SERVICE AND ADJUSTMENTS (PRUNER ATTACHMENT) Disconnect the spark plug before performing maintenance, service, or adjustments except for idle speed adjustments. WARNING: CHAIN SHARPENING WARNING: Improper chain sharpening techniques and/or depth gauge maintenance will increase the chance of kickback which can result in serious injury. WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving. Conditions which indicate the need for chain sharpening: S Reduction in size of wood chips. The size of the wood chip will decrease as the chain gets duller until it becomes more like a powder than a chip. Note that dead or rotted wood will not produce a good chip. S Saw cuts to one side or at an angle. S Saw has to be forced through the cut. Tools required: S 3/16 inch (4,5 mm) diameter round file and file holder S Flat file S Depth gauge tool S Sharpen cutters on one side of the chain first. File from the inside of each cutter to the outside. Then, turn the chain saw around and repeat the process for the other side of the chain. S File on the forward stroke only. Use 2 or 3 strokes per cutting edge. S Keep all cutters the same length when filing. S File enough to remove any damage to cutting edges (side plate and top plate of cutter). Remove Damage All Cutters Same Length Top Plate Side Plate S File chain to meet the specifications as shown. 75° 60° 30° Hook Angle 0.025 inch (0.65 mm) Rounded Corner Squared Off Corner TO SHARPEN CHAIN: 1. Disconnect spark plug. 2. Check chain for proper tension. Adjust chain tension if necessary. See CHECK CHAIN TENSION section. 3. Sharpen cutters. S To sharpen the cutters, position the file holder level (90° ) so that it rests on the top edges of the cutter and depth gauge. NOTE: The chain has both left and right hand cutters. File Holder File 90° Depth Gauge Right Too Much Hook Angle Cutter Wrong S Align the 30° file holder marks parallel with the bar and to the center of the chain. Cutter WARNING: Maintain the proper hook angle according to the manufacturer's specifications for the chain you are using. Improper hook angle will increase the chance of kickback which can result in serious injury. 4. Check and lower depth gauges. Depth Gauge Tool File Depth Gauge 30° File Holder Line Cutter 25