valutazioni - 1, GPA: 4 ( )

Produttore : McCulloch File Size : 950.21 kb File Nome : Lingua di insegnamento:

Before each use Control that the chain oil pump functions correctly: direct the bar towards a clear surface at a distance of about 20 centimetres; after the machine has run for about a minute, the surface should show clear traces of oil(fig.1). Check that excessive strength is not needed for activating and deactivating the chain brake. Also check that it is not activated too easily and that it is not blocked. Then check chain brake function as follows: release the chain brake, grip the machine correctly and start up the machine, activate the chain brake by pushing the front hand guard forward with the left wrist or arm but without removing the hand from the handle(fig.2). If the chain brake is working correctly, the chain should be blocked immediately. ENGLISH – 7 Check that the chain is sharpened correctly (See below), in good working condition and that the tension is correct. If the chain is irregularly worn, or if the cutting teeth are only 3 mm high, the chain must be replaced(fig.3). Clean the air vents regularly to prevent motor overheating. Check that the switch and switch block function correctly (to be performed with the chain brake released): press the switch and the switch block and control that they return to idle position as soon as they are released; control that it is impossible to press the switch without activating the switch block. Check that the chain catcher and the right hand guard are in correct condition without any visible faults such as damaged material. Every 2-3 hours of use Control the bar condition, if necessary clean the lubrication holes(fig.4) and the guide grooves(fig.5) carefully; If the groove is worn or shows signs of deep notching, it must be replaced. Turn the bar to ensure even wear(fig.6). Clean the pinion regularly and check that it has not been subject to excess wear(fig.7). Lubricate the nose sprocket with bearing grease through the hole shown in the illustration (fig.8). Chain sharpening (When necessary) If the chain does not cut correctly, or requires hard bar pressure against the wood, and if the sawdust is very fine, this is a sign that it is not sharpened correctly. If the cutting action produces no sawdust, this means the cutting edge has been worn completely and the chain is pulverising the wood during cutting. A well-sharpened chain crosses through the wood without effort or pressure and produces large long wood shavings. The cutting side of the chain is composed of the cutting link (fig.9) with a cutting tooth(fig.10) and a cutting limit gauge(fig.11). The difference between these determines the cutting depth; a file guide and a 4mm diameter round file are needed to obtain good sharpening results; Follow the instructions below: Once the chain has been mounted and the tension is correctly adjusted, and the chain brake is activated, position the file guide perpendicular to the bar as shown in the illustration(fig.12), filing the cutting teeth at the angle shown(fig.13), always working from the interior towards the exterior, lessening the pressure during the return stage (it is very important to follow the instructions perfectly: excessive or insufficient sharpening angles, or an incorrect file diameter will increase the risk of kickback.) To obtain higher precision on side angles, it is advisable to position the file so that it exceeds the upper cutter by about 0.5 mm. File all the teeth on one side first, then turn the machine over and repeat the operation. Make sure that after sharpening operations, all teeth are the same length and that the height of the depth gauge is 0.6 mm lower than the upper cutter: check the height using a proper template and file (with a flat fil...

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