Checking And Correcting Mismatch Of Blades; Replacing The Drive Belt - Toro 30366 Operator's Manual

1. Sharpen at original angle
Note: Remove the blades and sharpen them on a
grinder; refer to Removing the Cutting Blades. After
sharpening the cutting edges, install the blade with
the anti-scalp cup and blade bolt. The blade sails
must be on top of the blade. Tighten the blade bolt
to 85-110 ft-lb (115-149 N-m).
Checking and Correcting
Mismatch of Blades
If there is mismatch between the blades, the grass will
appear streaked when it is cut. This problem can be
corrected by making sure that the blades are straight and
all of the blades are cutting on the same plane.
1. Using a 3 foot (1 meter) long carpenters level, find
a level surface on the shop floor.
2. Raise the height-of-cut to the highest position; refer
to Adjusting the Height-of-Cut.
3. Lower the cutting unit onto the flat surface. Remove
the covers from the top of the cutting unit.
4. Rotate the blades until the ends face forward and
backward. Measure from the floor to the front tip of
the cutting edge. Remember this dimension. Then
rotate the same blade so that the opposite end is
forward, and measure again. The difference between
the dimensions must not exceed 1/8 inch (3 mm).
If the dimension exceeds 1/8 inch (3 mm), replace
the blade because it is bent. Make sure to measure
all of the blades.
5. Compare the measurements of the outer blades with
the center blade. The center blade must not be more
than 3/8 in. (10 mm) lower than the outer blades. If
the center blade is more than 3/8 in. (10 mm) lower
than the outer blades, proceed to step 6 and add
shims between the spindle housing and the bottom
of the cutting unit.
6. Remove the bolts, flat washers, lock washers, and
nuts from the outer spindle in the area where
the shims must be added. To raise or lower the
blade, add a shim, Part No. 3256-24, between the
spindle housing and the bottom of the cutting unit.
Figure 34
Continue to check the alignment of the blades and
add shims until the tips of the blades are within the
required dimension.
Important: Do not use more than three shims at
any one hole location. Use decreasing numbers
of shims in adjacent holes if more than one shim
is added to any one hole location.
7. Install the belt covers.

Replacing the Drive Belt

The blade drive belt, tensioned by the spring loaded
idler pulley, is very durable. However, after many hours
of use, the belt will show signs of wear. Signs of a worn
belt are: squealing when belt is rotating, blades slipping
when cutting grass, frayed edges, burn marks and cracks.
Replace the belt if any of these conditions are evident.
1. Lower the cutting unit to the shop floor. Remove
the belt covers from the top of the cutting unit and
set the covers aside.
2. Using a torque wrench or similar tool, move the idler
pulley (Figure 35) away from the drive belt to release
the belt tension and allow the belt to be slipped off
the gearbox pulley (Figure 36).
1. Idler pulley
1. Gearbox
3. Remove the old belt from around the spindle pulleys
and idler pulley.
24
Figure 35
Figure 36