STEERING SYSTEM INSTALLATION | CRX + SC1 | RAVEN EUROPE GENERIC
PAGE 19/36 | Installation manual | 016-8000-014EN | Rev. A1
1.3.6
HYDRAULIC SYSTEM ON TRACTORS WITH
GEAR PUMP AND LOAD SENSE ORBITROL
CONNECTION
Tractors with a gear-type pump and equipped with an
orbitrol with load sense connection fitted with a load
sense priority valve. This concerns most Valtra models
(Advanced, Versu and Direct) and some Deutz-Fahr
models.
This enables the use of a standard load sense manifold
with a shuttle valve. Because the maximum pressure is
normally limited by the steering orbitrol, an additional
pressure relief valve needs to be installed in the
pressure line to the manifold.
The load sense signal should be connected to the
existing load sense line from the steering orbitrol by
using the shuttle valve supplied. Preferably mount the
shuttle valve horizontally. Connect the hydraulics
hoses as indicated in Figure 13.
Determine the maximum pressure of the steering
system before mounting the manifold. The maximum
pressure of the additional pressure relief valve should
be set equal to the maximum pressure of the steering
system, before mounting the manifold.
Pressure relief
valve
(p=140 bar)
T
P P
Shuttle
valve
Orbit
LS A1 B1
T
P A B
T
P
LS
-prior
Steering cylinder(s)
Manifold
FIGURE 13 CONNECTING CIRCUIT FOR LS PRIORITY
VALVE.
