Stihl MS 162 Instruction Manual - Page 41
Inspecting, Maintaining and, Sharpening the Saw Chain
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21 Inspection and Maintenance ► Flip the guide bar after each sharpening and each time the chain is changed. This will help reduce uneven wear. There is no "top" or "bot‐ tom" of the bar. It may be used in either orien‐ 2 tation, even though the printing on the bar may be upside down. English 1 0000-GXX-1218-A0 1 3 0000-GXX-2951-A0 2 3 ► Clean the oil outlet duct (1), oil inlet bore (2) and groove (3) with a brush, a slightly damp‐ ened cloth or resin solvent, such as STIHL Resin Remover & Lubricant. Do not use deter‐ gents. ► Periodically remove any metal burrs that develop along the guide bar with a flat file or a STIHL guide bar dressing tool. ► Replace the guide bar if the burrs cannot be filed or if the guide bar becomes damaged. 21.5 Inspecting, Maintaining and Sharpening the Saw Chain WARNING ■ An improperly sharpened chain can increase the risk of kickback and other reactive forces, resulting in severe personal injury or death. For example, depth gauges that are too low or cutters that are filed incorrectly can increase the kickback tendency of the chain saw and can increase kickback forces, making it more difficult to control the saw. Always review and follow the sharpening angles and dimensions recommended by STIHL when checking or sharpening the chain. WARNING ■ Never use a dull or damaged chain. This leads to increased physical strain, increased vibra‐ tion load, unsatisfactory cutting results and increased wear. If the chips from cutting are fine, more like saw dust than wood chips, the chain likely is dull. ► Shut off the engine and engage the chain brake. ► Check the height of the depth gauge (1) with a STIHL file gauge (2) matching the pitch of the chain. ► If the depth gauge protrudes higher than the file gauge, file the depth gauge to the appro‐ priate height. ► Work carefully. Do not file the depth gauge too low. A depth gauge that is too low must be replaced or sharpened by an authorized STIHL servicing dealer, as it can increase the kickback tendency of the chain saw and can increase kickback forces. 1 2 3 0000-GXX-1372-A0 4 STIHL chain is manufactured with wear marks to help the operator identify excessive wear. The wear marks depicted above (1 - 4) must remain visible. ► Replace the chain if any wear marks are no longer visible. ► Check the 30° sharpening angle of the cutters with a STIHL file gauge matching the pitch of the chain. ► If the sharpening angle is incorrect, file the cutters to a 30° angle. ► If you are unable to achieve the proper angle, or suspect you have not achieved the proper angle, have the chain sharpened by an author‐ ized STIHL servicing dealer. An improperly filed chain can be very dangerous. It can increase the potential for reactive forces, including kickback, and also increase the magni‐ tude of those reactive forces. 0458-200-8621-A 41