Connection Of Machines And Implements To Hydraulic Outer Circuit - Zetor 8621 Forterra turbo Operator's Manual

HYDRAULIC SYSTEM
CONNECTION OF MACHINES AND IMPLEMENTS TO HYDRAULIC OUTER
CIRCUIT
Connection of machines and implements combined with more parts
Agricultural machines that are combined from more parts ( combinators, skids, and
harrows), are often equipped with outer frames which are hinged to the middle
frame. This configuration needs to control folding of outer frames. These outer
frames are folded by independent hydraulic cylinders. For folding, cylinders are
connected with outer circuit of tractor hydraulic. When working with such implement
it is necessary to control folding of outer frames by raising the control lever of outer
circuit upward. Moving the control lever upward ensures that the pressure oil in
quick-coupler "1" lifts frames to vertical (transport) position. Quick-coupler "2" is
connected with drain.
Connection of rotary hydromotor
If the rotary hydromotor is connected with hydraulic outer circuit, the oil return line
must be ever connected with quick-coupler "0".
Connection of reversible hydromotor
If the reversible hydromotor is used the oil lines must be connected with quick-
couplers "1" and "2". In this case both lines must be equipped with relief valves
which will limit the pressure peaks when stopping the machine. The oil return line
from these valves is connected with quick-coupler "0".
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