New Holland CX720 Repair Manual page 3724

CROP PROCESSING - CLEANING Primary cleaning
All components that make up the cleaning shoe are connected to the frame. The frame attaches to the combine at the
front through a pivot pin in the center. The rear of the frame rests on a sealed roller bearing mounted to the combine.
Plastic rollers at the back corners, hold the lateral position of the frame inside the combine while allowing the cleaning
shoe assembly to rotate.
The Grain Pan (2).
The grain pan is forward of the upper cleaning shoe. The front of the pan attaches to the cleaning shoe frame with
two support arms. The arms provide a semi-ridged connection to the shoe frame enabling the grain pan to move back
and forth during normal operation of the system. The rear of the grain pan is connected to the upper cleaning shoe.
An adjustment is provided on the right side of the pan allowing the shoe and the pan to be set square with each other.
The Upper Cleaning Shoe (3).
The upper cleaning shoe is attached at the front with drive arms, and at the rear with two support arms. Three sieves
are secured to the upper shoe. A lever at the right rear corner manually positions the pre-sieve, mounted on the front
part of the shoe. The two remaining sieves may be positioned remotely from the cab (optional) and are mounted
side-by-side on the back portion of the upper shoe. A rocker arm connects the upper and lower shoe to move them
in opposite directions during normal operation.
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The Lower Cleaning Shoe (4).
The lower cleaning shoe is connected to the frame and upper cleaning shoe at the front with the rocker arm. Two
support arms fasten the lower shoe to the frame while allowing back and forth motion as the shoe is driven by the
rocker arm. Two sieves are mounted side-by-side on the lower shoe and positioned remotely from the cab (optional).
The Drive Arm (5).
The rotating cams of the eccentric shaft move the drive arms in a back and forth motion. Two drive arms attach the
upper cleaning shoe to the eccentric shaft on both sides of the combine. The neutral position of the shoe assembly
is obtained by setting the keyway of the eccentric shaft perpendicular to the drive arm. Anytime a rubber bushing is
replaced, the arm must be in the neutral position prior to tightening the clamp.
The Rocker Arm (6).
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