Removal From Drive Tube; Installation On Drive Tube - Toro 51643 Service Manual

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.
The shield is an important device which is intended to
help prevent the operator's feet from coming into contact
with the cutter implement and reduce the amount
of
flying debris. Do not operate the trimmer without the
shield in place.
Shield Removal from Drive Tube
1.
Remove the cutter implement by inserting a flat
blade screwdriver into the hole in the top of the
shield, then rotating the cutter implement
clockwise (as viewed from the bottom of the
trimmer). See Figure 124.
CAUTION: Heavy gloves are
recommended when installing
or removing the blade to avoid
lacerations.
Figure 124
4.
Remove the four machine screws and nylon lock
nuts that secure the two portions of the shield to
the shield bracket.
5.
The shield bracket can be removed if desired by
first removing the gearbox. Remove the gearbox
be removing the locating screw, and the
two
clamping screws then pulling the gearbox straight
off
the shaft.
6. Remove the shield bracket by loosening the two
clamping screws and sliding the bracket off the
shaft.
Shield Installation on Drive Tube
See Figure 125.
2. Remove the dust cap from the drive shaft.
3. Remove the three screws securing the shield to the
gearbox and, on units with serial numbers
60000001 and up, remove the grass wrap shield.
GEARBOX
SPACER
\
Figure
125
1.
If the shield bracket was removed earlier, begin by
sliding
it
onto the drive tube. Do not tighten the
clamping screws at this time.
2. Before installing the gearbox make sure that the
drive shaft is properly positioned in the drive tube.
See Figure 126.
3. Slide the gearbox onto the drive tube.
It
may be
necessary to rotate the cutter implement slightly to
get the drive shaft to line up with the upper gear of
the gearbox. Remove the locating screw and
visually line up the locating screw hole and the hole
in the drive tube. Insert the locating screw and
tighten single locating screw and
two
clamping
screws.
52