New Holland T8010 Manual page 893

Section 35 - Hydraulic Systems, 3PT - Chapter 9
ELECTRONIC HITCH CONTROL
POSITION CONTROL - In the Position Control Mode, the hitch position and movement is directly related to the
position of the control lever. The Electronic Hitch Control (EHC) monitors the position of the hitch by signals
received from a hitch position sensor on the hitch rockshaft and raises or lowers the hitch to match the signal from
the hitch position control lever sensor. The hitch will always raise at maximum speed to a height set by the operator
with the upper limit control. During lowering, the hitch moves at the speed selected by the Drop Speed Control to a
position set by the operator with the Position Control. The operator can override the Drop Rate setting when
lowering the hitch by activating the Up/Down switch to the down momentary position 2 times within 2 seconds and
holding it in the momentary position. The hitch will lower at maximum rate. In this case the hitch will lower to the
lowest possible position, even if this is below the position command.
LOAD CONTROL - In the Load Control Mode, the EHC maintains a constant draft load on the tractor's three point
hitch in changing soil conditions. When an increase in load is sensed by the lower link draft pins, the EHC will raise
the hitch until the load matches the load set by the operator with the Load Control. With a decrease in load, the
EHC will lower the hitch to a depth the operator has set with the Position Control.
SLIP LIMIT CONTROL - The Slip Limit Control Mode is available when the tractor is equipped with a True Ground
Speed (Radar) attachment. The Instrument Cluster Unit receives measurement signals from the True Ground
Speed Unit and the Wheel Speed Sensor to determine the actual slip percentage. The percent of slippage is
relayed to the EHC by way of the Data Bus. The operator can set a desired slip limit range between 5 and 40%
which the EHC compares to the actual slippage signal from the Instrument Cluster Unit and raises the hitch when
the slip limit is exceeded. When the actual slip no longer exceeds the slip limit, the hitch will lower to the position
command setting. The tractor must be travelling above 2 mph before the EHC will enter slip limit.
35-9-6