horsch Terrano 4.3 GX, Operating Instructions Manual

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Safety and responsibility | 2
60084498 • 01 • 06/2022 • en 15
2.7.5 Hydraulics
The hydraulic system is under high pressure.
The machine's hydraulics has several functions, which can cause injury to persons or
damage to the machine if operated incorrectly:
• Escaping fluid may penetrate the skin.
• Hydraulically supported machine parts may drop.
• Hydraulic components may be flung away. Pressurised hydraulic hoses may whip
about when detaching them.
Ø
Connect the hydraulic hoses to the tractor only when the hydraulics on tractor
and machine are depressurised.
Ø Lower all hydraulically lifted parts (e.g. wings, packer, undercarriage, etc.) to
the ground before performing any work on the hydraulic system. Depressurise
the hydraulics on the tractor and implement side.
Ø
The hydraulic system is under high pressure. Check all lines, hoses and screwed
connections regularly for leaks and any visible external damage!
Ø
Use only appropriate means when searching for leaks. Repair any damage im-
mediately! Oil sprays can cause burns and fire!
Ø Power sockets and connectors on the hydraulic connections should be marked
in order to exclude operating errors.
Ø
In the event of injury, consult a doctor immediately.
Ø
Secure and lock the control unit on the tractor if not in use!
Ø
Replace hydraulic hoses at the latest after six years, see Maintenance overview.
Ø
To prevent unintentional machine movements due to air trapped in the hy-
draulic cylinders these cylinders must already be filled with hydraulic oil before
installing them in the machine. The cylinder and hose assembly are then bled
by retracting and extending the cylinder several times.
Pressure accumulator The hydraulic system is equipped with pressure accumulators.
The regulations applying at the location of use during operation must be observed
to this end. The owner is solely responsible for complying with them.
Ø Do not open or work (welding, soldering, drilling) on pressure accumulators.
Even when empty, the tanks are still preloaded by gas pressure.
Ø
Maintenance and repair work on the pressure accumulator must only be car-
ried out by trained and qualified personnel.
Impact of the ambient
temperature The hydraulic system or the hydraulic oil it contains are subject to temperature-de-
pendent expansion and contraction. Changes in the temperature level (e.g. heating
of the hydraulic oil by performing hydraulically actuated work functions and sub-
sequent cooling after stopping the machine or during road travel) lead to a change
in the volume of the hydraulic oil and may thus cause movements of hydraulically
actuated components.
The effects of thermal expansion and contraction cannot be entirely avoided
through technical measures.
For this reason, minor movements of hydraulically operated functions may occur
while the hydraulic oil cools down. The respective movements occur slowly and end
after the temperature has adjusted itself. However, they may lead to enlarged ma-
chine dimensions.