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Cutting Blades
WARNING!
Shut the engine
off and remove
ignition
key before removing
the cutting
blade(s) for
sharpening
or replacement.
Protect your hands by
using heavy gloves when grasping
the blade
WARNING!
Periodically
inspect
the blade and/or
spindle for cracks or damage,
especially
after you've
struck a foreign
object.
Do not operate the machine
until
damaged
components
are replaced.
To remove the blades, proceed
as follows.
1.
Remove the deck from beneath
the tractor, (refer to
Cutting
Deck Removal earlier in this section)
then gently
flip the deck over to expose its underside.
2.
Place a block of wood between
the center deck housing
baffle and the cutting
blade to act as a stabilizer.
See Fig. 7-3.
3.
Remove the hex flange nut that secures the blade to the
spindle
assembly. See Fig. 7-3.
4.
To properly
sharpen
the cutting
blades, remove equal
amounts
of metal from both ends of the blades along the
cutting
edges, parallel
to the trailing
edge, at a 25 % to 30 °
angle. Always grind each cutting
blade edge equally
to
maintain
proper
blade balance. See Fig. 7-4.
_
AUTION:
If the cutting
edge of the blade has
previously
been sharpened,
or if any metal
separation
is present, replace the blades with new
ones.
i&ll
WARNING!
A poorly
balanced
blade will cause
excessive vibration,
may damage
to the tractor and/
or result in personal
injury.
Figure 7-3
Figure
7-4
5.
Test the blade's balance
using a blade balancer. Grind
metal from the heavy side until it balances evenly.
NOTE:When
replacing
the blade, be sure to install the blade with
the side of the blade marked
"Bottom"
(or with a part number
stamped
in it) facing the ground
when the mower is in the
operating
position.
CAUTION:
Use a torque
wrench
to tighten
the
blade spindle
hex flange
nut to between
70 Ibs-ft
and 90 Ibs-ft.
SECTION 7--
SERVICE
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