KUHN GMD4410, Руководство оператора

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8. - Instructions for work
GMD4410
55
KN045MGB G
Disc mower
8.2.2 Ground pressure

To check the ground pressure
The ground pressure adjustment determins the
safety breakback adjustment:
• Example: when the pressure in the
gauges increases, the mowing unit
ground pressure decreases and the
breakback force increases.
The mowing unit suspension is obtained by a hydro-
pneumatic accumulator. By modifying the pressure
in the accumulators, the mowing unit ground
pressure is altered.
The hydro-pneumatic accumulator system also
operates the "safety breakback " function.
In case an obstacle is struck:
• The suspension pressure increases in order to
decrease the ground pressure.
• The mowing unit can pivot up to 25° to the rear.
• Once the obstacle is passed, the mowing unit
automatically regains its initial position.
In case an obstacle has been struck, check
that the mowing unit has not been damaged.
- Place the machine in working position.
-
Check that the chassis height is correct:
H = 600 mm (2’).
- Check the pressure given on the gauge:
• NORMAL operating pressure = 125 bar
(1813 psi).
• MINIMUM operating pressure = 118 bar
(1711 psi).
• MAXIMUM operating pressure = 140 bar
(2031 psi).
The pressure must be adapted to the nature and
moisture degree of the ground.
Never adjust machine to a pressure not
comprized between these limit values.