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IMPORTANT in product or property damage. Note: The chain-based cut-off saw is equipped with a two-stroke engine and must always be run using a mixture of gasoline and ICS two-stroke engine oil. It is important to accurately ® measure the amount of oil to be mixed to ensure that correct mixture is obtained. When mixing small amounts of fuel, even small inaccuracies can drastically affect the ratio of the mixture.
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680GC OPERATOR’S MANUAL TITLE OPERATION CUTTING WITH THE 680GC CUT-OFF SAW To start a cut, hold trigger on full throttle and slowly plunge the nose of the guide bar straight into the wall. Lengthen the cut and engage the point of the fixed Wallwalker . Use the fixed Wallwalker as a ® ® pivot point and pull up on the rear handle to rotate the guide bar into the cut. CUTTING TIPS • Always operate the chain-based cut-off saw at full throttle. Apply enough feed force so that the free running RPM drops 20 to 30%. If too much force is applied, the cut-off saw will lug or stall. The diamond chain will not have enough speed to cut effectively. If too little feed force is applied, the diamonds will skid and glaze over. • For straighter cuts use the “step cut” method. First score the entire cut line with the nose of the guide bar approximately 1/2 inch (12mm) to 1 inch (25mm) deep. Next, deepen the cut by about 2 inches (50 mm). This groove will help guide the guide bar for a straight cut. Then plunge all the way through and complete the cut using the fixed Wallwalker ® • Plunge cut instead of starting at the top of the wall. This will reduce chatter, extend diamond life, create a straighter cut and more quickly enable the use of the Wallwalker ® • Use the fixed Wallwalker to help cut more efficiently ® and reduce operator fatigue. The fixed Wallwalker ®...
680GC OPERATOR’S MANUAL TITLE MAINTENANCE Follow these simple maintenance guidelines and the 680GC Cut-Off Saw will keep running at its very best. AFTER EACH USE 1. Rinse the saw, guide bar and diamond chain with water. 2. Follow instructions on the Daily Maintenance Label, located on the air filter cover. 3. Inspect and tighten all fasteners as necessary. 4. Inspect drive sprocket for tooth wear and replace if tooth tips are pointed. 5. Inspect the starter cord. Replace if frayed. 6. Clean air filter. Inspect the air filter for holes. Replace as necessary. 7. Spray saw, guide bar, and chain with lightweight oil. 8. Grease the chain tensioner.
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