Poulan 1990-10 User Manual - Page 13

C. BUCKING Bucking is the term used for cutting a fallen tree to the desired log size. 1. IMPORTANT POINTS a.. Cut only one log at a time. b. Cut shattered wood very carefully. Sharp piecesofwood could be flungtoward the operator. c. Use a sawhorse to cut small logs. Never allow another person to hold the log while cutting and never hold the log with your leg or foot d. Donot cut in an areawhere logs,limbs,and roots are tangled such as in a blown down area. Drag the logs into a clear area before cutting by p 11.itigout exposed and cleared logs first. e. Make the first bucking cut 1/3 of the way through the log and finish with a 2/3 cut on the opposite side. As the logis beingcut, itwill tend to bend. The saw can become pinched or hung in the log if you make the first cut deeper than 1/3 of the diameter of the log. f. Give special attention to logs under strain to prevent the saw from pinching. Make the first cut on the pressure side to relieve the stress on the log. Figure 21.. 2. TYPES OF CUTTING USED (Figure 22): Overcutting - begin on the top side of the log with the bottom of the saw against the log; exert light pressure downward. -- Undercutting- begin on the under side of the log with the top of the saw against the log-, exert light pressure upward. During undercutting, the saw will tend to push back at you. Be prepared for this reaction and hold the saw firmly to maintain control. A WARNING Never turn the saw upside down to undercut..The saw cannot be controlled in this position. A WARNING If saw becomes pinched or hung in a log, don't try to force it out. You can lose control of the saw resulting in injury and/or damage to the saw. Stop the saw, drive a wedge of plastic or wood into the cut until the saw can be removed easily. Figure 23 . Restart the saw and carefully reenter the cut. To avoid kickback and chain damage, do not use a metal wedge. Do not attempt to restart your saw when it is pinched or hung in a log. 3. BUCKING WITHOUT A SUPPORT a. Overcut with a 1/3 diameter cut. b. Roll log over and finish with an overcut. 1st Cut Pressure Side ...mgr. .11-- 2 nd Cut 2nd Cut • Overcut Figure 22 Undercut Wedge Used To Hold Cut Open Figure 23 B 1st Cut - A -0- 2nd Cut 2nd Cut Using Another Log As A Support II. "MM. Figure 24 1St Cut FAek- B 2nd Cut 1st Cut e 2nd Cut 1st Cut 2nd Cut 1 StCut 1st Cut Pressure Side Figure 21 Figure 25 - 13 -