New Holland CX720 Operator's Manual page 306

Upper and Lower sieve
•
Adjust the openings of the upper and lower sieve,
according to the grain size, with the levers at the rear
of the sieves or electrical (if installed) with switches
1 or 2 from the operator's platform.
A "pop-up" screen appears on the InfoViewt monitor
when changing the sieve settings.
NOTE: To prevent damage on the sieves when
closing the sieves, they open first 5 mm, afterwards
they close to the selected value.
The upper and lower sieve(s) are equipped with a
sieve opening indicator 3.
The rear part (extension) of the upper sieve
(HC 1-1/8") can be adjusted separately. It may be
necessary for the rear part to be opened a few
millimetres more than the sieve opening to prevent
loss of the returns, particularly when harvesting
wheat.
When harvesting maize, keep the upper sieve
(HC 1-5/8") closed as much as possible to sieve all
the grain and to prevent the maize cobs from passing
through the sieve and entering the grain tank.
IMPORTANT: On the CX800 models the upper and
lower sieve consists of two sieve halves. It is
important that the both sieves (left and right) has the
same opening. To adjust the left and right-hand sieve
halves (upper and lower sieve) and to obtain the
same opening, refer to SECTION 4 - "LUBRICATION
AND MAINTENANCE", paragraph: "Cleaning".
NOTE: It is also possible to adjust the sieves at the
rear. Two rocker switches are located at the inside of
the straw hood (left-hand side) to adjust the lower
sieve (switch 2) and upper sieve (switch 1).
SECTION 3 – FIELD AND SITE OPERATION
102
103
104
3–63