Makita DHP448 Instruction Manual
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9NOTE:• Make sure that the driver bit is inserted straight inthe screw head, or the screw and/or bit may bedamaged.• When driving wood screw, predrill a pilot hole 2/3the diameter of the screw. It makes driving easierand prevents splitting of the workpiece.• If the tool is operated continuously until the batterycartridge has discharged, allow the tool to rest for15 minutes before proceeding with a fresh battery.Drilling operationCAUTION:• Pressing excessively on the tool will not speed upthe drilling. In fact, this excessive pressure willonly serve to damage the tip of your bit, decreasethe tool performance and shorten the service lifeof the tool.• There is a tremendous force exerted on the tool/bitat the time of hole break through. Hold the toolfirmly and exert care when the bit begins to breakthrough the workpiece.• A stuck bit can be removed simply by setting thereversing switch to reverse rotation in order toback out. However, the tool may back out abruptlyif you do not hold it firmly.• Always secure small workpieces in a vise orsimilar hold-down device.• If the tool is operated continuously until the batterycartridge has discharged, allow the tool to rest for15 minutes before proceeding with a fresh battery.First, slide the action mode change lever so that itpoints to the marking. The adjusting ring can bealigned in any torque levels for this operation. Thenproceed as follows.Drilling in woodWhen drilling in wood, the best results are obtained withwood drills equipped with a guide screw. The guidescrew makes drilling easier by pulling the bit into theworkpiece.Drilling in metalTo prevent the bit from slipping when starting a hole,make an indentation with a center-punch and hammerat the point to be drilled. Place the point of the bit in theindentation and start drilling.Use a cutting lubricant when drilling metals. Theexceptions are iron and brass which should be drilleddry.MAINTENANCECAUTION:• Always be sure that the tool is switched off and thebattery cartridge is removed before attempting toperform inspection or maintenance.• Never use gasoline, benzine, thinner, alcohol or thelike. Discoloration, deformation or cracks may result.Replacing carbon brushesFig.17Replace when they wear down to the limit mark. Keepthe carbon brushes clean and free to slip in the holders.Both carbon brushes should be replaced at the sametime. Use only identical carbon brushes.Fig.18Use a screwdriver to remove two screws then removethe rear cover.Fig.19Raise the arm part of the spring and then place it in therecessed part of the housing with a slotted bitscrewdriver of slender shaft or the like.Fig.20Use pliers to remove the carbon brush caps of the carbonbrushes. Take out the worn carbon brushes, insert thenew ones and replace the carbon brush caps in reverse.Fig.21Make sure that the carbon brush caps have fit into theholes in brush holders securely.Reinstall the rear cover and tighten two screws securely.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized Service Centers,always using Makita replacement parts.OPTIONAL ACCESSORIESCAUTION:• These accessories or attachments arerecommended for use with your Makita toolspecified in this manual. The use of any otheraccessories or attachments might present a risk ofinjury to persons. Only use accessory orattachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Drill bits• Hammer drill bits• Screw bits• Blow-out bulb• Safety goggles• Makita genuine battery and charger• Grip assembly• Depth rod• Hook• Rubber pad assembly• Wool bonnet• Foam polishing pad• Battery protectorNOTE:• Some items in the list may be included in the toolpackage as standard accessories. They may differfrom country to country. |
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