LeeBoy 685D - Cul-De-Sacs

1. Begin a ditch by establishing a marking cut.
• Pitch the moldboard forward halfway until top
of the moldboard is in line with the center of
the front tire, raising the heel just ahead of rear
wheels (so dirt spills between the rear tires).
• Rotate the moldboard so the toe is just behind
the outside edge of the right front wheel (about a
45-degree angle).
• Lean wheels toward the discharge end (heel) of
the moldboard.
• Make the rst cut light to establish the line of the
ditch.
2. Move the grader forward. As the front wheel
passes over the starting point of the ditch, lower
the moldboard toe, applying enough pressure to
penetrate the grounds surface 3-4 inches (7.6 - 10
cm).
3. On the second pass, position the wheels in the
ditch made by the rst pass to compensate for side
thrust and make a deeper cut. You can increase
speed on the second pass and apply as much down
pressure on the moldboard toe as the grader can
handle.
4. Continue along the ditch line until reaching the
nishing point.
NOTE: When making ditch cuts, windrows form
between the heel of the blade and the rear
wheel. Move or level these windrows when
either the ditch is at the planned depth or
the windrow becomes higher than the road
clearance of the grader. You can use this
material for the road shoulder.
5. As dirt builds up between rear tires, make a clean-
up pass, pushing material toward the road edge:
• Side-shift the moldboard blade toward the ditch
with front wheels positioned outside the windrow.
• Angle the moldboard heel between rear wheels
and pitch the moldboard blade slightly forward.
Be sure the moldboard toe is well beyond the
windrow to minimize spillage back into the ditch.
• Articulate the grader slightly to deposition
windrow between the rear tires if needed.
• Feather the material by raising and tilting the
moldboard blade slightly forward until all the
material passes under it.
6. Establish the road shoulder by sliding the
moldboard blade farther out, rotated to a 90-degree
angle (perpendicular with the frame), and tilted
slightly forward. Apply only enough downward
pressure to clean-up the ditch and skim the material
smoothly across the road shoulder.
Cul-De-Sacs
Articulating the grader helps when grading cul-de-
sacs. Articulate the rear frame away from the curb (or
cul-de-sac radius), being careful not to articulate too
fast, and lean the wheels to keep the moldboard toe
position to the curb (or cul-de-sac radius). Remember
the center line crown extends all the way to the center
of the cul-de-sac, so do not straddle the crown or grade
perpendicular to the cul-de-sac entrance.
1. Angle the moldboard about 30 degrees and tilt
forward 5 - 10 degrees, keeping the toe toward
the outside cul-de-sac radius. Start grading at the
perimeter of the cul-de-sac in a circular pattern,
working material toward the center as you go.
2. To begin nishing the cul-de-sac, drive grader in the
opposite direction at the outside edge, forming a
windrow toward the center.
3. Tilt moldboard forward slightly and move windrows
toward the center of the cul-de-sac, checking the
slope as you grade.
4. When you have nished pushing all the excess
material to the center, straighten the moldboard
(parallel to the front axle) and push the excess
material out of the cul-de-sac entrance.
Operation
LeeBoy 685D Motor Grader4-36