Metal Blades; Removal; Installation - Toro 51643 Service Manual

SECTION
Tor0 offers two 20 cm
(8 inches) blades that fit the
straight shaft trimmer line. The eight tooth blade is
designed for cutting brush and heavy weeds up to about
1.3 cm (1/2 inches). The eighty tooth blade should be
used in heavy brush and if scrub trees greater than 2 cm
(3/4") are present.
When using either blade, a harness is required to help
maintain adequate control.
A
CAUTION: Never attempt any
service of the trimmer head
without first shutting
off
the
engine and allowing the
implement to come to a complete stop.
Metal Blade Removal
1. Remove the cotter pin from the cutter head drive
shaft.
2. Insert a flat bladed screwdriver into the slot in the
top of the shield to prevent the blade from rotating
during removal. See Figure 159.
SLOTS
Figure 159
3. Remove the nut securing the blade by turning
clockwise (the nut uses left hand threads).
4. Remove the blade adapter and blade. Inspect the
blade for damage or cracks and replace if
necessary.
Metal Blade Installation
Note: If you are installing either the saw blade or the
brush blade for the first time, you will require the Metal
Blade Adapter Kit for Gas Trimmer, Tor0 part number
41-4440.
1. Mount the blade on the cutter head shaft. There
should be a perfect fit between the lower gearbox
cover flange and the hub on the blade.
IMPORTANT
It
is important to install the blade
with the teeth pointing in the correct direction.
Make sure that they are pointing as shown in
Figure
160.
Figure 160
2.
Place the blade adapter on the shaft and loosely
secure with the hex nut.
NOTE: The hex nut uses left hand threads and
therefore must be turned counterclockwise to
tighten.
3.
Insert a flat bladed screwdriver into the slot in the
top of the shield to prevent the blade from turning
while tightening the nut. See Figure 159.
CAUTION: The teeth on the
metal blades are very sharp.
gloves are
recommended when installing
or removing the blade.
4. Insert a cotter pin in the shaft to prevent the hex
nut from backing out.
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