21
PRODUCT CARE
Blade
WARNING
• Power off the riding mower and remove the key
before removing the cutting blade(s) for sharpening
or replacement. Protect your hands by using heavy
gloves when grasping the blade.
• Periodically inspect the blade and/or deck motor
casting for cracks or damage, especially after striking
a foreign object. Do not operate the riding mower
until damaged components are replaced.
CAUTION
If the cutting edge of the blade has previously been
sharpened, or if any metal separation is present, replace
the blade with a new one.
Sharpening or Replacing the Blade
NOTE:
It may be easier to change the blade by first removing
the deck from beneath the riding mower, (refer to Deck Removal
earlier in this section) then gently flip the deck over to expose its
underside. It is possible to change the blade, however, with the
deck still attached to the riding mower. If attempting to change
the blade with the deck still installed on the riding mower, first
move the deck lift lever to its highest (#5) position.
1. Remove the mulch plug, deck chute or bagging chute, if
equipped, exposing the deck chute opening.
2. Using a block of wood or 2 x 4, insert it into the deck opening
and rotate the blade around until it wedges the wood
between the deck opening and the cutting blade (Figure 21).
Figure 21
3. Remove the hex screw (a) and the blade bell support (b)
which holds the blade (c) and the blade adapter (d) to the
deck motor (Figure 22).
a
c
b
d
Figure 22
4. Remove blade (c) and adapter (d) from the deck motor
spindle (Figure 22).
5. To properly sharpen the cutting blade, remove equal amounts
of metal from both ends of the blade 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 (Figure 23).
Figure 23
6. Test the blade’s balance using a blade balancer. Grind metal
from the heavy side until it balances evenly.
WARNING
A poorly balanced blade will cause excessive vibration,
may damage the riding mower and/or result in
personal injury.
NOTE:
When replacing the blade, be sure to install the blade
with the side of the blade marked “Grass-side” or ‘‘Bottom’’
(or with a part number stamped in it) facing the ground when
the riding mower is in the operating position.
7. Reinstall blade when properly sharpened. Torque to 450-600
in-lbs (51-68 N-m).
Summary of Contents for 33 27JD Series
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