Makita EK7301 Owners Manual - Page 7
Cutoff discs - concrete saw
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Cutoff discs - The protection hood must always be on! Change discs only with the engine off! - There are two basic types of cutoff discs: - For metal (hot cutting) - For masonry (cold cutting) WARNING! Never use carbide tipped, circular saw blades or any kind of wood cutting blades. Never cut any type of wood. Reactive forces can cause severe personal injury from blade contact or thrown tips. NOTE: When using diamond cutoff discs, always make sure to observe the "direction of rotation" markings. Diamond discs should only be used for cutting masonry/brick/ concrete etc. - Cutoff discs are intended only for radial loading, i.e. for cutting. Do not grind with the sides of the cutting disc! This will break the disc (10)! Caution! Never change direction (turning radius less than 5 meters (16 feet), exert lateral (sideways) pressure, or tip the Power Cut dur- ing cutting (11)! - Use a cutting disc only for cutting the materials it is intended for. The proper type of disc must be used, for either metals or masonry. - The arbor hole of the cutting disc must be an exact fit with the arbor or shaft. If the arbor hole is larger, it must be fitted with an adapter ring (available as an accessory). - The cutting disc must be rated for freehand cutting at up to 3850 rpm or 80 m/sec for 400 mm discs, 4370 rpm or 80 m/sec for 350 mm discs, or up to 5100 rpm or 80 m/s for 300 mm discs. Use only cutting discs that comply with EN 12413, EN 13236. - The disc must be free of defects (12). Do not use defective cutting discs. Always tighten the cutting disc mounting bolt to a torque of 30 Nm. Otherwise, the cutting disc can twist. - Before starting the cutting disc, make sure you have a steady foot- ing. - Put the Power Cut into operation only as described in this operator's manual (13). Always place your left foot in the rear handle and grasp the other handle firmly (with thumb and fingers). Other starting methods are not allowed. - When starting the Power Cut it must be well supported and securely held. The cutting disc must not be touching anything. - If the cutting disc is new, test it by running it at least 60 seconds at top speed. When doing this, make sure that no persons or body parts are in the extended swing range of the disc, in case it is defective and flies apart. - When working with the Power Cut always hold it with both hands. Take the back handle with the right hand and the tubular handle with the left hand. Hold the handles tightly with your thumbs facing your fingers. - CAUTION: When you release the throttle lever the disc will keep spinning for a short period of time (free‑wheeling effect). - Continuously ensure that you have a safe footing. - Hold the Power Cut such that you will not breathe in the exhaust gas. Do not work in closed rooms or in deep holes or ditches (danger of poisoning by fumes). - WARNING - CARBON MONOXIDE PRODUCED DURING USE CAN KILL - DO NOT USE POWER CUTTER INDOORS - MAKE SURE THERE IS PROPER VENTILATION WHEN USING POWER CUTTER IN TRENCHES OR OTHER CONFINED SPACES. - Switch off the Power Cut immediately if you observe any changes in its operating behavior. - Switch off the engine before inspecting the V-belt tension or tightening it, replacing the cutting wheel, repositioning the cutter attachment (side or middle position) or eliminating faults (14). - Turn off the engine immediately and check the disc if you hear or feel any change in cutting behaviour. - Turn off the Power Cut when taking a break or stopping work (14). Place the unit in such a way that the disc is not touching anything and cannot endanger anyone. - Do not put the overheated Power Cut in dry grass or on any inflam- mable objects. The muffler is very hot (danger of fire). - IMPORTANT: After wet cutting, first turn off the water feed and then let the disc run at least 30 seconds, to fling off the remaining water and prevent corrosion. 10 min. 5 m 11 12 13 14 ● Maintenance ● Refuelling ● Changing cutoff discs ● Repositioning the cutting attachment ● Stopping work ● Transport ● Putting out of function