New Holland CX720 Operator's Manual page 311

3. Move slowly lever 2 (open/close) on the presieve
until the presieve falls completely into his place.
4. If ok, insert and tighten two bolts 5 on both sides
of the presieve.
5. Check by moving the lever 1 at the back of the
shaker shoe.
NOTE: Moving lever 1 will cause the presieve to open
or close.
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