Dewalt DCCS670X1 Instruction Manual - Page 12

English • Flip up locking lever and rotate the bar adjust locking knob 8 counterclockwise as shown in Figure D to remove sprocket cover 6 . • Wearing protective gloves, grasp the saw chain 5 and wrap it around the guide bar 4 , ensuring the teeth are facing the correct direction (see Figure H). • Ensure the chain is properly set in the slot around the entire guide bar. • Place the saw chain around the sprocket 18 . While lining up the slot on the guide bar with chain tensioning pin 20 , and the bolt 19 , on the base of the tool as shown in Figure E. • Once in place, hold the bar still, replace sprocket cover 6 . Make sure tool-free tension assembly bolt hole on the cover lines up with the bolt 19 , in the main housing. Flip up locking lever and rotate the bar adjust locking knob 8 clockwise until it clicks, then loosen knob one full turn, so that the saw chain can be properly tensioned. • Rotate the chain tensioning knob 9 clockwise to increase tension as shown in Figure F. Make sure the saw chain 5 is snug around the guide bar 4 . Tighten the bar adjust locking knob until it clicks. The bar is secure after three audible clicks are heard. Further tightening is not required. Fig. D Fig. E 18 19 20 Fig. F Adjusting Chain Tension (Fig. A, G ) CAUTION: Sharp chain. Always wear protective gloves when handling the chain. The chain is sharp and can cut you when it is not running. WARNING: Sharp moving chain. To prevent accidental operation, ensure that battery is removed from the tool before performing the following operations. Failure to do this could result in serious personal injury. • With the saw on a flat, firm surface, check the saw chain 5 tension. The tension is correct when the chain snaps back after being pulled 1/8" (3 mm) away from the guide bar 4 with light force from the index finger and thumb as shown in Figure I. There should be no "sag" between the guide bar and the chain on the underside as shown in Figure G. • To adjust saw chain tension, flip up locking tab and rotate the bar adjust locking knob 8 counterclockwise one full turn. Rotate the chain tensioning knob 9 clockwise until the chain tension is correct as instructed above. • Do not over-tension the chain as this will lead to excessive wear and will reduce the life of the bar and chain. • Once chain tension is correct, securely tighten bar adjust locking knob. NOTE: The bar adjust locking knob has a detent tightening system. The sprocket cover is secure after three audible clicks are heard. Further tigtening is not required. • When the chain is new, check the tension frequently (after removing battery) during the first 2 hours of use as a new chain stretches slightly. Fig. G 1/8" (3 mm) 10