Zetor PROXIMA PLUS 90 2012, Operator'S Manual

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103
HYDRAULIC SYSTEM
CONNECTING MACHINERY AND TOOLS TO OUTER HYDRAULIC CIRCUIT
Connecting a double acting cylinder
A double acting cylinder must always be connected to quick couplers of one section.
Connecting machinery and tools assembled from more parts
When working with agriculture machinery which is assembled from more parts (combinators, scrubbers, or harrows) where the
edge frame is hinged to the central frame because it is diagonally folded during transport by independent hydraulic cylinders
which are controlled by outer hydraulic circuit of the tractor, it is recommended to connect the lifting arms of the cylinders to quick
couplers (3) and (5) which are equipped with a one-way valve.
Connecting rotary hydraulic engine
If a hydraulic engine is connected to outer hydraulic drive, it is always necessary to connect its returnable arm to quick coupler
(0). Filling (pressure) arm can be connected to quick couplers (1) or (2), where the hydraulic engine is protected by the “kick-out”
function from overload. This function stops the hydraulic engine if pressure in the filling arm exceeds 17 MPa.
Connecting reverse rotary hydraulic engine
Due to its function, reverse rotary hydraulic engine must be connected to quick couplers of one section. It is recommended to use
quick couplers (1) and (2), where the hydraulic engine is protected by the “kick-out” function from overload. This function stops
the hydraulic engine if pressure in the filling arm exceeds 17 MPa. If the hydraulic engine is connected to quick couplers of
different sections, both arms must be equipped with safety valves which can be relied on to restrict high pressure peaks during
run-out. Connect the safety valves drain to quick coupler (0).
Connecting external hydraulic distributor
It is recommend to connect external hydraulic distributor to quick couplers (4) or (6). Control levers (b) and (c) are mechanically
locked in these positions without hydraulic lock.
Connectable machinery which makes use of oil in outer hydraulic circuit must be filled with the same kind of oil
as recommended for tractor gearbox!
Quick coupler sockets of connectable machinery must be cleaned properly before connecting.