Makita DCS 341, DCS 401, DCS 400 Speed, Checking the safety chain brake, Adjusting the carburetor

Page 23

Checking the safety chain brake

6

M

Do not work with the saw without first checking the chain brake!

-Start the engine as described (make sure you have a good footing, and place the saw on the ground in such a way that the blade is free of contact).

-Grasp the tubular handle firmly with one hand and hold the grip with the other.

-With the engine running at moderate speed, press the hand guard (C/1) in the direction of the arrow with the back of your hand until the chain brake engages. The chain should stop immediately.

-Immediately release the throttle and release the chain

brake.

IMPORTANT: If the chain does not stop immediately when you test the chain brake, do NOT use the saw! Take the saw to a MAKITA service center.

Adjusting the carburetor

CAUTION:

Optimum perfornance can only be achieved if the carbure- tor is adjusted correctly. For this work, which should be carried out by an expert, the engine must be warmed up for a period of 3-5 min. and the air filter must be clean.

The carburetor has been adjusted by MAKITA on the basis of atmosheric pressure conditions at sea level. Other atmospher- ic pressure conditions or the running-in process of a new engine may require readjustment of the carburetor.

It is urgently recommended to use a revolution indicator (O/1) (order number 950 233 210) in order to achieve a correct adjustment of the carburetor. Adjust the carburetor using a 4 mm screwdriver.

The screwdriver shown (O/2) (order number 944 340 001) has a molded-on lug to assist in adjustment.

For adjusting the carburetor correctly the following steps must be carried out:

1. Warm up engine

2.

Switch off engine

STOP

3.

Basic adjustment

2

4.

Start engine

1

 

5. Set idle speed

6.Adjust speed

7.Check idling speed

8.Check acceleration

9.Check max. speed or output

10.Repeat adjustment procedure starting with step 5, until idling speed, max. speed and acceleration are reached with the adjustment made.

Checking the chain lubrication

N

Never work with the chain saw withoute sufficient chain lubrica- tion. Otherwise the service life of the chain and guide bar will be reduced.

Before starting work check the oil level in the tank and the oil feed. Check the oil feed rate as described below:

-Start the chain saw.

-Hold the running chain saw approx. 15 cm above a trunk or the ground (use an appropriate base).

If the lubrication is sufficient, you will see a light oil trace because oil will be flung off the sawing device.

3

21

O

speed

4

STOP

Basic adjustment (step 3)

-First, carefully turn the 2 adjusting screws for the main jet (O/3) and the idle jet (O/4) to the right (clockwise) until you feel them stop.

-Now turn both screws one turn to the left (counter-clockwise).

2

1

Set idle speed (step 5)

-If the chain turns when the engine is idling, unscrew the throttle-valve stop screw (O/speed) until the chain stops. If the engine runs unevenly, screw the screw (O/speed) back in.

-Idling speed should be 2,600 rpm.

Adjust speed (output) (step 6)

-Adjust the speed by adjusting the main jet screw (O/3) to 11,500 rpm (DCS 340, 341), 12,000 rpm (DCS 400, 401).

Check idle speed (item 7)

-After having adjusted the max. speed ensure the idle speed is set to 2,600 1rpm. (the chain must not turn). Use the idle jet screw (O/4) to regulate it. Turn in the screw (O/4) to speed up, and turn out the screw (O/4) to speed down the engine.

Check acceleration (item 8)

-Now check the acceleration, i. e. the time necessary for speeding up from idle speed to max. speed. To do this, press the throttle lever hard.

-If the acceleration is too low, turn out the idle jet screw (O/4) approx. 1/8 rotation.

Do not run the engine without load a high speed, open throttle fully only, if you are sawing!

23

Page 22 Page 24
Image 23
Page 22 Page 24
Contents Owner’s Safety Manual RE Y Makita DCS 340, DCS 341, DCS 400, DCS ContentsSee SymbolsDelivery inventory FurtherAdditional safety precautions Safety precautions for chain saw operators45M6 General Safety PrecautionsDiscription of symbols used on chain saws Ansi B175.1-1991Transporting the chain saw Proper clothingSaw Use of the sawFueling instructions Chain saw operating instructionsFeet FuelingCutting instructions Important adjustmentsWorking conditions Reactive forces during the cut, including kickback KickbackDepth gauges Saw chain cutter sharpnessTo avoid kickback Speed of contact at which the cutter contacts the objectTo avoid pull-in Cutting techniquesPushback To avoid pushback= cutting down area Felling instructionsSectioning Method Plunge-Cut MethodBucking LimbingMaintaining and storing the saw Maintenance and RepairDCS Denomination of components 13 12 Identification plate15 14 Length Technical data DCSApproved bar and chain combinations Mounting the guide bar and saw chain StopChecking the chain tension Tightening the saw chainChain oil Safety chain brakeFuel / Refuelling Fuel mixtureImportant note on bio-degradable chain oils Waste oilRefuelling Warm start Starting the engineStopping the engine Cold startChecking the chain lubrication Checking the safety chain brakeAdjusting the carburetor SpeedMin 65 mm 025Working in winter Sharpening the saw chainMulti-purpose grease Cleaning the guide bar, lubricating the sprocket noseFiles and how to work with them Protective gloves must be wornReplacing the saw chain Cleaning the brake band and sprocket interiorReplacing / cleaning the spark arrester screen Replacing the suction headReplacing the spark plug Cleaning the air filterMaintenance and repair Service, spare parts and guaranteeInstructions for daily and periodic maintenance Malfunction System Observation Cause GuaranteeTroubleshootig Spare partsDCS 400 / DCS Extract from the spare parts list DCS 340 / DCSMakita DCS 340, DCS 341, DCS 400, DCS Sommaire Voir SymbolesEtendue de la fourniture AdditiounelsArrêtez le moteur avant de poser la tronçonneuse Mesures de sé curité supplé mentairesCondition physique Description des symboles figurant sur les tronç onneusesMesures gé né rales de sé curité ’utilisateurTransport de la tronç onneuse Quels vê tements porter?La tronç onneuse Utilisation de la tronç onneuseDé marrage PiedsRavitaillement en carburant Instructions de ravitaillementInstructions de coupe Ré glages importantsConditions de travail Choc de recul Kickback Les limiteurs de profondeurs Affû tage des plaquettes de coupe de la chaînePour é viter le choc de recul Pour é viter la traction Techniques de coupeLe recul Pour é viter le recul= zone d’abattage Instructions d’abattageMé thode de coupe en plongé e Mé thode de sectionnementDé bitage EbranchageEntretien et stockage de la tronç onneuse Entretien et ré parationDé signation des piè ces 13 12 Plaque signatique Longueur Ré fé rence Combinaisons autorisé es de guides et de chaînesCaractéristiques techniques Guide 3/8Montage du rail-guide et de la chaîne de sciage Mise EN RouteStop Huile de chaîne de sciage Frein de chaîneCarburants/ravitaillement Mé lange carburantHuile Usagé e Remplissage des ré servoirsRemarque importante pour les huiles de chaîne de sciage bio Remarque Dé marrer le moteurArrê ter le moteur Dé marrage à froidVé rifier le graissage de la chaîne Vé rifier le frein de chaîneRé glage du carburateur Critè res d’affû tage Marche hivernaleAffû tage de la chaîne De sciagePorter impé rativement des gants de protection Lime et guidage de la limeChangement / nettoyage du pare-é tincelles Remplacement de la cré pine d’aspirationNouvelle chaîne de sciage Vé rification de l’é tincelle d’allumage Remplacement de bougie StopNettoyage du filtre d’air NGK Bpmr 6F ouInstruction dentretien quotidien et pé riodique Service d’atelier, piè ces de rechange et garantieMaintenance et ré parations Panne Systè me Observation Origine Piè ces de rechangeGarantie Recherche de pannesDCS 400 / DCS Extrait de la liste des piè ces de rechangeDCS 340 / DCS Makita U.S.A., INC Makita Canada INC

DCS 400, DCS 341, DCS 401, DCS 340 specifications

Makita has been an industry leader in power tools, consistently delivering high-performance products that meet the needs of professionals and DIY enthusiasts alike. Among their impressive lineup of tools, the Makita DCS 340, DCS 401, DCS 341, and DCS 400 chainsaws stand out for their innovation, reliability, and ease of use. Each model offers unique features that cater to different applications and requirements.

The Makita DCS 340 is designed for versatility and efficiency. Equipped with a powerful 34cc engine, it provides ample power for a variety of cutting tasks. The lightweight design enhances maneuverability, making it an excellent choice for both professionals and home users. One of the key features of the DCS 340 is its advanced anti-vibration system, which reduces fatigue during extended use. The easy-start mechanism further enhances user experience, allowing for quick and hassle-free operation.

Next in line is the DCS 401, which boasts a 40cc engine, offering elevated power for more demanding applications. This model is particularly effective for heavy-duty cutting tasks such as felling larger trees and processing timber. The DCS 401 features a chain brake for improved safety, as well as an ergonomic handle that ensures a comfortable grip and enhanced control. The automatic chain oiling system also ensures consistent lubrication for smoother operation and extends the lifespan of the saw.

The DCS 341 model is similar to the DCS 340 but offers added convenience with its 40cc engine and a slightly different configuration tailored for more intricate work. It includes a tool-less chain adjustment feature, enabling quick and easy chain tension adjustments without additional tools. This model's lightweight design is further enhanced by its compact build, making it ideal for a variety of outdoor jobs like pruning and trimming.

Lastly, the Makita DCS 400 features a robust 40cc engine as well but is specifically designed for professional-grade performance. It excels in demanding environments, thanks to its durable construction and advanced air filtration system. This model significantly reduces wear and tear and increases longevity. The DCS 400 also offers a fast idle for easier cold starts and a transparent fuel tank, allowing for quick visual checks on fuel levels.

Overall, whether you're a professional or a hobbyist, the DCS series from Makita provides reliable, powerful, and user-friendly options for all your cutting needs. Each model is designed with safety, comfort, and efficiency in mind, ensuring that you can tackle any project with confidence.
Top Page Image Contents