Makita AN923 Instruction Manual

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Makita AN923 Instruction Manual Manual pdf 7 page image

7exceed the maximum allowable pressure of thefastener driving tool. Set the air pressure initially tothe lower value of the recommended allowablepressure.• Do not attempt to keep the trigger contact elementdepressed with tape or wire. Death or serious injurymay occur.• Always check contact element as instructed in thismanual. Nails may be driven accidentally if thesafety mechanism is not working correctly.SAVE THESE INSTRUCTIONS.INSTALLATIONSelecting compressor(CFM)Compressor air output per minuteNailing frequency (times/min.)0123410 20 30 40 500.83Mpa(8.3bar)0.64Mpa(6.4bar)0.53Mpa(5.3bar)0.44Mpa(4.4bar)004293The air compressor must comply with the requirementsof EN60335-2-34.• Select a compressor that has ample pressure andair output to assure cost-efficient operation. Thegraph shows the relation between nailing frequency,applicable pressure and compressor air output.Thus, for example, if nailing takes place at a rate ofapproximately 40 times per minute at acompression of 0.59 MPa (5.9 bar), a compressorwith an air output over 3 CFM (ft3 /minute) isrequired. Pressure regulators must be used to limitair pressure to the rated pressure of the tool whereair supply pressure exceeds the tool's ratedpressure. Failure to do so may result in seriousinjury to tool operator or persons in the vicinity.Selecting air hoseFig.1• Use an air hose as large a diameter and as short aspossible to assure continuous, efficient nailingoperation. With an air pressure of 0.49 MPa (4.9bar), an air hose with an internal diameter of over8.5 mm (5/16") and a length of less than 20 m (6.6ft.) is recommended when the interval betweeneach nailing is 0.5 seconds. Air supply hoses shallhave a minimum working pressure rating of 1.03MPa (10.3 bar) or 150 percent of the maximumpressure produced in the system whichever ishigher.CAUTION:• Low air output of the compressor, or a long orsmaller diameter air hose in relation to the nailingfrequency may cause a decrease in the drivingcapability of the tool.LubricationFig.2To insure maximum performance, install an air set (oiler,regulator, air filter) as close as possible to the tool. Adjustthe oiler so that one drop of oil will be provided for every30 nails.When an air set is not used, oil the tool with pneumatictool oil by placing 2 (two) or 3 (three) drops into the airfitting. This should be done before and after use. Forproper lubrication, the tool must be fired a couple of timesafter pneumatic tool oil is introduced.Fig.3FUNCTIONAL DESCRIPTIONCAUTION:• Always lock the trigger and disconnect the hosebefore adjusting or checking function on the tool.Nose adapter (Accessory)CAUTION:• Always lock the trigger and disconnect the hosebefore installing or removing the nose adapter.When nailing workpieces with easily-marred surfaces,use the nose adapter.Attach the nose adapter to the contact arm.Fig.4Adjusting depth of nailingFig.5To adjust the depth of nailing, turn the adjuster. Thedepth of nailing is the deepest when the adjuster isturned fully in the A direction shown in the figure. It willbecome shallower as the adjuster is turned in the Bdirection. If nails cannot be driven deep enough evenwhen the adjuster is turned fully in the A direction,increase the air pressure. If nails are driven too deepeven when the adjuster is turned fully in the B direction,decrease the air pressure. Generally speaking, the toolservice life will be longer when the tool is used with alower air pressure and the adjuster set to a lower depth ofnail driving.CAUTION:• Always lock the trigger and disconnect the hosebefore adjusting the depth of nailing.