Alamo BUSH HOG RMB 1660, Operator'S Manual

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OPERATION
RMB 1660 01/22 Operation Section 4-23
© 2022 Alamo Group Inc.
OPERA
T
ION
7. BREAKAWAY
The machine is fitted with a hydraulic breakaway device which protects the structure of the machine should an
unforeseen obstacle be encountered.
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
utilized to maneuver 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.
With 'SLEW' selected:
When the slew relief valve setting is exceeded oil is
displaced from the slew cylinder allowing the arm to
pivot backwards horizontally and the obstacle to be
cleared.
Re-setting the head into the working position is done
automatically by selecting 'SLEW OUT' on the control
assembly.
Powered Slew:
The slew feature allows a 95° arc of powered arm
movement on the working side from right angles to the
tractor to 5º beyond the direct line back.
The feature is required to place the machine in the
transport position but can also be used to swing the
arm back and forth while cutting awkward areas and
corners to avoiding the need to constantly re-position
the tractor. To operate in this way, 'SLEW' must be
selected on the control assembly.
If breakaway occurs the slew motion must be reversed
to allow the slew breakaway relief valve to re seat and
the ram to become operable again.