NOREMAT Optima 51 - Page 20

Operator’s manual
Optima 51 / M51 / M56 / M57T / 60T
20
Dynapôle Ludres/Fléville, 166 rue Ampère/BP 60093 - 54714 LUDRES - FRANCE - Tél.+33 (0)3 83 25 69 60 - Fax. +33 (0)3 83 26 12 85
Technical characteristics
2 7Dual-Pressure‘breakback’systempressures
Your machine is equipped as standard with an arm ‘breakback’ system called Dual-Pressure
(gure 1.18) French patent applied for 15th Sept 2004.
Normally, in the event of meeting an obstacle or when the forward speed is too high for the vegetation
being cut, the pressure rises in the orientation cylinder of the machine. When a designated pressure is
exceeded, a regulating valve opens and allows the arm to ‘breakback’ towards the rear.
In the Dual-Pressure system, the opening pressure of the regulating valve depends on the position of
the arm. If the distance from the centre-line of the tractor to the tool is more than the halfway reach
point, the pressure necessary for ‘breakback’ will be increased, or reduced if nearer.
gure 1.18
breakback pressure
110 bar
distance between centreline of
tractor and tool is less than half of
the maximum arm reach
obstacle
breakback pressure
160 bar
distance between centreline of
tractor and tool is more half of
the maximum arm reach.
obstacle
Dual-Pressure system
Pressure at DP valve test point (g 1.19 & 1.20) 110 bar
Pressure (high setting) at valve block 160 bar
gure 1.20
gure 1.19