MacDon FlexDraper FD75 - Calibrating Auto Header Height Control - New Holland CR Series

214323 281 Revision B
Table 4.2 Reel Displacement per Revolution Chart
Drive Sprocket Size
(Number of Teeth)
Driven Sprocket Size
(Number of Teeth)
Reel Displacement
Per Revolution
19 (standard)
56 769
14 (high torque / low speed)
34
56 1044
4.20.4 Calibrating Auto Header Height Control – New Holland CR Series
The auto header height control (AHHC) sensor output must be calibrated for New Holland CR Series combines (model year
2015 and later), or the AHHC feature will not work properly.
To ensure the best performance of the AHHC system, perform these procedures with the center-link set to D. When the
setup and calibration procedures are complete, adjust the center-link back to the desired header angle. For instructions,
refer to 3.7.4 Header Angle, page 78.
NOTE:
Changes may have been made to the combine controls or the display since this document was published. Refer to the
combine operator’s manual for the most up-to-date information.
DANGER
Check to be sure all bystanders have cleared the area.
Check the following conditions before starting the header calibration procedure:
• The header is attached to the combine.
• The combine is on level ground, with the header level to the ground.
• The header is on down stops, and the center-link is set to D.
• The engine is running.
• The combine is NOT moving.
• No faults have been received from Header Height Controller (HHC) module.
• The header/feeder is disengaged.
• The lateral float buttons are NOT pressed.
• The ESC key is NOT pressed.
AUTO HEADER HEIGHT CONTROL
34. Two speed kit with chain on inner sprockets.