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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. 19.
3.
Remove the hex flange nut that secures the blade to the spindle
assembly. See Fig. 19.
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. 20.
SERVICE AND MAINTENANCE
Figure 19
Figure 20
If the cutting edge of the blade has previously been sharpened, or if
any metal separation is present, replace the blades with new ones.
A poorly balanced blade will cause excessive vibration, may cause
damage to 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.
Use a torque wrench to tighten the blade spindle hex flange nut to
between 70 lbs-ft and 90 lbs-ft.
CHANgiNg THe DeCk beLT
Be sure to shut the engine off, remove ignition key, disconnect the
spark plug wire(s) and ground against the engine to prevent unin-
tended starting before removing the belt.
All belts on your tractor are subject to wear and should be replaced if
any signs of wear are present.
IMPORTANT: The V-belt found on your tractor is 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.
To change or replace the deck belt on your tractor, proceed as follows:
1.
Remove the deck as instructed earlier in this section.
2.
Remove the belt covers by removing the hex screws that fasten
them to the deck. See Fig. 21.
3.
It may also be necessary to loosen the hex nut on the left idler
pulley to get the belt off the pulley and around the belt guard.
4.
Carefully remove the deck belt from around the two spindle
pulleys and the two deck idler pulleys. See Fig. 21.
5.
To place the new belt, begin by routing the belt around the two
outer spindle pulleys as shown in Fig. 21.
6.
Then route the belt around the two deck idler pulleys as shown in
Fig. 21.
7.
Retighten the belt keeper rod loosened earlier.
8.
Remount the belt guards removed earlier.
9.
Re-install the deck, making sure the belt remains routed around
the pulleys as instructed. The complete belt routing is shown in
Fig. 22.
10.
Pull the right side of the belt, and place the narrow V side of the
belt into the PTO pulley.
80
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