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EC DECLARATION OF CONFORMITY

Model Name: Gasoline Concrete cutter
Model Code: DACNQ740S
Brand: Daewoo

We GBR Corp. LTD, Room 1002, 10/F., David House, 8-20 Nanking Street, Jordan, Kowloon, Hong
Kong, China, declare under our sole responsibility that this product is in conformity and accordance
with the following standards and regulations.

The undersigned is responsible for the compilation of technical documentation.

Satisfies the requirement of the Council Directives:
Machinery Directive 2006/42/EC
Electromagnetic Compatibility Directive EMC 2014/30/EU
Noise Directive 2000/14/EC (Measured sound power level: 92.4dB (A),
Guaranteed sound power level: 116dB (A)

and conforms to the norms:
EN ISO 19432-1:2020
EN ISO 14982: 2009

Signature and Stamp on undersigned responsible.

Date: 5-9-2022

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Содержание DACNQ740S

Страница 1: ...Manufactured under license of Daewoo International Corporation Korea www daewoopowerproducts com USER S MANUAL DACNQ740S Concrete cutter ...

Страница 2: ...FETY EQUIPMENT 4 3 CUTTING BLADES 7 4 ASSEMBLING AND ADJUSTMENTS 13 5 FUEL HANDLING 16 6 OPERATING 19 7 STARTING AND STOPPING 8 MAINTENANCE 32 9 TROUBLESHOOTING 38 10 TECHNICAL DATA 39 11 EXPLODED VIEW AND PARTS LIST 40 WARRANTY 46 2 28 1 ...

Страница 3: ... product is in accordance with applicable EC directives WARNING Dust forms when cutting this can cause injuries if inhaled Use an approved breathing mask Avoid inhaling exhaust fumes Always provide for good ventilation WARNING Kickbacks can be sudden rapid and violent and can cause life threatening inju ries Read and understand the instructions in the manual before using the machine WARNING Sparks...

Страница 4: ...l data chapter and on the label Rating plate Row 1 Brand Model X Y Row 2 Serial No with manufacturing date Y W X Year Week Sequence No Row 3 Product No X Row 4 Manufacturer X Row 5 Manufacturer address Row 6 If applicable EC typ approval X Y Approval code Approval stage or Chinese MEIN number Other symbols decals on the machine refer to special certification requirements for certain markets Explan...

Страница 5: ...igger lock remains pressed in as long as the throttle is pressed When the grip on the handle is released the throttle trigger and the throttle trigger lock both return to their original positions This is controlled by two independent return spring systems This means that the throttle trigger is automa tically locked in the idle position Checking the throttle lockout Make sure that the throttle tri...

Страница 6: ...s when the throttle is in the idle position you should check the carburettor s idle adjustment See instructions in the section Maintenance Stop switch Use the stop switch to switch off the engine Checking the stop switch Start the engine and make sure the engine stops when you move the stop switch to the stop setting Blade guard This guard is fitted above the cutting blade and is designed to preve...

Страница 7: ... system that is designed to minimize vibration and make operation easier The machine s vibration damping system reduces the transfer of vibration between the engine unit cutting equipment and the machine s handle unit The engine body including the cutting equip ment is insulated from the handles by vibration damping units Checking the vibration damping system Check the vibration damping units regu...

Страница 8: ...The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user Inspecting the muffler Check regularly that the muffler is complete and secured correctly 3 CUTTING BLADES ...

Страница 9: ...ight bushing is used for the cutting blade to be fitted on the machine See the instructions under the heading Fitting the cutting blade Suitable cutting blades For more information see the Technical data section Without water See instructions under the heading Toothed blades carbide tipped blades and emergency situa tions Cutting blades for different materials Follow the instructions supplied with...

Страница 10: ...n this saw cutting blades are manufactured for highspeed portable power cutters Check that the blade is approved for the same or higher speed according to the aproval plate of the engine Never use a cutting blade with a lower speed rating than that of the power cutter CUTTING BLADES Blade vibration The blade can become out of round and vibrate if an excessive feed pressure is used A lower feed pre...

Страница 11: ...ed or damaged A cutting blade s performance is determined by the type and size of abrasive corn and the type and hardness of the bonding agent Ensure the cutting blade is not cracked or damaged Test the abrasive blade by hanging it on your finger and tapping it lightly with a screwdriver or the like If the blade does not produce a resonant ringing sound it is damaged Abrasive blades for different ...

Страница 12: ... become dull when the wrong feeding pressure is used or when cutting certain materials such as heavily reinforced concrete Working with a dull diamond blade causes overheating which can result in the diamond segments coming loose Sharpen the blade by cutting in a soft material such as sandstone or brick Diamond blades and cooling During culling the friction in the cut causes the diamond blade to b...

Страница 13: ...should NOT be used dry Using wet cutting blades without water can cause excessive heat build up resulting in poor performance severe blade damage and is a safety hazard Diamond hlade side clearance Water cools the blade and increases its service life while also reducing the formation of dust Toothed blades carbide tipped blades and emergency situations 12 ...

Страница 14: ...ciated with its use and then only in those exigent circumstances when other tools are deemed inefficient and ineffective to for fire or rescue operations A power cutter equipped with carbide tipped blade should never be used to cut wood in non rescue operations Transport and storage Do not store or transport the power cutter with the cutting blade fitted All blades should be remo ved from the cutt...

Страница 15: ...een factory fitted together with appropriate blade specification Check that the bushing on the machine s spindle shaft corresponds with the centre hole of the cutting blade The blades are marked with the diameter of the centre hole Checking the direction of the blade rotation When using diamond blades make sure that it rotates in the direction indicated by the arrow on the blade The direction of r...

Страница 16: ...vel restricted only by the thickness of the blade guard In the event of a kickback it is harder to control the machine when cutting with the cutting head reversed The cutting blade is further away for the centre of the machine which means the handle and the cutting blade are no longer in align ment It is more difficult to restrain the machine if the blade gets jammed or stuck in its kickback dange...

Страница 17: ...Use fans to ensure proper air circulation when working in trenches or ditches deeper than one meter Fuel and fuel fumes are flammable and can cause serious injury when inhaled or allowed to come in contact with the skin For this reason observe caution when handling fuel and make sure there is adequate ventilation The exhaust fumes from the engine are hot and may contain sparks which can start a fi...

Страница 18: ... Two stroke oil For best results and performance use twostroke engine oil which is specially formulated for our air cooled two stroke engines Never use two stroke oil intended for water cooled engines sometimes referred to as outboard oil rated TCW Never use oil intended for four stroke engines Mixing Always mix the petrol and oil in a clean container intended for fuel Always start by filling half...

Страница 19: ...ling WARNING Taking the following precautions will lessen the risk of fire Do not smoke and do not place any hot objects in the vicinity of fuel Always stop the engine and let it cool for a few minutes before refuelling The engine should be switched off and the stop switch in STOP position When refuelling open the fuel cap slowly so that any excess pressure is released gently Clean the area around...

Страница 20: ...e right equipment Always wear Approved protective helmet Hearing protection Approved eye protection If you use a face shield then you must also wear approved protective goggles Approved respiratory protection Heavy duty firm grip gloves Tight filling heavy duty and comfortable clothing that permits full freedom of movement Cutting generates sparks that can ignite clothing recommends that you wear ...

Страница 21: ...onceivable situation you can face Always exercise care and use your common sense If you get into a situation where you feel unsafe stop and seek expert advice Contact your dealer service agent or an experienced user Do not attempt any task that you feel unsure of CAUTION Sparks may appear and start a fire when you work with the machine Always keep fire fighting equipment handy WARNING The machine ...

Страница 22: ...onceivable situation you can face Always exercise care and use your common sense If you get into a situation where you feel unsafe stop and seek expert advice Contact your dealer service agent or an experienced user Do not attempt any task that you feel unsure of CAUTION Sparks may appear and start a fire when you work with the machine Always keep fire fighting equipment handy WARNING The machine ...

Страница 23: ...can affect your control of the machine Ensure that no one nothing can come into contact with the cutting equipment or be hit by parts thrown by the blade Do not use the machine in bad weather such as dense fog heavy rain strong wind intense cold etc Working in bad weather is tiring and can lead to dangerous conditions e g slippery surfaces Never start to work with the machine before the working ar...

Страница 24: ...left handed shall use this grip Never operate a power cutter holding it with only one hand Stand parallel to the cutting blade Avoid standing straight behind In the event of a kickback the saw will move in the plane of the cutting blade WARNING Do not pull the power cutter to one side this can cause the blade to jam or break resulting in injury to people Under all circumstances avoid grinding usin...

Страница 25: ...ser The guards for the culling equipment must always be fitted when the machi ne is running Never use the kickback zone of the blade for cutting See instructions under the heading Kick back Keep a good balance and a firm foothold Never cut above shoulder height Never cut from a ladder Use a platform or scaffold if the cut is above shoulder height Do not overreach Stand at a comfortable distance fr...

Страница 26: ...is connected to a water pressure that is too high See instructions under the Technical data heading for recommen ded water pressure Cutting with toothed carbide tipped blades during rescue operations If the public safety force fire department that purchased this power cutter has decided to equip this unit with a carbide tipped blade for rescue operations the following safety considerations must be...

Страница 27: ...til cutting is complete Low blade speed especially in hard and thin materials can result in jamming and the breaking off of the carbide tips Thin material Cutting thin and hard material i e a sheet metal covered roof should be conducted in a forward direction for best control Pinching or jamming Make a careful evaluation of how the object will move during the final stage of the cutting to avoid pi...

Страница 28: ...ttle danger However a kickback can also be very violent and throw the power cutter up and back towards the user in a rotating motion causing serious or even fatal injury Reactive force A reactive force is always present when cutting The force pulls the machine in the opposite direction to the blade rotation Most of the time this force is insignificant If the blade is pinched or stalled the reactiv...

Страница 29: ...to control the power cutter If the blade is pinched or stalled in the kickback zone the reactive force will push the power cutter up and back towards the user in a rotating motion causing serious or even fatal injury Be alert for potential movement of the work piece If the work piece is not properly supported and shifts as you cut it might pinch the blade and cause a kick back Pipe cutting Special...

Страница 30: ...g through When the cut opens there is no kickback If the cut closes and pinches the blade there is always a risk of kickback Take care when inserting the blade in an existing cut Be alert to movement of the work piece or anything else that can occur which could cause the cut to close and pinch the blade Transport and storage Secure the equipment during transportation in order to avoid transport da...

Страница 31: ...l injury Perform daily maintenance See instructions in the section Maintenance Starting With a cold engine Make sure that the stop switch STOP is in the left position Start throttle position and choke is obtained by pulling out the choke control completely Decompression valve Press in the valve to reduce the pressure in the cylinder this is to assist starting the power cutter The decompression val...

Страница 32: ...sition Decompression valve Press in the valve to reduce the pressure in the cylinder this is to assist starting the power cutter The decompression valve should always be used when starting The valve automatically returns to its initial position when the machine starts Push the choke control to disable the choke the start throttle position remains Grip the front handle with your left hand Put your ...

Страница 33: ...noxide is colorless and tasteless and is always present in exhaust fumes The onset of carbon monoxide poisoning is distinguished by a slight dizziness which may or may not be recognized by the victim A person may collapse and lapse into unconsciousness with no warning if the concentration of carbon monoxide is sufficiently high Since carbon monoxide is colorless and odorless its presence can not b...

Страница 34: ...hine daily by rinsing it with clean water after the work is finished Cooling air intake Clean the cooling air intake when needed WARNING The user must only carry out the maintenance and service work des cribed in this Operator s Manual More extensive work must be carried out by an authorized service workshop The engine should be switched off and the stop switch in STOP position Wear personal prote...

Страница 35: ...unctional inspection General inspection Check that nuts and screws are tight Drive belt Tensioning the drive belt The tension of a new drive belt must be readjusted after one or two tanks of fuel have been used When the machine is equipped with a friction retarder a scraping sound can be heard from the bearing housing when the blade is turned by hand This is quite normal Please contact he workshop...

Страница 36: ... position O to release the tension Remove the upper belt guard Now remove the rear belt guard Replace the drive belt Turn the belt tensioner B to position 1 to tighten the drive belt WARNING Never start the engine when the belt pulley and clutch are removed for maintenance Do not start the machine without the cutting arm or cutting head fitted Otherwise the clutch could come loose and cause person...

Страница 37: ...lp contact an authorised servi ce workshop Adjusting the idle speed Start the engine and check the idling setting When the carburettor is set correctly the cutting blade should be still while engine is idling Adjust the idle speed using the T screw When an adjustment is necessary first turn the screw clockwise until the blade starts to rotate Now turn the screw anti clockwise until the blade stops...

Страница 38: ...erating disturbances caused by blockage of the fuel filter located inside the tank The filter cannot be cleaned but must be replaced with a new filter when it is clogged The filter should be changed at least once per year Air filter The air filter only needs to be checked if the engine drops in power Loosen the screws Remove the air filter cover WARNING When the recoil spring is wound up in the st...

Страница 39: ...e with local requirements By ensuring that this product is taken care of correctly you can help to counteract the potential negative impact on the environment and people that can otherwise result through the incorrect waste management of this product For more detailed information about recycling this product contact your municipality your domestic waste service or the shop from where you purchased...

Страница 40: ... TROUBLESHOOTING Troubleshooting schedule WARNING If service operations or troubleshooting does not require the machine to be on the engine should be switched off and the stop switch in STOP position 38 ...

Страница 41: ...AL DATA DACNQ740S Engine Displacement 74cc Engine type 2 Stroke Power kW 3 5 kW 8000r min Max engine speed 9500r min Fuel tank capacity 1100ml Blade diameter 350mm Max cutting depth 125mm Bore diameter 25 4mm 39 ...

Страница 42: ...11 EXPLODED VIEW AND PARTS LIST 40 ...

Страница 43: ... 20 Oil return pipe 1 21 Throttle lever 1 22 Throttle lever cover 1 23 Balancer 1 24 Balancer seat 1 25 Hexagon socket head combination screw M5 25 7 26 Starter cover 1 27 Starter handle 1 28 Starter handle cover 1 29 Small coil spring 1 30 Small coil spring plastic cover 1 31 Start cord 950 1 32 Big sheave 1 33 Big coil spring 1 34 Sheave Cover 1 35 Big gasket 5 16 1 5 1 36 Cross pan head tapping...

Страница 44: ... Cylinder gasket 1 60 Hexagon socket head combination screw M5 35 2 61 Muffler 1 62 Muffler gasket 2 63 Muffler air guide pad 1 64 Cylinder 1 65 Hexagon socket head combination screw M5 30 4 66 Spark plug 1 67 Wind shield 1 68 Pressure reducing valve 1 69 Cylinder shock spring 2 70 Cylinder shock spring seat 1 71 Inlet pipe seat 1 72 Hexagon socket head screw M5 10 3 73 Negative pressure nozzle 4 ...

Страница 45: ...96 Clutch gasket 10 48 1 5 1 97 Clutch 1 98 Belt PJ880 1 99 Side cover 1 100 Protecting cover 1 101 Hex Flange Nut M8 3 102 Pipe connector 1 103 Pipe 8mm 2m 1 104 Tee joint 1 105 Trachea 8 120 2 106 Throttle valve 2 107 Hex nut 3 8 2 108 Upper cover 1 109 Air filter 1 110 Middle cover 1 111 Hexagon socket head combination screw M5 50 2 112 sealing strip 3 1 113 Air filter sponge 1 114 Top cover 1 ...

Страница 46: ... 4 132 Output shaft 1 133 Stud M8 55 3 134 Fixed plate 1 135 Closed bearing 6202 2 136 Dust cover 1 137 Socket head cap screws M4 8 3 138 Adjust the handle cover 1 139 Adjusting handle lower cover 1 140 Aluminum gasket 2 141 Wheel cover large rubber pad 1 142 Wheel cover 1 143 Wheel cover small rubber pad 1 144 Wheel cover connecting flange 1 145 Spacer 1 146 Large pressure plate 1 147 Cutting dis...

Страница 47: ...with the following standards and regulations The undersigned is responsible for the compilation of technical documentation Satisfies the requirement of the Council Directives Machinery Directive 2006 42 EC Electromagnetic Compatibility Directive EMC 2014 30 EU Noise Directive 2000 14 EC Measured sound power level 92 4dB A Guaranteed sound power level 116dB A and conforms to the norms EN ISO 19432 ...

Страница 48: ...or more nodes teaser on the surfaces of the cylinder and the piston or destruction of piston rings Also the warranty does not cover failure of the automatic voltage regulator due to incorrect operation Failure caused by clogging of the fuel and cooling systems Wearing parts carbon brushes belts rubber seals oil seals shock absorbers springs clutches spark plugs mufflers nozzles pulleys guide rolle...

Страница 49: ...www daewoopowerproducts com Manufactured under license of Daewoo International Corporation Korea ...

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