DEUTZ-FAHR AGROTRON 106 MK3, Workshop Manual

Page: 101 / 150

10-83
VERSION WITH VARIABLE DISPLACEMENT PUMP
FUNCTION
The function of the auxiliary services control valve is to control the flow of pressurised oil to the auxiliary services and the
rear lift.
This control valve is of the parallel circuit Load Sensing type.
DESCRIPTION
•
The pressurised oil from the pump (1) enters the inlet section (2); from here it is distributed to the spool sections
through internal passages.
•
All the spools, when operated, generate a pressure signal (Load Sensing signal) that is equal to the pressure demand
from each load.
The highest of these pressure signals, selected by the bistable valves (3), is sent to the variable displacement pump
through port
Y of the control valve.
•
On the lift spool section (6) there is an antishock valve (4) (on the UP control side) that serves to prevent excessive
pressure caused by jolting of the implement.
1 3 2
5 6 5
R
P
B A R1 A B A
X
X
F
1
0
2
S
H
F
1
0
2
Y
Y
D0005000
3 3
4
REAR GEARBOX
HYDRAULIC SYSTEM AUXILIARY SERVICES CONTROL VALVE (Version with variable displacement pump)