Cutting Decks
153
Blades come in a variety of styles; side discharge, mulching, bagging, combination, there are even de-thatching
blades on the market.
The cutting deck on the 700 series tractor is mounted with a slight rake, meaning that the front of the deck is a 1/
4” - 3/8” lower than the rear of the deck. This is very important to get the proper air flow in the deck so that the blades
can make the grass blades stand up to get cut.
Air flow under the cutting deck is generated by the spinning blades. If the blades are mounted upside down, the
air flow will be reversed, pushing the grass down instead of standing up.
NOTE: Blades that are mounted upside down increase the risk of impact damage.
Blade Removal
1. Remove the deck as described in the previous sec-
tion of this chapter or lift the tractor using a profes-
sional grade lift.
2. Remove the blade nuts using an impact wrench and
a 15/16” socket.
See Figure 8.9.
3. Remove the blade.
4. 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 balance.
• Blade balance can be checked by using a blade balancer. Grind metal from the heavy side until it bal-
ances evenly.
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 700 series blades have a star center. The star must seat on shaped boss on the bottom of the
spindle shaft with the wings of the blade pointing to the deck. If there is damage to the raised star of the
spindle shaft, the spindle must be replaced.
Figure 8.9
Blade nut
Use care around the blade while
removing or tightening the nut. The
blade can spin and cause an injury
to the technician.
! CAUTION! CAUTION
A poorly balanced blade will cause excessive vibration and may damage the tractor and
result in personal injury.
! CAUTION! CAUTION
FOR DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
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