LeeBoy 685D - Grading an S Curve Shoulder; Road Maintenance

Figure 4-54. Bank Cutting
Bank Cutting
1. Make a rst pass at base of bank to level and
smooth a platform for the machine.
2. Tilt the moldboard slightly forward and sharply
angle the moldboard so the heel is in the opposite
direction of the bank you’re cutting. (You can
articulate slightly if more reach is needed.)
3. After making the bank cut, make a second pass with
the moldboard less angled but tilted more forward
to clean any loose material from the bottom of the
bank.
Grading an “S” Curve Shoulder
1. Slowly approach the rst curve.
2. Lean the front wheels slightly toward the opposite
direction of the curve to counteract side thrust.
• Push the lever forward to lean the wheels left.
• Pull the lever back to lean the wheels right.
3. Position the toe of the moldboard behind and
outside the front wheel closest to the edge of the
shoulder (in the opposite direction of the wheel
lean).
4. As you straighten the grader when nishing the
curve, return wheels to their normal position.
5. Slowly approach the second curve and repeat
Steps 2 - 4.
NOTE: If a windrow has been created while grading,
make a “clean-up” pass and reshape the
shoulder if necessary.
Figure 4-55. Road Maintenance
ROAD MAINTENANCE
Much of a grader’s road maintenance work involves
smoothing, shaping the travel surface and providing
drainage to prevent road deterioration.
Begin road maintenance work by tipping the top of
the moldboard approximately two inches ahead of the
cutting edge, then adjust to the material conditions.
Maintaining the material rolling action across the
moldboard blade reduces the horsepower required and
provides maximum productivity.
• The most important factor in road maintenance
grading is providing and maintaining a good drainage
system. Drainage of water from the road surface to a
ditch, even a minimal ditch, helps maintain good road
conditions longer.
• Remember that tipping the moldboard forwards or
backwards changes the depth of cut across the entire
moldboard. The best time to reshape earth and gravel
roads is after it’s rained. Dry roads should be sprayed
with water before grading for easy compaction and to
minimize dust while working.
• Articulating the rear frame toward the tow of the
moldboard 2 - 5 degrees helps reduce the motor
grader’s tendency to bounce.
• Keep the turntable circle clean. Material buildup may
increase wear and prevent smooth material rolling
action, reducing productivity.
4
Operation
LeeBoy 685D Motor Grader 4-33