Sears 486.24412 - Manual (Page 6)

1. Assemble one 1/2" x 4" hex bolt, one 1/2" hex nut
and one 7/16" standard washer into top of slotted
hole in channel assembly. Assemble one 7/16"
standard washer and one 1/2" hex nut on bottom
of 1/2“ bolt under channel assembly. See figure
10. DO NOT TIGHTEN AT THIS TIME.
2. Assemble channel assembly to hitch plates at
front of tractor as shown in figures 10 and 11.
HITCH PLATES
7/16“ WASHERS
FIGURE 10
3. Assemble keeper plates over each end of pivot
shaft with lip under hitch plates (see figurel 1) and
secure with two 1/8" (large) hsL pin cotters through
small holes near each end of shaft.
4. Adjust 1/2" X 4" stop bolt, previously assembled
into channel assembly (step 1). See figure 12.
Adjust hex nuts, above and below channel, to
provide a minimum 1/8" clearance between chan­
nel and the tractor engine pulley with the stop bolt
positioned against front axle frame member. See
figure 12.
NOTE
The stop bolt must be located so that CENTER of bolt
contacts the front axle. The stop bolt must be tight
ened in place before assembling blade assembly to
channel.
5. Hold blade head upright and guide one end of
mount rod into hole near bottom of blade mount
gusset. See figures 11 and 13. Secure with a
hairpin cotter. Slide other end of mount rod into
other blade mount gusset hole and secure with
hairpin cotter.
6. Connect curved end of spring assemblies into
spring mount ears. See figure 13. Remove plastic
cap and one 3/8" hex nut from end of each spring
assembly. Hold blade back against stop bolts and
assemble spring adjustment bolts up through bar.
Re-assemble two 3/8" hex nuts, removed earlier,
onto adjustment bolts on top side of bar. Tighten
both spring adjustment nuts approximately 1" down
from end of bolt threads, see figure 13, to provide
tension of blade against stop bolts.
7, Adjust stop bolts to tilt blade forward until 1-1/2“
distance is obtained between pivot plate and blade
assembly crossmember. See figure 13.