Ryobi Outdoor P540 manual Bucking, See Figures 18, Notch Back CUT Hinge Wedge Kickback

Page 17

OPERATION

nFelling Backcut. The backcut is always made level and horizontal, and at a minimum of 2 inches (5 cm) above the horizontal cut of the notch. See Figures 15 - 16.

nNever cut through to the notch. Always leave a band of wood between the notch and backcut (approximately 2 inches (5 cm) or 1/10 the diameter of the tree). This is called "hinge" or “hingewood.” It controls the fall of the tree and prevents slipping or twisting or shoot-back of the tree off the stump. See Figures 15 - 16.

nOn large diameter trees, stop the back cut before it is deep enough for the tree to either fall or settle back on the stump. Then insert soft wooden or plastic wedges into the cut so they do not touch the chain. The wedges can be driven in, little by little, to help jack the tree over.

See Figure 17.

NOTE: When bucking or felling with a wedge, it may be necessary to remove the SAFE-T-TIP®anti-kickback device to allow the bar to be drawn through the cut. After the cut is complete, the tip should be reinstalled immediately.

nAs tree starts to fall, stop the chain saw and put it down immediately. Retreat along the cleared path, but watch the action in case something falls your way. Be alert for overhead limbs or branches that may fall and watch your footing.

WARNING:

Never cut through to the notch when making a backcut. The hinge controls the fall of the tree, this is the section of wood between the notch and backcut.

BUCKING

See Figures 18 - 21.

Bucking is the term used for cutting a fallen tree to the de- sired log length.

nAlways make sure your footing is secure and your weight is distributed evenly on both feet.

nCut only one log at a time.

nSupport small logs on a saw horse or another log while bucking.

nKeep a clear cutting area. Make sure that no objects can contact the guide bar nose and chain during cutting, this can cause kickback. To avoid the danger, keep the SAFE-T-TIP®anti-kickback device attached while cutting. Refer to “Precautions Against Kickback” earlier in this manual.

nWhen bucking on a slope, always stand on the uphill side of the log. To maintain complete control of the chain saw when cutting through the log, release the cutting pressure near the end of the cut without relaxing your grip on the chain saw handles. Do not let the chain contact the ground. After completing the cut, wait for the saw chain to stop before you move the chain saw. Always stop the motor before moving from tree to tree.

nSometimes it is impossible to avoid pinching (with just standard cutting techniques) or difficult to predict which way a log will settle when cut. To avoid pinching while cutting, rotate or move the log so that the pinch is elimi- nated.

NOTCH

BACK CUT

HINGE

Fig. 16

WEDGE

Fig. 17

KICKBACK

Fig. 18

Fig. 19

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Contents Save this Manual for Future Reference Operators ManualIntroduction Table of ContentsSafety Apparel General Safety RulesRead ALL Instructions Basic Safety Precautions See Figures 1 KickbackCUTTING/WORK Area Understanding Your Chain SAW Safety DevicesLOW Kickback SAW Chain Guide BarsBattery Safety Safety Rules for ChargerCharger Safety ModelSymbol Name Explanation SymbolsSymbol Meaning Battery Pack Not Included HEX KEY Product SpecificationsScabbard BAR SAFE-T-TIP Chain Hand Guard Front HandleOperation AssemblyUnpacking Packing ListBattery Pack Charger Charging the Battery PackCharging a Cool Battery Pack To Install Battery Pack Charging a HOT Battery PackTo Remove Battery Pack Battery Port Pack LatchesSee Figures 10 Starting and Stopping the Chain SAWPreparation for Cutting Chain Line Work Area Precautions Basic Cutting ProcedureProper Cutting Stance Tree FellingRetreat Zone Planned Line of FallFall HingeNotch Back CUT Hinge Wedge Kickback BuckingSee Figures 18 See Figures 20 Bucking Logs Under StressTypes of Cutting Used Pruning LimbingSpringpoles SpringpoleGeneral Maintenance MaintenanceBattery Pack Removal Preparation for Recycling BatteriesSee Figures 25 Replacing BAR and ChainRecommended BAR and Chain Combinations Lift the TIP Guide BAR UP to Check for SAG HEX KEY Chain TensionSee Figures 30 HOW to Sharpen the Cutters Chain MaintenanceSee Figures 32 See Figures 34Depth Gauge Clearance TOP Plate Filing AngleSide Plate Angle Reversing the Guide BAR Guide BAR MaintenanceSee Figures 39 See Figures 41Mounting SAFE-T-TIPNOSE Guard SAFE-T-TIPNOSE Guard MaintenanceTransporting and Storing See Figures 42Problem Cause Solution TroubleshootingService Model NO. and Serial no

P540 specifications

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