MASSEY FERGUSON 7200 ACTIVA BROCHURE 176-275, Брошюра, Страница: 8 / 32

08
Achieving the best
possible sample
One of critical factors in the harvesting process is to maintain a
consistently good grain sample. Massey Ferguson’s threshing,
separation and cleaning system helps to ensure this goal is
achieved – in all harvesting conditions.
Grain pan
The motion of the pan ensures the
grain stays at the bottom with the
lighter material and chaff remaining
at the top. The grain pan is the
same width as the threshing drum
for maximum output while the
high longitudinal dividers ensure
an even feed from the pan to the
sieves in sloping conditions.
Sieves
High Capacity Sieves (HC Sieves)
move in opposite directions and
deliver an optimum airflow with
high adjustment tolerance at
the same time. In dry conditions
particularly, and when the straw
is short and dry, the sieves still
produce the best possible grain
sample at high capacity. High
separators on the top and bottom
sieves maintain an even layer of
material – even when working
on slopes.
Fan
The powerful fan has three inlets –
one on each side and another on
the top – distributing airflow over
the complete width for maximum
efficiency. It can be adjusted from
the cab between 350 and
1050 rpm and there’s the option
for running the fan at lower
speeds in the 270-840 rpm
range for lighter crops.
A choice of 5 or 6 Straw Walkers
for efficient separation
Long, durable straw walkers
are hot-dip galvanised for high
separation performance and long
life. Each one features four
210 mm-high ‘active steps’
with 150 mm travel and extra large
vents for efficient thinning out of
the straw mat.
Thicker metal is used for the front
steps to deal with the flow of straw
coming from the Active Beater
Concave (ABC) module, while the
fully-welded walkers are of closed
bottom design, ensuring great
strength of construction, improved
reliability and an even feed of the
grain pan.