Hydraulic System; Hydraulic Systems - Operating - New Holland Workmaster 50 Operator's Manual

HYDRAULIC SYSTEM

Hydraulic systems - Operating

Hydraulic Power Lift (HPL)
This is a closed-center hydraulic system, where a hy-
draulic gear pump constantly circulates hydraulic oil
through the hydraulic system. Transmission lubrication
oil is used as the hydraulic oil. The system allows the
operator to select any of the three controls (position
control, draft control, and float control).
The hydraulic Power Lift (HPL)system is operated by the
position control lever (1), draft control lever (2), see, 1 and
the response control (3), see 1.
NOTICE: Some mounted or semi-mounted equipment
may interfere with and cause damage to tractor sheet
metal. To avoid damage check for clearance between
tractor and implements.
Position control
The position control lever (1) sets the lower position of the
hydraulic lift. Position control is best for fixed-level imple-
ments that operate above the ground, such as mowers,
rakes, and sprayers. Position control keeps the equip-
ment at one position at all times, so it is not recommenced
for any ground-engaging equipment, unless the field is
very flat and the soil is very consistent.
To set the position control, move the draft control lever (2)
to its full forward position. Then set the implement position
lower by moving the position control lever, forward, or set
implement position higher by moving the lever rearward.
When operating in position control, the tractor and imple-
ment become a single unit that reacts to changing terrain
as one piece of equipment. Once you have position con-
trol set, you can raise and lower the attached implement
at the end of each pass.
You can limit the range of manual position lever operation
by moving and tightening the stop (3).
6 - WORKING OPERATIONS
6-11
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2
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3
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