Tractor Hydraulics; Hydraulic Power Lift (Hpl) (3 Pt); Position Control - Shibaura ST450 Operator's Manual

SECTION 2 – OPERATION

TRACTOR HYDRAULICS

HYDRAULIC POWER LIFT (HPL) (3 PT)

The HPL lever (1) in Figure 2-46, is located on
the right-hand control pod. The lever controls the
position of the two lift arms.
To lower the lift arms, first make sure the drop
rate control valve (3) in Figure 2-47 is open, then
move the HPL lever forward. To raise the lift arms,
move the lever rearward. An adjustable stop (2)
in Figure 2-46, is located in this quadrant for
returning the lever to a preset position
The hydraulic lift system provides accurate,
smooth, and instant hydraulic power for raising a
Figure 2-46
variety of compatible equipment whenever the
engine is running. The system's position control
feature maintains the selected height or depth of
three-point linkage equipment in relation to the
tractor. When the hydraulic lift control lever is
moved to a higher or lower setting in the quadrant,
the system repositions the equipment to a higher
or lower position and maintains the selected
position.
The hydraulic lift system may be equipped with
optional draft control.
3
WARNING
Make sure the area is clear of people before
lifting or lowering equipment.
Figure 2-47
Always lower the hydraulic lift and other
hydraulic equipment before stopping and
leaving the tractor.

POSITION CONTROL

Position control provides easy, accurate control
of three-point linkage equipment which operates
above the ground, such as sprayers, rakes,
mowers, etc. It also provides uniform depth when
using a blade or similar equipment on ground
level.
When operating in position control, there is a
definite relationship between the position of the
control lever in the quadrant and the position of
the equipment. The lever (1) in Figure 2-48, must
be moved to change the position of the
Figure 2-48
equipment relative to the tractor. The system will
automatically maintain the equipment in the
selected position.
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