Évaluations - 3, GPA: 4
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Facilité d'utilisation
To fell big trees with a diameter exceeding twice the bar length, start the notching cuts from one side and draw the saw through to the other side of the notch. Start the back cut on one side of the tree, pivoting the saw through to form the desired hinge on that side. Then remove the saw for the second cut. Insert the saw in the first cut, very carefully so as not to cause kickback. The final cut is made by drawing the saw forward in the cut to reach the hinge. CS-550P 18 3 m (10 feet) Retreat Retreat Direction of fall 45° 45° Not this way 19 CS-550P LIMBING Limbing a fallen tree is much the same as bucking. Never stand on the tree that you are limbing. When limbing, caution is the word. Be careful of the tip touching other limbs. Always use both hands. Don’t cut with the saw overhead or aligned vertically with your body. If the saw should kickback, you may not have enough control to prevent possible injury. BUCKING Bucking is the sawing of a log or fallen tree into smaller pieces. There are a few basic rules which apply to all bucking operations. Keep both hands on the handles at all times. Support logs if possible. When cutting on a slope or hillside, always stand uphill. Keep in mind that the wood is heavy and that it will bend and pinch the saw if improperly supported. The trunk will weaken at the point where you make the cut unless the tree is lying on perfectly flat ground or supported as shown. If you make the cut with the tree on the ground, don’t let the saw’s chain dig into the earth; it is harmful for the saw, and you stand a good chance of being struck by flying debris. To cut the trunk, use the bucking and two-cut sequence shown. The first cut should be no deeper than one-third the trunk diameter. DANGER • Kickback is generated when the rotation of the chain is arrested for some reason. The most dangerous effect of this action occurs when the nose of the bar contacts another object, the chain is momentarily stopped and all the energy of the engine throws the bar upwards and backwards towards the operator. • The chain saw industry and government agencies have attempted to prescribe various safety devices, but the best protection is to avoid kickback. • Comply with the safety precautions as listed in this Manual and Safety Manual. Uphill position Finish cut First cut Board or flat stones CS-550P 20 Chain brake function When the lever is pushed forward, chain brake instantly stops the chain. Chain brake unlock When the lever is fully pulled toward the operator, brake is unlocked. Kickback motion CHAIN BRAKE OPERATION • Set the lever in the unlocked position before starting to cut. • If the brake is tripped by kickback reaction, the chain will stop immediately. Release the throttle to avoid possible damage to the engine or clutch. • Do not attempt to operate the engine with the brake locked. TESTING THE BRAKE • Start the engine on a solid level surface and run at a fast idle until warm. • Hold the saw firmly by the handles and accelerate the engine to a fast idle. • Slowly operate the chain brake lever while holding the saw firmly on the ground. When the brake lever trips, the chain should stop. Immediately release the throttle trigger. WARNING If the chain does not stop immediately, return the saw to your authorized ECHO dealer for repair. NOTICE • For practice, while cutting a small tree, push the lever forward to lock the brake. • Confirm that the brake works properly before each use. • If the chain brake is clogged with wood chips, function of the brake may deteriorate. Always keep the device clean. • Do not increase engine revolution while the chain brake is locked. • Use the chain brake only in starting or in emergencies. • When using throttle latch at starting, keep the chain brake locked. And after starting the engine, unlock the brake immediately. IMPORTANT Do not allow the saw to tip forward in order to avoid damage to the chain. Kickback motion When the bar nose hits another tree, etc. Improper thrust cutting End of the guide bar may be placed at the height of about 40 cm (16 in.). 40 cm (16 in.) Rear handle should be gripped lightly with the right hand. End of the guide bar may be placed at the height of about 40 cm (16 in.). 40 cm (16 in.) Rear handle should be gripped lightly with the right hand. Warm weather position (push; closed) Cold weather position (pull; opend) Air cleaner cover Air shutter AUTOMATIC CHAIN BRAKE Kickback produced from the tip of the guide bar will trip the automatic chain brake. To make sure that the automatic chain brake operates properly, follow these steps: 1. Stop the engine. 2. Hold the saw with the guide bar approximately 40 cm (16 in.) above a wooden surface. Right hand should hold the rear handle, and left hand should hold the front handle. 3. Release the front handle and drop the end of the guide bar against the wooden surface. 4. The impact should lock the chain brake. IMPORTANT When checking the operation of the automatic chain brake, use a soft sur...