Stanley MB556, Руководство пользователя

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MB556 User Manual ◄ 11
BACKHOES
With the breaker tool in place on the material to be
worked, position the backhoe so the boom is halfway up
(45°) and the dipper holds the breaker almost vertical.
Lower the loader bucket until the weight is off the front
tires.
Apply down pressure.
Figure 4. Backhoe
Apply down force to the boom/dipper until the rear of
the backhoe is raised off the ground. Rear tires and
stabilizers should be off the ground so the total rear
weight of the backhoe is on the breaker tool. The breaker
is more efficient when adequate down force is applied.
EXCAVATORS
With the breaker tool in place on the material to be
worked, position the excavator so the dipper is at
approximately 45° and the breaker is almost vertical.
The tracks of the excavator should be in line with the
boom and the breaker.
Apply down force.
Figure 5. Excavator
POSITIONING THE BREAKER TOOL ON
THE WORK MATERIAL
Position the tool bit near the edge of the work material,
not in the center or far from the edge. Position the tool
6–18 inches (depending on the material) from the edge.
Breaking off smaller pieces of rock or concrete usually
accomplishes more than trying to break larger pieces.
Break near the edge.
Figure 6. Position the Tool Bit
On flat material or rock, the breaker should be vertical
or “curled” back slightly to direct the impact force
downward and toward the backhoe. This directs the
force back toward the edge of the work material. If the
tool is positioned in the center of the work, or too far from
the edge, the energy will be absorbed into the material
without cracking it. Do not run the breaker longer than
15–20 seconds. If breakout does not occur within this
time, move the breaker to another position.
On flat material, such as concrete runways, starting to
break in the middle of the material may cause vibrations
to be transmitted throughout the breaker and excavator
because the material has no place to break to. Always
try to start at a point which will permit the material to
break out.
MAINTAIN DOWN PRESSURE
Maintaining hard contact with the surface of the material
to be broken in addition to maintaining adequate “down
force” is very important. Always keep “down pressure”
or “down force” on the point of the breaker by lifting the
wheels, tracks, or stabilizers slightly above the ground.
This method takes the “slack” out of the bracket and
boom pivots, and reduces the impact on the pivots in
the boom.
The operator needs to be constantly aware of the
OPERATION