Stihl MS 162 Instruction Manual - Page 23
Fan Cut, ing Method
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7 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling English wood or plastic and never steel, which can damage the chain. ■ Whichever felling method you select, never cut through the hinge when making your felling back cut. The hinge helps control the fall of the tree. Cutting through the hinge will eliminate the feller's ability to control the tree's fall and may result in serious or fatal personal injury or property damage. ■ 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 (barberchairing), 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, release the trigger switch, engage the chain brake and walk away briskly on the pre-plan‐ ned escape path. ■ Watch out for limbs falling from the felled tree. ■ Be extremely careful with partially fallen trees. When the tree hangs or for some other reason does not fall completely, set the saw aside and pull the tree to the ground with a cable winch, block and tackle or tractor. Trying to cut it down with your saw is extremely dangerous and may result in serious or fatal injury. Trees of this nature can fall suddenly and often are under tension. The tree is brought down with the felling back cut (D). of the saw, wedges can be used to re-position it. 7.5.7 Fan Cut Use the simple fan cut for making the felling back cut on trees with a diameter less than the effec‐ tive cutting length of the guide bar. ► After creating the felling notch, engage the bumper spikes of the chain saw directly behind the location of the intended hinge and 1 to 2 in. (2.5 to 5 cm) higher than the bottom of the felling notch. Pivot the saw around this point only as far as the back of the hinge. Do not cut through the hinge. The bumper spike should roll against the trunk until the back cut is complete. 7.5.8 Sectioning Method WARNING ■ This method is extremely dangerous because it involves the use of the nose of the guide bar and can result in kickback. If you are inexper‐ ienced with a chain saw, plunge-cutting should not be attempted. Seek the help of a profes‐ sional. 0000-GXX-1441-A1 D Use the sectioning method for making the felling D back cut on trees with a diameter more than the effective cutting length of the guide bar. 0000-GXX-1440-A1 0000-GXX-1442-A0 For both conventional and open-faced notches: ► Begin 1 to 2 in. (2.5 to 5 cm) higher than the 1 bottom of the felling notch. ► Cut horizontally toward the felling notch. ► Leave approximately 1/10 of the diameter of the tree uncut. This is the hinge (E) that will help control the fall of the tree. ► Do not cut through the hinge because you could lose control of the direction of the fall. ► If necessary, wedges can be driven into the felling back cut to keep the cut open and to help control the direction of the fall. For exam‐ ple, if a tree tends to "sit back," causing a bind 0458-200-8621-A 3 2 4 23