New Holland T4.105F, Operator'S Manual

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6 - WORKING OPERATIONS
REAR HYDRAULIC LIFT
Hydraulic lift with mechanical control
The hydraulic lift system uses the transmission oil, which
is supplied by a gear pump driven by the engine timing
gears.
Operating Remote
MOIL13TR01423AA
1
1. Position control lever
2. Draft control lever
With the manually-operated hydraulic lift, there can be the
following operating conditions.
Position control
Move draft control lever (2) fully forward.
Set the position of the implement, either in or above the
ground surface, move the lever
(1) forward to lower the
implement and backward to raise it. The movement of
the implement will be proportional to the movement of the
lever.
To raise and lower the implement at the headland or when
necessary, use the lever
(1) , do not change the position
of the lever (2) . When the implement is lowered, to restart
work move the lever into the previous position to work with
the same settings.
Draft control
Move position control lever (1) fully forward;
Set the desired implement depth in the ground by gradu-
ally shifting the draft control lever
(2) forwards. The depth
reached by the implement is proportional to the traction
power which, in turn, is determined by the firmness of
the ground. In these conditions, the lift will automatically
maintain the traction power required from the tractor at a
constant level.
To raise and lower the implement at the headland or when
necessary, use the lever
(1) , do not change the position
of the lever (2) . When the implement is lowered, to restart
work move the lever into the previous position to work with
the same settings.
Float function
To operate the lift in float mode, i.e. with free movement
of the arms for their full travel, move both levers
(1) and
(2) fully forward;
The lift should only be used to raise and lower the imple-
ment at the headland; to do this, operate only on lever
(1) .
Mixed position and draft control
Set the desired implement depth in the ground and find
the working depth required, as described for draft control.
When the implement is set at the desired depth, gradually
shift the position control lever
(1) backwards, until the lift
arms start to rise.
Move the lever into the previous position to work with the
same settings.
The lift operates in draft control but, at the same time, pre-
vents the implement from going too deep if less ground
resistance is encountered, which could result in unsuit-
able soil being brought to the surface.
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