New Holland WorkMaster 50 Service Manual page 454

Hydraulic hand control - Overview
This is a live hydraulic system, where gear type hydraulic
pump is mounted directly to timing case. transmission
lubrication oil is used also as hydraulic oil. This system
described here mechanically senses changes in the draft
loading via the top link of the three point linkage. The
system allows the operator to select position control, draft
control, mixed control and float.
CAUTION
Hydraulic filter is to be changed at regular intervals as
recommended. Hydraulic and transmission parts may
get damaged if filter is choked. Always use genuine
NEW HOLLAND filters.
The system is operated by position control lever (1), draft
control lever (2), and response control (3).
NOTE: 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 operation
Position control provides accurate control of implements
such as sprayers, rakes, rotary tillers, etc. that operate
above the ground. Once set, position control will maintain
the selected implement height.
NOTE: Always set the system to position control at any
time when not actually operating in draft control, such
as when attaching or transporting equipment or when no
equipment is attached.
Move the draft control lever (1) fully forward in the quad-
rant. Set the required implement height/depth using the
position control lever (2). Pull the lever back to raise
the implement, push forward to lower. Implement height/
depth is relative to the position of the lever in quadrant.
An adjustable stop (3) is provided to enable the lever to
be returned to the required working position.
Hydraulic systems - Hydraulic hand control
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