Checking And Correcting Mismatch Of Blades - Toro 30555 Operator's Manual

Figure 27
Warning
If the blade is allowed to wear, a slot will form
between the sail and flat part of the blade
(Fig. 27-C). Eventually, a piece of the blade may
break off and be thrown from under the housing,
possibly resulting in serious injury to yourself or
bystanders.
• Inspect the blade periodically for wear or
damage.
• Replace a worn or damaged blade with a new
Toro blade to ensure continued safety
certification of the product.
3. Examine the cutting edges of all blades. Sharpen the
cutting edges if they are dull or nicked. Sharpen only
the top side of the cutting edge and maintain the
original cutting angle to ensure sharpness (Fig. 28). The
blade will remain balanced if the same amount of metal
is removed from both cutting edges.
SHARPEN AT THIS
ANGLE ONLY
END VIEW
Figure 28
Note: Remove the blades and sharpen them on a grinder;
refer to Removing the Cutting Blades, page 19, steps 1
and 2. 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 one cutting blade cuts lower than the others, correct them
as follows:
1. Lower the cutting unit onto a level surface, engage the
parking brake, put the traction pedal in neutral, the PTO
lever in the Off position, shut the engine off, remove the
ignition key, and disconnect the wires from the spark
plugs. Make sure that the tire pressure is equal on all
tires.
2. Raise the height-of-cut to the 4 in. (102 mm) position;
refer to Adjusting the Height-of-Cut, page 13.
3. Rotate the blades so that the tips line up with one
another. The tips of the adjacent blades must be within
1/8 in. (3 mm) of each other. If the tips are not within
1/8 in. (3 mm) of each other, proceed to step 10 and add
shims between the spindle housing and bottom of the
cutting unit.
4. Check to make sure that the front height-of-cut pins are
resting properly on the frame cushions. If the pins are
not resting properly, place a shim or shims under the
cushion to raise it for proper alignment.
5. Position all 3 blades in the "A" position (Fig. 29) and
measure from the level surface to the bottom of the tip
end of each blade (Fig. 30).
B
A
A
C
Figure 29
6. Note the measurement attained at "A", rotate the blades
to the "B" position (Fig. 29), measure the distance of all
of the blades to the level surface, and note the
dimensions (Fig. 30).
MEASURE FROM
BLADE TIP TO LEVEL
SURFACE
Figure 30
7. Rotate the blades to the "C" position, measure, and note
the distance measured (Fig. 29 and 30).
20
B
B
C
A
C