Hydraulic System; Three-Point Hitch Lowering Speed Control; Ways To Regulate Inner Hydraulic Circuit - Zetor Proxima CL 80 Operator's Manual

HYDRAULIC SYSTEM

Hydraulic system
The hydraulic system is intended for lifting and lowering of agricultural machines and implements attached in
the rear three point hitch.
It consists of the inner and outer circuits. Gear pump is the
source of pressure oil.
Oil is taken from reservoir shared by gearbox and
transmission.
Hydraulic pump cannot be switched off. If the engine is
working, the pump is on.
The amount supplied is:
standard 50 l/min
on request 60 l/min
The pressure in hydraulic system raised by the hydraulic
pump is restricted by a safety valve to 19 MPa.
PGPPN036

Three-point hitch lowering speed control

Hydraulics control panel is located in the area of the right wing.
Controlling the rear three-point hitch is enabled by the inner hydraulic circuit (1).
Controlling outer hydraulic circuits (couplers) is enabled by outer hydraulic circuit (2).
PCLPN082

Ways to regulate inner hydraulic circuit

PGPPN176
Hydraulic system allows of three ways to regulate the lifting of the rear three-point hitch:
Position regulation (img. 1) - the tool connected to the rear three-point hitch is automatically kept in the same
height (position) with regard to the tractor.
Mixed regulation (img. 2) - a combination of position and power regulation. Suitable mainly for tilling areas of
different soil resistance.
Power regulation (img. 3) - the tool connected to the three-point hitch is automatically being adjusted
depending on changing soil resistance.
All the regulations can also be used when working with a tool equipped with a support wheel in so-called free
(floating) position.
111