown in illustration 4. Grasp the Handles with both hands. Always grip the handle with the thumb and fingers encircling the handle as show above. Push forward on the Lock-out Switch 5. (48), then squeeze and hold the Trigger Switch (49). NOTE: The Trigger Switch cannot be activated unless the Lock-out Switch is depressed. With the Chain Saw running, you may release pressure on the Lock-out Switch. Releasing the Trigger Switch will stop the motor. DANGER! To prevent serious injury and death from kickback: Do not touch the Guide Bar Nose to the wood. When the Chain Saw reaches full 6. speed, begin cutting with a light, downward pressure against the bottom mid-section of the Saw Chain (72). Allow the Saw Chain to cut at its own rate. Applying too much pressure can damage the tool. DANGER! When cutting loose, round, wood stock, make sure to place the wood stock on a sawhorse, in a cradle or use a timberjack (all sold separately) to avoid grabbing and throw back. When the Saw is cooled completely, 7. cover the Chain Guide Bar (71) with the Guide Bar Sheath (73). To prevent accidents, turn off the 8. tool and disconnect its power supply after use. Clean, then store the tool indoors out of children’s reach. Basic Felling, Limbing, and Bucking Cut Techniques Felling When 1. felling a tree, make sure the tree is not felled in a manner that would endanger any person, strike any utility line, or cause any property damage. Before felling is started, consider the natural lean of the tree, the location of larger branches, and the wind direction, to judge which way the tree will fall. The Chain Saw operator should keep on the uphill side of the terrain, as the tree will likely roll or slide downhill after it is felled. 2. Figure 5A retreat path should be planned and cleared as necessary before cuts are started. The retreat path should extend back and diagonally to the rear of the expected line of fall. Remove dirt, stones, loose bark, 3. nails, staples, wire, and other foreign objects from the tree where the cuts are to be made. Figure 6 4. When making a notching undercut, make the notch 1/3 the diameter of the tree, perpendicular to the direction of the fall. Make the lower horizontal notching cut first. This will help to avoid pinching of either the Saw Chain or the Chain Guide Bar when the second notch is being made. When making a 5. felling back cut, make the felling back cut at least 2 inches higher than the horizontal notching cut. Keep the felling back cut parallel to the horizontal notching cut. Make the felling back cut so that enough wood is left to act as a hinge. The hinge wood keeps the tree from twisting and falling in the wrong direction. Do not cut through the hinge. As the felling cut gets close to the 6. hinge the tree should begin to fall. If there is any chance that the tree may not fall in the desired direction, or it may rock back and bind the Saw Chain (72), stop cutting before the felling back cut is complete and use wedges of wood, plastic, or aluminum to open the cut and drop the tree along the desired line of fall. When the tree begins to fall, remove 7. the Chain Saw from the cut. Turn off the Chain Saw and put it down. Then, use the retreat path planned. Be alert for overhead limbs falling, and watch your footing. Limbing Figure 7 8. When limbing (trimming) branches from a fallen tree, leave the larger, lower limbs to support the log off the ground. Remove the small limbs in one cut. Branches under tension should be cut from the bottom up to avoid binding the Saw Chain. Bucking Bucking9. a log is cutting a log into lengths. It is important to make sure your footing is firm and your weight is evenly distributed on both feet. When possible, the log should be raised and supported by the use of limbs, logs, chocks or a timberjack. Figure 8 10. To Overbuck is when the log is supported along its entire length and is cut from the top. Allow the Saw to pull forward into the top of the log until the Spiked Bumper contacts on the log. Then pivot the saw through the log. Figure 92ND CUT OVERBUCK (2/3 DIAMETER) TO MEET 1ST CUT (TO AVOID PINCHING) 1ST CUT UNDERBUCK (1/3 DIAMETER) (TO AVOID SPLINTERING) 11. To Underbuck is when the log is supported on one end, and a cut 1/3 the diameter of the log is made from the underside of the log. Then, the finished cut is made by overbucking to meet the first cut. Figure 101st CUT OVERBUCK (1/3 DIAMETER) (TO AVOID SPLINTERING) 2nd CUT UNDERBUCK (2/3 DIAMETER) TO MEET 1ST CUT(TO AVOID PINCHING) 12. When the log is supported on both ends, cut 1/3 of the log’s diameter from the top overbuck. Then, make the finished cut by underbucking the lower 2/3 diameter of the log to meet the first cut. Figure 11STAND ON UPHILL SIDE WHEN CUTTING BECAUSE LOG MAY ROLL 13. When bucking on a slope, always stand on the uphill side ...