Makita HR4003C Instruction Manual

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9 ENGLISHHammer drilling operation► Fig.19Set the change lever to the symbol.Position the bit at the desired location for the hole, thenpull the switch trigger.Do not force the tool. Light pressure gives best results.Keep the tool in position and prevent it from slippingaway from the hole.Do not apply more pressure when the hole becomesclogged with chips or particles. Instead, run the tool atan idle, then remove the bit partially from the hole. Byrepeating this several times, the hole will be cleaned outand you can continue drilling operation.CAUTION:• There is a tremendous and sudden twistingforce exerted on the tool/bit at the time of holebreak-through, when the hole becomes cloggedwith chips and particles, or when striking rein-forcing rods embedded in the concrete. Alwaysuse the side grip (auxiliary handle) and firmlyhold the tool by both side grip and switch handleduring operations, and maintain good balanceand safe footing. Failure to do so may resultin the loss of control of the tool and potentiallysevere injury.Blow-out bulb (optional accessory)► Fig.20: 1. Blow-out bulbAfter drilling the hole, use the blow-out bulb to clean thedust out of the hole.Chipping/Scaling/Demolition► Fig.21Set the change lever to the or symbol.Hold the tool firmly with both hands. Turn the tool onand apply slight pressure on the tool so that the tooldoes not bounce around, uncontrolled. Pressing veryhard on the tool will not increase the efficiency.MAINTENANCECAUTION:• Always be sure that the tool is switched off andunplugged before attempting to perform inspec-tion or maintenance.• Never use gasoline, benzine, thinner, alcoholor the like. Discoloration, deformation or cracksmay result.LubricationCAUTION:• This servicing should be performed by MakitaAuthorized Service Centers only.This tool requires no hourly or daily lubrication becauseit has a grease-packed lubrication system. It should berelubricated regularly. Send the complete tool to MakitaAuthorized or Factory Service Center for this lubricationservice.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should be per-formed by Makita Authorized Service Centers, alwaysusing Makita replacement parts.OPTIONALACCESSORIESCAUTION:• These accessories or attachments are recom-mended for use with your Makita tool specifiedin this manual. The use of any other accessoriesor attachments might present a risk of injury topersons. Only use accessory or attachment forits stated purpose.If you need any assistance for more details regard-ing these accessories, ask your local Makita ServiceCenter.• SDS-MAX Carbide-tipped bits• SDS-MAX bull point• SDS-MAX cold chisel• SDS-MAX scaling chisel• SDS-MAX clay spade• Hammer grease• Bit grease• Side handle• Side grip• Depth gauge• Blow-out bulb• Safety goggles• Carrying case• Dust extractor attachmentNOTE:• Some items in the list may be included in thetool package as standard accessories. Theymay differ from country to country.

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