Makita DHR280 Instruction Manual

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16 ENGLISHNOTE: This function does not work if the accelerationdoes not reach the predetermined one when the toolis swung.NOTE: If the bit is swung at the predeterminedacceleration during chipping, scaling, or demolishing,the motor is forcibly stopped. In this case, releasethe switch trigger, and then pull the switch trigger torestart the tool.ASSEMBLYCAUTION: Always be sure that the tool isswitched off and the battery cartridge is removedbefore carrying out any work on the tool.Side grip (auxiliary handle)CAUTION: Always use the side grip to ensuresafe operation.CAUTION: After installing or adjusting theside grip, make sure that the side grip is firmlysecured.To install the side grip, follow the steps below.1. Loosen the thumb screw on the side grip.► Fig.16: 1. Thumb screw2. Attach the side grip while pressing the thumbscrew so that the grooves on the grip fit in the protru-sions on the tool barrel.► Fig.17: 1. Thumb screw3. Tighten the thumb screw to secure the grip. Thegrip can be fixed at desired angle.GreaseCoat the shank end of the drill bit beforehand with asmall amount of grease (about 0.5 - 1 g).This chuck lubrication assures smooth action and lon-ger service life.Installing or removing drill bitClean the shank end of the drill bit and apply greasebefore installing the drill bit.► Fig.18: 1. Shank end 2. GreaseInsert the drill bit into the tool. Turn the drill bit and pushit in until it engages.After installing the drill bit, always make sure that thedrill bit is securely held in place by trying to pull it out.► Fig.19: 1. Drill bitTo remove the drill bit, pull the chuck cover down all theway and pull the drill bit out.► Fig.20: 1. Drill bit 2. Chuck coverChisel angle (when chipping,scaling or demolishing)The chisel can be secured at the desired angle. Tochange the chisel angle, rotate the action mode chang-ing knob to the O symbol. Turn the chisel to the desiredangle.► Fig.21: 1. Action mode changing knobRotate the action mode changing knob to the sym-bol. Then make sure that the chisel is securely held inplace by turning it slightly.Depth gaugeThe depth gauge is convenient for drilling holes ofuniform depth.Press and hold the lock button, and then insert thedepth gauge into the hex hole. Make sure that thetoothed side of the depth gauge faces the marking.► Fig.22: 1. Depth gauge 2. Lock button 3. Marking4. Toothed sideAdjust the depth gauge by moving it back and forthwhile pressing the lock button. After the adjustment,release the lock button to lock the depth gauge.NOTE: Make sure that the depth gauge does nottouch the main body of the tool when attaching it.Installing or removing the dustcollection systemOptional accessoryTo install the dust collection system, insert the tool intothe dust collection system all the way until it locks inplace with a little double click.► Fig.23To remove the dust collection system, pull the tool whilepressing the lock-off button.► Fig.24: 1. Lock-off buttonDust cupOptional accessoryUse the dust cup to prevent dust from falling over thetool and on yourself when performing overhead drillingoperations. Attach the dust cup to the bit as shown inthe figure. The size of bits which the dust cup can beattached to is as follows.Model Bit diameterDust cup 5 6 mm - 14.5 mmDust cup 9 12 mm - 16 mm► Fig.25: 1. Dust cupDust cup setOptional accessoryBefore installing the dust cup set, remove the bit fromthe tool if installed.Install the dust cup set on the tool so that the sym-bol on the dust cup is aligned with the groove in the tool.► Fig.26: 1. symbol 2. Groove