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Chain saws with significantly reduced kickback potential are available. 19 5 7 6 5 4 1 2 3 Lift the chain (6) over the sprocket (5). Using your right hand, guide the chain into the top guide groove on the guide bar (7). CAUTION: Note that the cutting edges along the top of the chain must point in the direction of the arrow! Position the guide bar (4) and push against the sprocket (5) as shown by the arrow. Mounting the guide bar and saw chain Use the universal wrench delivered with the chain saw for the following work. Put the chain saw on a stable surface and carry out the following steps for mounting the guide bar and saw chain: Release the chain brake by pulling the hand guard (1) in direction of arrow. Unscrew retaining nuts (2). Pull off the sprocket guard (3). C D PUTTING INTO OPERATION CAUTION: Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protective gloves! CAUTION: Start the chain saw only after having assembled it completely and inspected. B A 20 2 13 3 11 12 6 8 9 10 Guide the chain over the chain catch (9). Pull the guide bar as shown by the arrow to take the slack out of the chain, so that it comes up to the bottom edge of the guide bar (10). Pull the chain (6) around the sprocket nose (8) of the guide bar in the direction of the arrow. H Tightening the saw chain Slightly lift the end of the guide bar and turn the chain adjusting screw (13) to the right (clockwise) until the chain rests against the bottom side of the guide bar. While still holding up the tip of the guide bar, tighten the retaining nuts (2) with the universal wrench. Line up the holes in the sprocket guard (3) with the bolts (11). Turn the chain tensioning screw (H/13) until the chain tensioning bolt (12) is aligned with the hole in the guide bar. Replace the sprocket guard. Manually tighten the retaining nuts (H/2). F E G STOP 2 13 12 1 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 off. 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. Retightening the saw chain Loosenthenuts(2)aboutoneturnwiththeuniversalwrench. Raise the tip of the guide bar a little and turn the chain tensioning screw (13) to the right (clockwise) until the saw chain is again up against the bottom edge of the guide bar (see circle). While keeping the tip of the guide bar raised, tighten the nuts (2) again with the universal wrench. A 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 (1) forward (towards the tip of the saw) with your left hand (arrow 1). Releasing the chain brake Pull the hand guard (1) towards you (arrow 2) until you feel it catch. The brake is now released. C B Chain brake The PS-6400, 7300, 7900 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 10), 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 emergency. 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 work! OILOIL 50:1DOLMARChain 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-degradable oil may even be required by local regulations. The chain oil BIOTOP sold by DOLMAR 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). E BIOTOP chain oil is available in the following sizes: 1 lorder number 980 008 210 5 lorder number 980 008 211 20 lorder number 980 008 213 Bio-degradable oil is stable only for a limited period of time. It should be used within 2 years from the date of manufacture (printed on the container). D DOLMAR oil other oil 1.0 Us-gal. (3.7 l) 2.6 floz. (75 cm3) 2.5 Us-gal. (9.4 l) 6.4 floz. (189 cm3) 5.0 Us-gal. (1...

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