Makita 6924N Instruction Manual

Also see for 6924N: Instruction manual Instruction manual Instruction manual Instruction manual Instruction manual

Contents

Makita 6924N Instruction Manual Manual pdf 6 page image

6FUNCTIONAL DESCRIPTIONCAUTION:• Always be sure that the tool is switched off andunplugged before adjusting or checking function on thetool.Switch action (Fig. 1)CAUTION:• Before plugging in the tool, always check to see thatthe switch trigger actuates properly and returns to the“OFF” position when released.To start the tool, simply pull the switch trigger. Release theswitch trigger to stop.ASSEMBLYCAUTION:• Always be sure that the tool is switched off andunplugged before carrying out any work on the tool.Removing the outer and inner sleevesCAUTION:• Be careful not to allow foreign matter to enter theinsides of the tool when removing or installing the outerand inner sleeves.The outer sleeve M24 and inner sleeve M24 are factory -installed. If you need other sizes for your work, replace thesleeves as follows.Loosen the two screws while holding the outer sleeve.The outer and inner sleeves will be pushed up by thesprings built into the tool. (Fig. 2)Press the pin down to remove the inner sleeve from theouter sleeve. Be careful not to drop the inner sleeve whenremoving it. Do not remove the inner sleeve spring, tip rodand tip rod spring from the tool. (Fig. 3 & Fig. 4)Installing the outer and inner sleevesHold the inner sleeve with the pin facing upward. Placethe outer sleeve over the inner sleeve. Press the pin toallow inserting the inner sleeve, then release the pin tosecure the inner sleeve. (Fig. 5)Insert the outer and inner sleeves into the tool whilerotating the inner sleeve alternately clockwise andcounterclockwise until there is no gap between the outersleeve and the tool. See the figure. Then tighten the twoscrews securely. (Fig. 6)OPERATIONBolt installationSlip the tool onto the bolt so that the inner sleevecompletely covers the bolt tip. (Fig. 7)CAUTION:• Be careful when fitting the sleeve onto the bolt tip.Striking the tip can damage it so that it will no longer fitinside the sleeve properly.• First tighten bolts preliminarily by using a hand wrenchand then tighten them with this tool. Use this tool onlyafter preliminary tightening without starting thetightening with this tool.Keep forward pressure on the tool while sliding it furtherforward until the outer sleeve fits completely over the nut.If the tool fails to fit completely over the nut, twist the toolslightly right and left while pushing forward. (Fig. 8)Pull the switch trigger. The outer sleeve turns to begintightening the nut.When the specified torque is attained, the bolt tip will besheared at its notched portion. The bolt tip will remaininside the inner sleeve. (Fig. 9)Release the switch trigger and withdraw the tool in astraight line. (Fig. 10)CAUTION:• Do not force the tool down excessively. Apply thedownward force to the degree just needed to hold thetool firm.Pull the tip ejector (tip lever) to eject the bolt tip from thetool. Catch the sheared bolt tips to prevent them fromfalling dangerously below. Keep the tips off of the ground,floor, walkways, etc. to prevent injury from tripping orfalling. (Fig. 11 & Fig. 12)CAUTION:• Washer and nut have head and tail. Head hasidentification mark for nut and chamfer for washer.When placing them, be careful not to place in reverse.(Fig. 13)CAUTION:• Replace nut, bolt and washer all together at one timewhen these rotate together, nut rotates excessively or abolt protrude from nut surface too much or less.• Do not reuse used nut, bolt and washer.• Choose shear bolts according to the thickness ofworkpiece to be fastened. Range for the remaininglength of bolts that are obtained after cutting off chipsare determined by bolt size. Refer to the table below fordetails.007540CAUTION:• Use bolts with the remaining length within the rangeshown in the table above as bolts with different sizehave different maximum and minimum remaininglength. Be careful not to use bolts beyond the specifiedrange which causes the tool damage. (Fig. 14)MAINTENANCECAUTION:• Always be sure that the tool is switched off andunplugged before attempting to perform inspection ormaintenance.• Never use gasoline, benzine, thinner, alcohol or thelike. Discoloration, deformation or cracks may result.Replacing carbon brushesRemove and check the carbon brushes regularly. Replacewhen they wear down to the limit mark. Keep the carbonbrushes clean and free to slip in the holders. Both carbonBolt size Maximumremaining lengthMinimumremaining lengthM22 26 mm 7 mmM24 23 mm 10 mm