Sears 358.79828 - Manual (Page 23)

SERVICE AND ADJUSTMENTS
ILADE SHARPENING
A
DANGER:
ALWAYS STOP THE ÈNGÌNE BEFORE
SHARPENING A BLADE. THE BLADE
WILL CONTINUE TO SPIN AFTER THE
ENGINE STOPS OR AFTER THE
THROTTLE TRIGGER HAS BEEN RE­
LEASED. MAKE SURE THE BLADE HAS
STOPPED COASTING AND DISCON­
NECT THE SPARK PLUG BEFORE PER­
FORMING WORK ON THE BLADE.
ALWAYS REPLACE A BLADE THAT IS
BENT, WARPED, CRACKED, OR DAM­
AGED IN ANY OTHER^WAY: NEVER ÀT-
TEHPTTO STRAIGHTEN AND RE^SE A
DAMAGED BLADE. USE ONLYTHE SPE­
CIFIED replacem S ntriade .
WEAR PROTECTIVE GLOVES WHEN
HANDLING OR PERFORMING MAINTE­
NANCE ON THE BLADE TO HELP AVOID
INJURY.
TO PREVENT THE BLADE FROM CRACK­
ING OR FLYING APART AFTER SHARP­
ENING, DO NOT FILE WITHIN 1/4 INCH OF
THE RADII SHOWN
BRUSH TRI-BLADE SHARPENING
(Fig. 37)
• The 3 point, 10 inch blade is reversible. When the
cutting edge on one side becomes dull, turn the blade
over, ^hen both sides of cutting edges become dull,
the blade may be resharpened.
• Check blades for flatness periodically. Lay the
blade on aflat surface and inspect the blade for flatness
before sharpening. Throw away any blade that is not
flat.
• RIe or grind each edge in the same manner to
maintain a balanced blade. Balance can be checked
by hanging the blade on a nail at ttireé positions allow­
ing each point td face nordi. If the blade rotates at any
time, ft is not balanced; therefore, file the heawer edge.
• if abnormal vibration occurs after blade sharpen-~
jng,.stop ttie unit, remove the blade from the uriit, and
rêchèck blade balance.
ME LIMITER
When the cutting edge on one side becomes dull, turn
ttie blade over.
When both sides of cuttirig edges become dull, sharp­
en with a flat file.
The line limiter can be shaipened-whiie.attached to the
plastic line trimmer shield.
Avoid damage to the plastic shield while sharpening the
limiter blade.
SAW BLADE SHARPENING (Fig. 38)
• (^eck blades for flatness penodically. Lay the
blade on a flatsurface and inspect the blade for flatness
before sharpening. Throw away any blade that is not
flat
« RIe or grind each edge in the same manner to
maintain a balanced blade. Balance can be checked
by hanging the blade on a nail at two positions, 90 de­
“ grees apart If the blade rotates at any time, then it is
not balanced; therefore, file the heavier edge.
• If abnormal vibration occurs after blade sharpen­
ing, stop the unit, remove the blade from the unit, and
recheck blade balance.
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