Sharpening And Balancing The Mowing Blade - Stihl RMA 460 V Manual De Instrucciones

23 Inspection and Maintenance
► Use a caliper to check the blade thickness. Blade
thickness must be at least a = 0.05 in. (2.0 mm) at its
narrowest point.
► Use a caliper to check the blade width. Blade width must
be at least b = 1 in. (45 mm) at its narrowest point.
► Replace the mowing blade if the measured blade
thickness and width are outside the permissible limits.
► Check the sharpening angle. Sharpen the mowing blade,
if the sharpening angle is not c = 30°.

23.3 Sharpening and Balancing the Mowing Blade

WARNING
Never use a dull or damaged mowing blade. Working with a
dull blade leads to increased physical strain, increased
vibration load, unsatisfactory cutting results and increased
wear, which can result in loss of control and injury to the
operator or bystanders. A damaged mowing blade may
vibrate, crack, break or come off the lawn mower, which may
result in serious or fatal injury or property damage. Make
sure the mowing blade is sharp and in good condition before
starting work.
WARNING
An improperly balanced mowing blade can increase the risk
severe personal injury or death. STIHL recommends having
your mowing blade sharpened and balanced by an
authorized STIHL servicing dealer to reduce the risk of
severe or fatal injury.
0458-818-8621-A
WARNING
b
The mowing blade has sharp edges. If it contacts your flesh,
it may cut you, even if it is not moving. Always wear heavy-
duty work gloves when sharpening or otherwise handling the
mowing blade, @ 5.5.
To sharpen the mowing blade:
► Remove the mowing blade, @ 23.4.
a
c
► Use a flat file to sharpen a dull mowing blade (1). In case
of more serious wear or nicks, resharpen with a grinder or
have it sharpened by an authorized STIHL servicing
dealer.
► Guide the file horizontally at a right angle to the side
surface (2) in accordance with the specified 30° angle.
► Lift the file on the backstroke. The file only sharpens on
the forward stroke.
► Turn the mowing blade and sharpen the other side
accordingly.
To balance the mowing blade:
► After resharpening about 5 times, check the mowing blade
for out-of-balance on a STIHL balancer (special
accessory) or have it checked and rebalanced by an
authorized STIHL servicing dealer as necessary.
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