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Lateral Tilt Flow Control Adjustment
For JH7020 & JH9020 Leveling Systems the
lateral tilt flow control valve adjusts the speed
at which the header rotates. The header should
rotate at the chassis' rotation rate.
speed is a compromise between manual tilt
mode and automatic tilt mode. The rotation rate
is set at the factory; however with larger header
configurations it may be necessary to adjust the
header's rotational rate.
To test the header rotation rate, push the tilt
button to the left until the tilt frame is rotated
to the left limit. Push the tilt button to the right
until the tilt frame reaches its right limit. The
cycle time should meet the specification of 22
seconds.
Specification
Left-to-Right Cycle Time-22 seconds
If the cycle time is shorter than the specification,
turn the flow control set screw clockwise a
quarter turn at a time until the cycle time meets
the specification.
If the cycle time is longer
than the specification, turn the flow control
screw counterclockwise a quarter turn at a time
until the cycle time meets the specification.
This specification ensures that tilt speed is
adequate for manual operation.
header configurations this tilt speed may cause
the automatic mode to be unstable.
recommends adjusting the Contour Master's
sensitivity until it becomes stable. Refer to the
combine's operators manual for Contour Master
adjustments.
For changing the header tilt speed on a JH9020
Leveling System with factory Contour Master
consult the John Deere Operator's Manual.
D-180215CMA01C
The tilt
With some
22 second rotation time from one side to other
Hillco
Notice
Hillco Technologies, Inc.
46
A
B
Located Below the Cab
A - Relief Ports
B - Flow Control
The pressure relief valve is pre-
set at the factory.
the setting may cause damage
to the tilt frame or hydraulic
system. However, in very large
header configurations, it may be
necessary to change the setting.
Contact your dealer to reset the
relief valve.
A
Changing
Sept. 2022
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