27
BREAKAWAY
NOTE:
The breakaway function does not relieve the operator of his
responsibility to drive carefully, be alert and AVOID OBVIOUS
HAZARDS BEFORE CONTACT OCCURS.
Breakaway may occur momentarily during normal work should an
extra thick or dense patch of vegetation be encountered. In these
instances tractor forward motion may be maintained with care.
Where breakaway has occurred as a result of contacting a post or tree
etc. the tractor must be halted and the controls of the machine utilised
to manoeuvre the head away from the obstacle.
NEVER CONTINUE
FORWARD MOTION TO DRAG THE HEAD AROUND
THE OBSTACLE IN BREAKBACK POSITION.
NOTE:
The force required to activate the breakaway system will vary
dependent upon the gradient of work. It will require less force
when working uphill and vice versa.
On mid-cut machines the geometry of the breakaway will cause the
head to initially move outwards in addition to rearwards. Therefore be
aware that the breakaway action will be impeded if the outer end of the
head is working against a steep bank. In this circumstance extra care
must be taken during operation to avoid this occurrence.
Breakaway occurs at the slew column pivot. When an obstacle is
encountered continued forward motion causes the pressure in the slew
ram base to rise until the relief valve setting is exceeded.
With 'AUTO RESET' selected:
When the slew relief valve
setting is exceeded oil is
displaced from the slew ram
into the base of the lift ram
which causes the head to
rise as the arm pivots
backwards
to
clear
the
obstruction.
Resetting of the head into
the work position occurs
automatically.
With 'SLEW' selected:
When the slew relief valve
setting is exceeded oil is
displaced from the slew ram
allowing the arm to pivot
backwards horizontally and
the obstacle to be cleared.
Re-setting the head into the
work position is carried out
manually by selecting 'SLEW
OUT'
on
the
control
assembly
