DEUTZ-FAHR AGROTRON 106 MK3, Workshop Manual

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5. HYDRAULIC SYSTEM
DESCRIPTION
The AGROTON MK3 series may be equipped with two different types of hydraulic system:
1 - CCLS hydraulic system, with fixed displacement pump.
2 - LS hydraulic system, with variable displacement pump.
The CCLS system has fixed displacement gear pump that supplies oil to the various hydraulic functions at a flow rate that
is proportional to the engine speed.
When the engine is running at maximum speed and none of the hydraulic actuators are in operation (e.g. during road use),
oil is pumped through the system at around 80 litres per minute (with a consequent increase in temperature and fuel
consumption).
Furthermore, if two or more actuators are operated when the engine is running at low speed, the pump will be unable to
meet the demand and consequently the actuators will operate at a lower speed in accordance with the available oil flow.
The LS system has a variable displacement piston pump which sends oil to the hydraulic functions only according to need.
In this system, when the engine is running at maximum speed and no hydraulic actuators are in operation, the pump
effectively only circulates the oil that is dispersed through internal leakage in the devices connected to the system (just a
few litres per minute), thus saving energy and fuel.
Furthermore, the variable displacement pump has a higher capacity than the gear pump (120 litres/min.) and can thus
provide a sufficient flow rate to operate all the hydraulic functions simultaneously.
HYDRAULIC SYSTEM DESCRIPTION