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Adjustable hitches are single point connections that allow the hitch height to be adjusted
to suit tractor requirements.
Bolted hitches generally refer to an external supplied, pre-rated and approved hitches
which can be purchased separately or selected during the consultancy period (Note:
These may not be available on all machines). For more information contact your local
dealership or Sumo representative directly.
Fixed (1) Fixed (3) Adjustable Bolted
Standard Hydraulic Connections – Colour Code
Sumo’s colour coding is done through a
sequence of cable ties attached to the
individual hydraulic hoses, as seen in
this picture. Before connection, ensure
all connections are cleaned to reduce
the risk of contamination.
One cable tie = Return
Two cable ties = Pressure
Yellow
Orange
Blue
Red
Free-Flow Return
Damage will occur to either the fan motor seal or the oil cooler (oil coolers are only
fitted to seed & fertilizer machines) if the free-flow return hydraulic line is not
connected to the tractor first. Any movement of the fan or the coulters immediately
pressurizes the free-flow return line. This includes just lowering the machine to the
floor to allow the coulters to “take some weight”. Doing this will displace oil from the
coulter rams and pressurize the free-flow line, which may result in component
damage. When connecting the free-flow line it is necessary to observe the back-
pressure present. A gauge for this reason is provided, mounted on the fan. The
maximum return pressure is 15bar. Running with a pressure higher than this will
result in damage, so it is then necessary to take steps to relieve pressure in the free-
flow line. This is done by coupling it to the tractor via the QRC.
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