The auto header height control (AHHC) system’s stability
is affected by hydraulic
fl
ow rates. Ensure that the header
raise (A) and header lower (B) adjustable restrictors in
the hydraulic valve block are adjusted so that it takes
approximately six seconds to raise the header from
ground level to maximum height (hydraulic cylinders fully
extended), and approximately six seconds to lower the
header from maximum height to ground level.
If there is too much header movement (for example,
hunting) when the header is on the ground, adjust the
lower rate to a slower rate of drop: seven or eight seconds.
NOTE:
Make this adjustment with the hydraulic system at normal
operating temperature (130°F [54.4°C]) and the engine
running at full throttle.
Figure 3.193: Header Raise and Lower
Adjustable Restrictors
Adjusting Ground Pressure (Gleaner R65/R66/R75/R76 and S Series)
NOTE:
Changes may have been made to the combine controls or display since this document was published. Refer to
the combine operator’s manual for updates.
To adjust header height, ensure the header is in auto
header height control (AHHC) mode. This is indicated by
the AUTO MODE LED light (A) displaying a continuous,
solid light. The header will lower to the height (ground
pressure) corresponding to the position selected with the
height control knob (B).
Turn the knob counterclockwise for minimum ground
pressure, and clockwise for maximum ground pressure.
Figure 3.194: AHHC Console
147831
137
Revision A
Summary of Contents for FlexDraper FD1 Series
Page 2: ...FD1 Series FlexDraper Header for Combines Published April 2016 ...
Page 3: ...Declaration of Conformity 147831 i Revision A ...
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