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NOTE: Before tightening the chain, loosen the two nuts (2) slightly. Checking the chain tension The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand. While doing so the chain brake must be released. Check the chain tension frequently -new chains tend to get longer during use! When checking the chain tension the engine must be switched aff, NOTE: It is recommended to use 2-3 chains alternatively. In order to guarantee uniform wear of the guide bar the bar should be turned over whenever replacing the chain. Chain brake The DCS 6400.6401,7300,7301,7900,7901 comes with an inertia chain brake as standard equipment. If kickback occurs due to contact of the guide-bar tip with wood (see SAFETY PRECAUTIONS, page 9),the chain brake will stop the chain through inertia if the kickback is sufficiently strong. The chain will stop within a fraction of a second. The chain brake is installed to block the saw chain before starting it and to stop it immediately in case of an emergen- CY- IMPORTANT: NEVER run the saw with the chain brake activated (except for testing, see "Testing chain brake")! Doing so can very quickly cause extensive engine damage! ALWAYS release the chain brake before starting the saw! Engaging the chain brake (braking) If the kickback is strong enough the sudden acceleration of the guide bar combined with the inertia of the hand guard (1)will automatically actuate the chain brake. To engage the chain brake manually, simply push the hand guard(I)fotward (towards the tip of the saw) with your left hand (arrow 1). Releasing the chain brake Pull the hand guard (2) towards you (arrow 2) until you feel it catch. The brake is now released. Fuel CAUTION: This saw is powered by mineral-oil products (gasoline (petrol) and oil). Be especially careful when handling gasoline (petrol). Avoid all flame or fire. Do not smoke (explosion hazard). Fuel mixture The engine of the chain saw is a high-efficiency two-stroke engine. It runs on a mixture of gasoline and two-stroke engine oil. The engine is designed for unleaded regular gasoline with a min. octane value of 91 ROZ. In case no such fuel is available, you can use fuel with a higher octane value. This will not affect the engine. Inorderto obtain an optimum engine output and to protect your health and the environment use unleaded fuel only. Gasoline which contens alcohol should not used in MAKITA products. For lubricating the engine use a two-stroke engine oil (quality grade: TC-3), which is added to the fuel. The engine has been designed for use of MAKITA high-performance two-stroke engine oil and a mixture ratio '3only 50:l to protect the environment. In addition, a long service life and reliable oper- ation with a minimum emission of exhaust gases are ensured. MAKITA high-performance two-stroke engine oil is available in the following sizes to suit your individual requirements: 1 I order number 980 008 607 100 ml order number 980 008 606 In case MAKITA high-performance two-stroke engine oil is not available, it is urgently recommended to use a mixture ratio of 40:l with other two-stroke engine oils, as otherwise optimum operation of the engine cannot be guaranteed. The correct mixture ratio: 50:l when using MAKITA high-performance two-stroke en- gine oil, i. e. mix 50 parts gasoline with 1 part oil. 40:l when using other two-stroke engine oils, i. e. mix 40 parts gasoline with 1 part oil. NOTE: For preparing the fuel-oil mixture first mix the entire oil quantity with half of the fuel required, then add the remaining fuel. Thoroughly shake the mixture before filling it into the chain saw tank. Chain oil Use an oil with adhesive additive for lubricating the chain and guide bar. The adhesive additive prevents the oil from being flung off the chain too quickly. We recommend the use of chain oil which is bio-degradable in order to protect the environment. The use of bio-degradableoil may even be required by local regulations. The chain oil BIOTOP sold by MAKITA is made of special vegetable oils and is 100% bio-degradable. BIOTOP has been granted the "blue angel" (Blauer Umweltschutz-Engel) for being particularly environment-friendly (RAL UZ 48). Gasoline 50:l 1 40:l 1.0Usgal. (3.7 I) 2.5flor (75m3) 3.2Roz. (Man3) 2.5 Us-gal. (9.4I) 6.4Roz. (189an)) 8.0floz. (236d) 5.0Usgal. (18.9I) 2.8floz. (378an))16.0floz. (473an)) Itis not wise to add more engine oil than specified to ensure safe operation. This will only result in a higher production of combus-tion residues which will pollute the environment and clog the exhaust channel in the cylinder as well as the muffler. In addition, fuel consumption will rise and perform- ance will decrease. NOTE: Fuel cannot be stored for an unlimited period of time. Buy only as much as will be consumed in 4 weeks. Use only approved and marked containers for transport and storage. AVOID SKIN AND EYE CONTACT Mineral oil products degrease your skin. If your skin com...

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