MSD 7R SHEARS
Page 4 Section 4
Operation
GETTING THE FEEL OF THE
SHEAR
Every operating part of any machine has a slightly
different “operating feel”—an individual machine
response to the movement of the controls. Before
starting the fi rst job with a new machine, it is
suggested that the operator fi nd an open spot on
fi rm, level ground that’s free of obstructions such as
trees, buildings and other equipment. This area must
be free of people, too. Move the machine to this
area – and spend some time just getting to know
the “operating feel” of the machine and the shear,
which will allow the operator to become familiar with
the control levers and the shear before beginning
work.
The machine is extremely powerful. Do not operate
it carelessly; there is potential for personal injury
and equipment damage. Be concerned about
safety when preparing to operate the new machine.
Ensure safe operation by inspecting the machine as
stated in
Getting Started Safely.
This inspection
amounts to a common sense visual check of
the machine at the beginning of every operation.
Follow a preventive maintenance program; such
a procedure will reduce the possibility of costly
downtime. Read the
Getting Started Safely
section
of this manual and understand it.
The “fl uid” nature of hydraulic power requires a
special operating approach to the shear that can be
described as a smooth, even technique. The control
levers should be moved in a gradual, deliberate way
rather than with jerky, abrupt movements. Jerky
operation can cause damage and early wear to
various parts on the machine, and can also overheat
the hydraulic system.
For example, as each control lever is moved forward
or backward from the center, or neutral position,
the oil fl ows to the cylinder or motor controlling a
function. The component (boom, attachment, etc.)
starts to move. The component moves faster as the
control lever is moved further forward or backward.
Holding the lever in the forward or backward position
will hold that movement at a given rate of speed. To
slow the movement down, gradually move the lever
toward the neutral position. Movement is stopped at
the neutral position. The position is maintained until
the control lever is moved again.
FEATHERING THE CONTROLS
Feathering the controls is a technique that will
increase output and make operating the shear easier.
When starting any motion of the machine, move the
control slightly from neutral until it starts to move,
then smoothly move the control to increase motion
to desired speed. Do the same when stopping a
motion.
FIGURE 4-1
