Cutting Decks And Lift Shaft
135
To remove the blades:
1. Remove the deck as described in the previous
section of this chapter or lift the tractor using a
professional grade lift.
2. Remove the blade nuts using an impact wrench
and a 15/16” socket. See Figure 8.8.
CAUTION: Use care around the blade while
removing or tightening the nut. The blade can
spin and cause an injury to the technician.
3. Remove the blade.
4. When sharpening the blades:
• 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.
IMPORTANT: If the cutting edge of the blade
has already been sharpened to within 1 5/8”
from the edge, or if any metal separation is
present, replace the blades with new ones.
• It is important that each cutting blade edge be
ground equally to maintain proper blade bal-
ance.
CAUTION: A poorly balanced blade will cause
excessive vibration and may cause damage to
the tractor and result in personal injury.
• The blade can be tested by using a blade bal-
ancer. Grind metal from the heavy side until it
balances evenly.
Figure 8.8
Blade nut
5. Install the blade by following the above steps in
reverse order. Tighten the blade nut to a torque
of 70 - 90 ft-lbs ( 95 - 122 Nm).
NOTE: The 900 series blades have a star cen-
ter. The star must seat on the raised star on the
bottom of the spindle shaft with the fins of the
blade pointing to the deck. If there is damage to
the raised star of the spindle shaft, the spindle
must be replaced. See Figure 8.9.
Figure 8.9
Star center
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