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doble - maxi doble
4.5 HYDRAULIC CIRCUIT
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various components of the implement to operate.
KEY Fig.12
MAXIMUM PRESSURE 180 Bar
1/4” AND 3/8” HYDRAULIC PIPES
A) Hydraulic cylinders to control steerage hoe
B) Hydraulic cylinders to regulate rollers
C) Hydraulic cylinder to hitch/unhitch steerage hoe
D) Control cylinder speed adjuster valve
E) Floating valve
F) Flow divider
G) Sequence valve
H) Safety valve
I ) Locking valve
1) Harrow closing/harrow hitching oil pipe
2) Harrow opening/harrow unhitching oil pipe
3) Roller lowering oil pipe
4) Roller lifting pipe
4.6 HOEING UNIT OPENING/CLOSING
The two hoeing units are respectively opened during the work phase and closed when the machine is transported on the roads
by a hydraulic control with two cylinders (16 Fig. 1 and 4 Fig. 8). Both hydraulic cylinders are equipped with locking valves (17 Fig.
1). If a hydraulic pipe suddenly bursts, these valves instantly stop the oil
and, consequently, the machine in the position to
which it has set. The cylinders also have a
valve that regulates the opening and closing speeds of the hoeing units (D Fig. 12).
These valves are calibrated so that the movement of the cylinders and, thus, the lowering and lifting movements of the hoeing
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of the
governor valve until the two side hoeing units lift and lower in the desired way. After this, lock the valve in position
with the ring nut in the governor valve.
WARNING
When the hoeing units are in the vertical position, check the rear visibility from the driving seat in the tractor as it could be
obstructed with the hoeing units in this condition. In this case, you are advised to mount one or more rear view mirrors on
the tractor in order to ensure unobstructed visibility.
Summary of Contents for DOBLE
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