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Revision A
Calibrating the Auto Header Height Control
–
Gleaner R65/R66/R75/R76 and Pre-2016 S Series
Calibration should be done on flat, level ground without the header clutches engaged. Header height and header tilt must
not be in auto or standby modes. The engine rpm must be above 2000 rpm. The header tilt option on 2004 and earlier
model combines does not work with MacDon headers. This system will have to be removed and disabled in order to
calibrate the auto header height control (AHHC). For instructions, refer to the combine operator
’
s manual.
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.
NOTE:
If header float is set too light, it can prevent calibration of AHHC. You may need to set the float heavier for calibration
procedure so header doesn
’
t separate from the float module.
Figure 9.205: Combine Auto Header Height Controls
1003586
A
B
C
D
E
F
G
A - AUTO MODE Button
B - AHHC Light
C - CAL1 Button
D - Raise Header
E - Lower Header
F - AUTO Mode
G - CAL2 Button
NOTE:
For best performance of the auto header height control (AHHC), perform these procedures with the center-link set to
D
.
When setup and calibration are complete, adjust the center-link back to desired header angle. For instructions, refer to
Header Angle in the header operator
’
s manual for instructions.
1.
Ensure center-link is set to
D
.
2.
Press AUTO MODE button (A) until AHHC light (B) is illuminated.
3.
Press and hold CAL1 button (C) until you see the following lights flash: raise header (D), lower header (E), tilt auto
mode (F), and AHHC (B).
4.
Fully lower the header, and continue to hold the HEADER LOWER button for 5
–
8 seconds to ensure float module has
separated from header.