Chain Sharpening, Tools required, Right, Wrong

Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw.

CHAIN SHARPENING

WARNING: Improper chain sharp- ening techniques and/or depth gauge mainte- nance 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:

SReduction 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.

SSaw cuts to one side or at an angle. S Saw has to be forced through the cut.

Tools required:

S3/16 inch (4,5 mm) diameter round file and file holder

SFlat file

SDepth gauge tool

TO SHARPEN CHAIN:

1.Move ON/STOP switch to the STOP position.

2.Check chain for proper tension. Adjust chain tension if necessary. See CHAIN TENSION section.

3.Sharpen cutters.

STo 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

SFile on the forward stroke only. Use 2 or 3 strokes per cutting edge.

SKeep all cutters the same length when filing.

SFile enough to remove any damage to cutting edges (side plate and top plate of cutter).

All Cutters	Remove Damage
Same Length
	Top Plate
	Side Plate

SFile chain to meet the specifications as shown.

60˚60˚

25˚

Hook Angle

		0.025 inch
		(0.65 mm)
		Rounded
Right		Corner
Right
Too Much Hook Angle		Squared Off
		Corner
Wrong
WARNING:	Maintain the proper

hook angle according to the manufacturer’s specifications for the chain you are using. Im- proper hook angle will increase the chance of kickback which can result in serious injury.

4. Check and lower depth gauges.

Cutter

90˚

Depth Gauge

SAlign the 25˚ file holder marks paral- lel with the bar and to the center of the chain.

Depth Gauge

Cutter

SPlace gauge tool on cutter.

SIf the depth gauge is higher than the depth gauge tool, file it level to the top of

the depth gauge tool.

25˚	Cutter
File Holder Line

SMaintain rounded front corner of depth gauge with a flat file.

NOTE: The very top of the depth

SSharpen 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 pro- cess for the other side of the chain.

gauge should be flat with the front half rounded off with a flat file.

If you require further assistance or are unsure about performing this procedure, contact your authorized service dealer or call our customer assistance help line at 1--800--554--6723.

952802075 specifications

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