MAC215990
189
Revision A
3.10.6
New Holland CR and CX Series Combines
–
2014 and Earlier
To make your header
’
s auto header height control (AHHC) system compatible with New Holland CR/CX Series combines,
you must set your combine
’
s header configuration options for the particular model of header, configure the reel speed
settings, set up the AHHC controls, and calibrate the AHHC system to ensure that it is working correctly.
This section applies only to pre-model year 2015 New Holland CR/CX models.
Checking Voltage Range from Combine Cab
–
New Holland CR and CX Series
The auto header height control (AHHC) sensor needs to operate in a specific voltage range in order to work properly.
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.
NOTE:
For New Holland CR models 6.80, 6.90, 7.90, 8.90, 9.90, and 10.90, refer to
DANGER
Ensure that all bystanders have cleared the area.
1.
Position the header 254
–
356 mm (10
–
14 in.) above the ground.
2.
Unlock the float.
1031911
A
Figure 3.227: Float Lock
3.
Check that the float lock linkage is on the down stops
(washer [A] cannot be moved) at both locations.
NOTE:
If the header is not on the down stops during the next two
steps, the voltage may go out of range during operation
causing a malfunction of the AHHC system. If the header is
not on the down stops, refer to
for instructions.
