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26
SERVICE AND MAINTENANCE
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 Figure 30.
Figure 30
CAUTION
If the cutting edge of the blade has previously been sharpened, or if any
metal separation is present, replace the blades with new ones.
WARNING
A poorly balanced blade will cause excessive vibration, may damage the
tractor and/or result in personal injury.
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 ft-lbs and 90 ft-lbs.
Changing the Deck Belt
WARNING
The V-belts found on your tractor are specially designed to engage and
disengage safely. A substitute (non-OEM) V-belt can be dangerous by
not disengaging completely. For a proper working machine, use factory
approved belts.
All belts on your tractor are subject to wear and should be replaced if any signs of wear
are present . To change or replace the deck belt on your tractor, proceed as follows:
1. Remove the deck as instructed earlier in this section under Cutting Deck Removal.
NOTE: On some decks it may be necessary to remove the spindle covers to
remove and/or install the new belt. To remove the spindle covers, remove
the screws securing them to the deck.
2. Loosen, but do not remove the flange lock nut on the left idler pulley for 50”
and 54” Decks and the right idler pulley for 42” and 46” Decks. See Figure 31
for 42” Decks, Figure 32 for 46” Decks and Figure 33 for 50” and 54” Decks.
Hex Screw
Flange Lock Nut
Figure 31
Hex Screw
Flange Lock Nut
Figure 32
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