Stihl MS 162 Instruction Manual - Page 42
Marking a, Saw Chain Pitch
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English a 21 Inspection and Maintenance 0000-GXX-1446-A0 0000-GXX-1219-A0 The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter. The markings mean the following: Marking (a) 1 2 3 4 6 7 Saw Chain Pitch 1/4" .325" 3/8" .404" 3/8" PICCO 1/4" PICCO To sharpen the chain: ► Shut off the engine and engage the chain brake. ► Select a chain file with a diameter matching the pitch of the chain. Other files are unsuitable and can result in improperly filed chain, which can increase the potential and force of kickback and other reac‐ tive forces. ► Clamp the guide bar if necessary to make fil‐ ing easier. ► To advance the chain, first disengage the chain brake, 12.2. ► Use a file holder. File holders have markings that indicate the proper sharpening angle. ► File all the cutters with an identical angle. Two or three strokes of the file are usually sufficient for simple resharpening. Remove a little mate‐ rial with each stroke. Sharpening at varying or inconsistent angles or heights can be very dangerous and may result in rough or uneven running of the chain and increased wear, even to the point of chain breakage. It also can increase the tendency and force of kickback and other reactive forces. ► Guide the file horizontally at a right angle to the side surface of the guide bar in accord‐ ance with the specified angle. ► File only from the inside of the cutter outward. ► Lift the file on the backstroke. The file only sharpens on the forward stroke. ► Do not file tie straps or drive links. ► Periodically rotate the file in order to avoid uneven wear. ► To remove a file burr from the cutter tooth, run the cutter across a piece of hardwood. ► Check the sharpening angle with a file gauge. All cutters must be of equal length and filed down to the length of the shortest cutter. Otherwise, the tendency and force of kickback and other reactive forces will increase. STIHL recommends having your chain sharp‐ ened by an authorized STIHL servicing dealer to reduce the risk of severe or fatal injury from an improperly sharpened chain. WARNING ■ Depth gauges that are too low increase the potential and force of kickback and other reac‐ tive forces, which can increase the risk of seri‐ ous personal injury. Always maintain the proper distance (a) between the depth gauge and the top of the cutter. a The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness. 0000-GXX-1447-A0 42 0458-200-8621-A