The use of a brush cutter is limited to a few annual operations, these machines are likely to perform other operations, after adaptation of specialized tools: disc-saw for pruning, disc-mower, edger blade, tool to rotating wire. (Non-contractual photo, does not necessarily reflect the drawing)
A deflector stops cutting debris that could be thrown violently towards the operator. Each tool is delivered with a suitable deflector that must always be put in place during the work.
The deflector attaches to the end of the shaft, just behind the clamp of the gear reducer. It is held by a flange and two screws.
When plant debris gets caught between the tool and the deflector, you must first stop the motor. If you can not clear the tool, loosen the screws on the baffle flange and slide the baffle toward the back; put it back in place and tighten the flange before restarting the engine.
Preparation of the tool
The blade of the tool is mounted on a special hub terminated by a flange whose female splines engage on those of the output shaft of the gear reducer. The brushcutter blade is mounted with a support cup (slider bowl).
First remove the three bolts holding the support cup, through a large washer. Then remove the bolt (in the left-hand pitch), the bowl and the original flange of the tool. Place the flange delivered with the cup on the underside of the blade (opposite the face with inscriptions), then the washer.
Engage the bearing pin in its housing, and lock the flange using the pin wrench provided in the machine tool kit; lock the bearing axle in the drive shaft.
Place the bowl on the router, then the washer on the underside of the bowl and secure it with the three bolts. The bowl turns crazy on the bearing, which allows to work by leaving the bowl on the ground, without risk for the tool; you must, however, beware of stones that may damage it.
Assembly of the tool
Turn the machine over on its back, making sure the engine is resting on the candle shield. It is better to drain the gas beforehand. If this is not possible, you can leave the engine standing, loosen the flange holding the shaft in the gearbox inlet and turn it back half a turn. In any case, disconnect the spark plug wire as a safety precaution.
The upper surface of the tool-blade bears inscriptions; it is placed on the side of the reducer. The fluted drive head, which exits the reducer, has a pin for retaining the tool. Pull it outward. Pass the skew tool through its center hole, then push the pin back so that its central arch is well behind the fluted head. Engage the flange, which has two diametrically opposite cuts, by styling the hairpin.
Then place the bowl and the screw (in the left-hand step) in the thread of the tool-holder shaft. Secure the flange with the spanner, then tighten the fixing screw fully counter-clockwise.
Use the double key, on the other hand serving as a spark plug, or in the absence of a pipe wrench No. 13.
Sharpening the blade
The circular saw blade for pruning sharpens with a circular sawmill. Otherwise, you can use a file, as long as it allows to respect the tooth bottom fillet (from 1 mm to 1.5 mm radius). As with all file sharpenings, you must use a lime single sizeif not a third point (triangular file). Also be sure to add the teeth.
Sharpening of the brushcutter disc is done with a grinding wheel or a file. It is necessary to respect a fillet of connection of the advancing face of the tooth on the disc, as well as the fillet of the cutting face, which must always be set back with respect to the internal diameter of the disc: the sharpening of the tooth must stop at about 1 or 2 mm from the edge of the inner disk. Finish sharpening by "biting" the burrs of the sharp edge with a whetstone.
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