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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 See Figure 7-2
Blade Separation
Worn Blade
Edge
Wind Wing
Sharpen
Edge
Evenly
15/8 inch
_
J
Figure 7-2
•
It is important
that each cutting
blade edge be ground
equally to maintain
proper blade balance
•
A poorly balanced blade will cause excessive vibration
and may cause damage to the tractor and result in per-
sonal injury The blade can be tested by balancing
it on
a round shaft screwdriver
Grind metal from the heavy
side until it balances evenly
IMPORTANT:
When replacing the blades, make certain the
side of the blade marked "Bottom"
faces the ground
when
the mower is turned to the operating
position
IMPORTANT:
Note that the stars of the blades (and spin-
dles) are not symmetrical
The blade can be installed
on
each spindle in only one direction
Carefully align the star
hole of the blade with the star of the spindle shaft when
installing
each blade DO NOT improperly
align the blade
and spindle shaft, and attempt
to seat the blade onto the
spindle by tightening
the hex flange nut
•
Rotate the blade as necessary to align its star hole
with the star of the spindle shaft, then slide the blade
onto the spindle shaft Thread the hex flange onto the
spindle shaft and use a torque wrench to tighten the
hex flange nut to 70 to 90 foot-pounds
•
Repeat the above procedure to install the other blade
Changing the PT0Belt
_
ARNING:
Be sure to shut the engine off,
remove ignition
key, disconnect
the spark plug
wire(s) to prevent unintended
starting
before
removing
the belt(s)
All belts on your tractor are subject to wear and should be
replaced if any signs of wear are present
IMPORTANT:
Do not use substitute
belts The V-belt found
on your tractor is specially designed
for optimal
perfor
mance and service life for your deck application
Use only
OEM original replacement
belts
To replace the PTO belt, proceed as follows:
Remove the deck from beneath the tractor (refer to Cut-
ting Deck Removal)
Maneuver
the PTO belt downward
and off the idler
pulley on the spring loaded idler bracket
NOTE: It may
be necessary to loosen the hex cap screw and flange
lock nut securing the pulley to the idler bracket to fit
the belt between
the pulleyand
bracket
Slide the belt
between
the bottom
of the idler pulley and top of the
timing
belt idler pulley below
See Figure 7-3
Fixed Idler
Idler Bracket
Pulley
and Pulley
\
Figure 7-3
•
Loop the belt and push out of the V- groove of the drive
pulley on the right hand spindle assembly
Lift the belt
over the pulley and out from beneath the spindle cover
See Figure 7-3
•
Loop the new PTO belt and slide between
the top of
the drive pulley and spindle cover Maneuver
the belt
around and into the V-groove of the drive pulley
•
Route the back side of the belt around idler pulley and
between
the idler pulley and idler bracket
Re-tighten
the hex screw and flange lock nut if loosened earlier
Refer to Figure 7-3
•
Route the belt around the fixed idler pulley as shown
in Figure 7-3 and re-install the deck as described
in "Re-
installing
the Cutting
Deck" later in this section
Changing the TimingBelt
_
ARNING:
Be sure to shut the engine off,
remove ignition
key, disconnect
the spark plug
wire(s) to prevent unintended
starting
before
removing
the belt(s).
To replace the timing
belt, proceed as follows:
•
Remove the deck from beneath the tractor (refer to Cut-
ting Deck Removal).
•
Remove the PTO belt drive pulley of the right hand
spindle assembly as described
in "Changing
the PTO
Belt."
•
Remove the hex screw, flat washer, lock washer, shoul-
der spacer, and flange lock nut that make up the idler
bracket backstop. NOTE: It may be necessary to clean
the underside
of the mowing
deck to access the hex
screw. Refer to Figure 7-4.
SECTION 7--
SERVICE
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