4 - Sprayer Setup
38
Open Centre Hydraulics
The open centre hydraulics block is necessary, if the tractor uses open centre hydraulics and/or load sensing.
Model without electrical activated boom lift
The valve is factory set for open centre hydraulics, but if closed centre
hydraulics is used (also in combination with load sensing), screw in the
valve (clockwise).
±
WARNING! Before operating the hydraulics, the valve should be
set according to the specific tractor model. If you are unsure of
the type of hydraulic system in your tractor, please contact your
tractor dealer.
±
WARNING! Always be sure to fully open or close the open/closed centre selection valve. Failure to do so may cause
damage to vital pump parts.
Load sensing hydraulics
Certain tractor models are able to use Load Sensing using an external sensing line (1/4” hose) directly from the tractor to the
boom hydraulic block. If fitted, the LS outlet on the boom hydraulic block must be restricted using an 1/4” nipple with an
0.7 mm orifice (HARDI item no. 146851).
Model with electrical activated boom lift
The valve (1) is factory set for open centre hydraulics, but if closed centre
hydraulics is used (also in combination with load sensing) then screw in
the valve (clockwise).
Certain tractor models are able to use Load Sensing without connecting
an external sensing line. But if optimal sensing control pressure cannot
be obtained, an external sensing line needs to be connected (3). Please
consult your tractor dealer for correct setup and correct connection.
Before operating the hydraulics, the valve should be adjusted according
to the specific tractor model. If you have doubt about which type of
hydraulic system your tractor is equipped with, please consult your
tractor dealer.
Combinations of settings for flow element and circuit value:
*if the tractor requires pressure relief, contact your tractor dealer for further advice.
±
WARNING! Always be sure to fully open or close the open/closed centre selection valve (1). Failure to do so may cause
damage to vital pump parts.
WARNING! It is essential that connectors on the sensing line are kept totally clean. Failure to do so may result in impurities
entering the pump and causing damage to vital pump parts.
Valve no. 123 (LS port)
Open centre Out Out Not connected
Closed centre In In Not connected
Load sensing (LS) In Out* Connected
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