Assessments - 3, GPA: 4.7
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4. Remove burrs from sides of guide bar. Use flat file to make side edges square. Replace guide bar when • bar is bent or cracked • inside groove of bar is badly worn Note: When replacing guide bar, see Replacement Parts and Accessories, page 21, for proper bar. SHARPENING SAW CHAIN WARNING: Unplug chain saw from power source before servicing. Severe injury or death could occur from electrical shock or body contact with moving chain. WARNING: Cutting edges on chain are sharp. Use protective gloves when handling chain. Keep chain sharp. Your saw will cut faster and more safely. A dull chain will cause undue sprocket, guide bar, chain, and motor wear. If you must force chain into wood and cutting creates only sawdust with few large chips, chain is dull. Items Needed to Sharpen Chain Purchase these items from your local dealer, hardware store, or chain saw supplies outlet. • 5/32" round file •Depth gauge tool • File guide •Vise • Medium sized flat file Sharpening Cutters Use file guide for 30° filing. 1. Adjust chain for proper tension (see Saw Chain Tension Adjustment, pages 16 and 17). 2. Clamp guide bar in vise to hold saw steady. Note: Do not clamp chain. 3. Press 5/32" round file (attached to file guide) into groove between top plate and depth gauge on chain. File guide should rest on both top plate and depth gauge (see Figure 19). Note: File at midpoint of guide bar. 108539 20 CLEANING AND MAINTENANCE Continued 4. Hold file guide level. Make sure 30° mark on file guide is parallel to center of guide bar (see Figure 19). This will insure that you file cutters at 30° angle. 5. File from inside towards outside of cutter until sharp. Only file in this one direction (see Figure 19). Note: Two or three strokes with file should sharpen cutter. 6. After each cutter is sharpened, move chain forward to sharpen next cutter. File all cutters on one side of chain. 7. Move to other side of chain and repeat process. Filing Cutter Depth Gauges The cutter depth gauge clearance is reduced as cutters are sharpened. After every second or third sharpening, reset cutter depth gauges. 1. Place depth gauge tool (.025") firmly across top of two cutters. Make sure depth gauge enters slot in depth gauge tool (see Figure 21). 2. Use medium flat file. File depth gauge level with depth gauge tool. 3. Remove depth gauge tool. With flat file, round off front corner of cutter depth gauge (see Figure 22). After several hand filings, have authorized service center or sharpening service machine sharpen chain. This will insure even filing. REPLACING SAW CHAIN Replace chain when cutters are too worn to sharpen or when chain breaks. Only use replacement chain noted in this manual. Always include new drive sprocket when replacing chain. This will maintain proper driving of chain. Note: For proper chain and drive sprocket, see Replacement Parts and Accessories. STORAGE If storing saw for more than 30 days, follow steps below. 1. Drain oil tank. 2. Remove and clean gu...
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