Section 3
OPERATION
3-21
785 Motor Grader
2. Push lever for left articulation.
NOTE: Amount of articulation is displayed on
the Articulation gauge (2, Figure 3-3).
Leaning Wheel Lever
The Leaning Wheel lever (9, Figure 3-5) is used to
set the amount of wheel lean.
1. Pull lever to lean wheels right.
2. Push lever to lean wheel left.
Scarifer Lever
The Scarifer lever (2, Figure 3-5) is used to raise or
lower the Scarifer.
1. Pull lever to lift Scarifier.
2. Push lever to lower Scarifer.
Differential Lock Switch
NOTE: The differential lock is used when
conditions require maximum traction.
The Differential Lock switch (9, Figure 3-6) is used
to help with traction. When the switch is set to the
ON (up) position the differential lock is engaged.
The differential lock can be locked or release while
grader is in motion. Releasing the differential lock
will allow shorter turns.
Moving Blade to Bank Position
The following procedure is for moving blade to the
right. Use opposite functions to move to the left.
1. Position the circle slightly to the right of center.
2. Shift blade right.
3. Lower blade to ground.
4. Set blades to the float position.
5. Disengage lift arm locking pin.
6. Retract left lift cylinder and circle side shift
cylinder and extend right lift cylinder to rotate
lift arms.
7. Align lift arm indicator with desired locking
position and engage locking pin.
8. Use lift cylinders and circle side shift cylinder to
lift blade off ground (4 - 5 in. [100 - 125 mm]).
9. Rotate blade counterclockwise to put right end
of blade forward.
10. Retract right lift cylinder, extend left lift cylinder,
rotate circle, adjust circle side shift cylinder and
pitch, and side shift blade to obtain desired
position.
11. Follow steps in reverse order to move blade out
of the bank position.
Steering
The grader is steered using the steering wheel (12,
Figure 3-5). The machine can be steered in the
straight frame or articulated position. The straight
frame position is most often used for long runs. The
articulated position shortens turns and also can be
used to counteract the side thrust in normal
grading.
Blade Side Thrust
When a load is being pushed, the front of the
grader tends to swing toward the toe of the blade.
This can be counteracted as follows:
1. Articulate machine toward the toe of the blade.
2. Lean top of front wheels toward heel
(discharge side) of blade.
Blade Pitch Adjustment
Use the upright position of the Moldboard for
normal grading. Position the blade so that the top
edge is vertical or slightly ahead of bottom edge.
This places the cutting edge at the best cutting
angle.
Use a backward pitch of the Moldboard for greater
cutting ability. This will cause the cutting edge to
dig in.
NOTE: Dirt may build up and pile into circle
due to decreased rolling action. Adjust
position as required.
For better mixing and rolling action, pitch
Moldboard ahead of vertical position. When
spreading material moldboard should be tipped
further forward. This helps compact material and fill
low spots. Use only as much forward tilt as
necessary for the job.
Pile Spreading
1. Set moldboard at right angles to the direction
of travel and shift the moldboard toward pile.
2. Tilt blade slightly forward.
3. Raise blade for the desired depth.
4. Shift circle toward pile.
5. Lean front wheels slightly away from pile.
NOTE: The material spread in each pass will
be limited by the power and traction of
the grader.
Courtesy of Machine.Market
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