Zetor FORTERRA 95, Operator'S Manual

Page: 88 / 197

88
HYDRAULIC SYSTEM
CONNECTING MACHINES AND IMPLEMENTS TO THE OUTER HYDRAULIC
CIRCUIT
Connecting machines and implements consisting of more parts
During work with agricultural machines that consist of more parts (combinators, skids,
harrows) and that have side frames hat are hinged to the central frame and during
transport are folded to the vertical position by separate hydraulic cylinders controlled
by the outer hydraulic circuit of the tractor, the folding of the side frames must always
be controlled by the upward (backward) movement of the auxiliary distributor lever.
The “lifting” branches of the cylinders must be connected to quick-couplers “2”, “4” or
“6”.
Connecting a rotational hydraulic motor
If a rotational hydraulic motor is connected to an outer outlet of the hydraulic system,
its return branch must always be connected to quick-coupler “0”. In case of connec-
tion of the filling (pressure) branch to quick-coupler 1 or 2 the hydraulic motor is pro-
tected by the kick-out function against overloading. This function interrupts the opera-
tion of the hydraulic motor at the pressure value in the filling branch of 17.5 - 1.6
MPa.
Connecting a reversing hydraulic motor
A reversing rotary hydraulic motor must be connected to quick-couplers “1” and “2”
for functional reasons. However, relief valves must be inserted in both the branches
in this case as they can reliably limit the pressure peaks during the stopping of the
machine. The oil return lines from these valves are connected to quick-coupler "0".