Sears 358.356090-3.7/20 Using the Power Sharpsystem Model, Automatic Sharpening, Power Sharpknob

USING THE POWER SHARP®SYSTEM (MODEL 358.356100)

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•Model 358.356100 is equipped with a Power Sharp ® :System that will perform approximately 80% of the sharpening necessary for the saw chain. The Power Sharp® System uses a built-in grinding stone to shar- pen the cutter top plates and set depth gauges. As

: the built-in sharpener is used, the cutter side plates

.gradually will be altered. Hand filing is required to correct the cutter side plates.

•Sharpen the saw chain when:

--wood chips become small and powdery. Wood chips made by the chain should be about the size of the teeth of the chain.

--saw has to be forced through the cut.

JCAUTION:J ALways wear gloves when handling the chain. The chain can be sharp enough to cut you, even when it is too dull to cut wood.

•Always replace the sharpening stone when --sparks are no longer seen at full adjust.

ment

--only 1/4 inch of stone is remaining

--stone hasbecome cracked or damaged.

--anew chain is installed. The used stone

wilt be worn to the shape of::the old chain and can cause excessive wear to a new

chain. Replacement chain comessupplied with Stone Cartridge Replacement #69099.

Refer to replacement instructions on page 13.

ventional chain is substituted for the Power

Sharp'_Chain. . _See instructions for removing the Stone Cartridge on page 13. Use replacement chain #71-3638.Follow chain sharpening instruc- tions on page 18.

A, AUTOMATIC SHARPENING

1. Stop the engine:

.... 2. Place the saw 'on a solid, flat surface and

make sure that the chain will not contact any object.

3.Adjust the chain with correct tension. Refer to Chain Tension page8.

:'IMPORTANT: The chain must be tensioned correctly for proper sharpening to occur.

4.Start the engine and operate at half to three/

quarters throttle during steps "5", "6", "7", and "8".

NOTE: Saw must be running at half to three/ quarters throttle before knob is pressed.

_: 5:Push the Power Sharp ® i Kn0bdown slowly

:Untit fully pressed down. Figure19.

NOTE:If stone should contact chain before

knob is fully pressed down, release knob and turn knob counterclockwise until condi-

tion does not exist. Repeat :Step "5" again.

6.Turn knob slowly clockwise until sparks can be seen as shown in Figure 19.

SPARKS ARE SEEN HERE

POWER SHARP®KNOB

i Figure i9

NOTE: Pro per sharPePing occurs when a light

flow of sparks is seen: Im proper sharpening is shown by a heavy flowof sparks or no sparks.

7.Release knob and turn one additional "click" clockwise.

NOTE: It is important to turn the knob only one "click" each time the knob is pressed. More turnswilt result in making the chain dull instead of sharp.

8.Press knob firmly against chain and hold for

10-15 seconds or until sparks can no longer be seen.

9..Reteaseknoband stop the engine.

10.Inspect chaincutters.

NOTE: A properly sharpened cutter will show grinding marks across its entire width. Figure 20. If cutters do not appear sharp or burrs are seen on the top front of the cutters, repeat Steps "7" and "8".

:INSPECT CUTTERS FOR GRINDING MARKS

TOP VIEW OF CUTTER

Figure 20

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