MacDon FD75 OM - Manual (Page 98)

OPERATION
Adjusting the Header Raise/Lower Rate (Gleaner R65/R75)
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.
Header height control system stability is affected by
hydraulic flow rates. Ensure that the header raise (A) and
lower (B) adjustable restrictors in the hydraulic valve are
adjusted so 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.
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 4.91: Header Raise and Lower
Adjustable Restrictors
Adjusting Ground Pressure (Gleaner R65/R75)
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.
169894 84 Revision A