Stihl 009 Instruction Manual - Page 19
²°²3xoo¿lqµ, 7r²dyrlg²sxoo¿lq, ²°²3xvkedfnµ, 7r²dyrlg²sxvkedfn, &xwwlqj²7hfkqltxhv, Hoolqj
View all Stihl 009 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 19 highlights
Felling is cutting down a tree. 001BA037 LÄ 001BA038 LÄ Before felling a tree, consider carefully all conditions which may affect the direction of fall, including: The intended direction of the fall. Pull-in occurs when the chain on the bottom of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain pulls the saw forward and may cause the operator to lose control. Pull-in frequently occurs when the bumper spike of the saw is not held securely against the tree or limb and when the chain is not rotating at full speed before it contacts the wood. Use extreme caution when cutting small size brush and saplings which may easily catch the chain and pull you off balance. 1. Always start a cut with the chain rotating at full speed and the bumper spike in contact with the wood. 2. Pull-in may also be prevented by using wedges to open the kerf or cut. Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain drives the saw straight back toward the operator and may cause loss of saw control. Pushback frequently occurs when the top of the bar is used for cutting. 1. Be alert to forces or situations that may cause material to pinch the top of the chain. 2. Do not cut more than one log at a time. 3. Do not twist the saw when withdrawing the bar from a plunge cut or underbuck cut because the chain can pinch. The natural lean of the tree. Any unusually heavy limb structure. Surrounding trees and obstacles. The wind direction and speed. Always observe the general condition of the tree. Inexperienced users should never attempt to cut trees which are decayed or rotted inside or which are leaning or otherwise under tension. There is an increased risk that such trees could snap or split while being cut and cause serious or fatal injury to the operator or bystanders. Also look for broken or dead branches which could vibrate loose and fall on the operator. When felling on a slope, the operator should stand on the uphill side if possible.