Challenger Techstar CVT MT525B Series, Operators Instruction Book

Page: 152 / 248

7 . ACCESSORIES AND OPTIONS
7.14 Challenger MT500B EU
7.3 - REAR DUAL CONTROL
7.3.1 - General
The "DUAL CONTROL" is a digital control monitoring sys-
tem for automatic operation of a semi-mounted plough at
furrow starts and ends.
It automatically reports the linkage position changes to the
depth wheel position in order to obtain a simultaneous hor-
izontal movement of all the shares.
The information necessary for the correct operation of the
system is acquired by sensors, processed by the "DATA 2"
onboard computer and the electronic linkage calculator
which control the operation of an electrohydraulic spool
valve.
This system is currently available on tractors fitted with
"LOAD SENSING" hydraulics.
Two additional functions,
-REAR CTRL- and -REAR ADJ-
are available from the screen of the "DATA 2" onboard com-
puter
.
.
7.3.2 - Description of the adjustment screen
(See section 7.4)
Press key 2 or 3, (Fig. 14), drop-down menu appears.
Select,
-REAR ADJ- ; four new symbols are displayed
(
Fig.
15
).
• Ref. A to H: this information is used to adapt the imple-
ment to the tractor hydraulic linkage.
• Ref. I to P: this information is used to operate the sys-
tem at automatic furrow starts and ends.
To select one of the display windows, use keys 6-1 and 6-
2 (Fig. 15).
A B: High linkage position.
C D: High depth wheel position.
E F: Low linkage position.
G H: Low depth wheel position.
I J: Plough length in “furrow start" phase.
HIGH HORIZONTAL SETTING: Used to
store the high position of the linkage and of
the plough depth wheel.
LOW HORIZONTAL SETTING: Allows to
store the low position of the linkage and of
the plough depth wheel.
K L: Partial lowering of depth wheel in “furrow start”
phase.
M N: Plough length in “furrow end" phase.
OP: Partial raising of depth wheel in “furrow end” phase.
PLOUGH LENGTH AND PARTIAL LOW-
ERING SETTING:
Controls the depth of
penetration into the soil of the last share of
the plough.
PLOUGH LENGTH AND PARTIAL LIFT-
ING SETTING:
Allows to store the low po-
sition of the linkage and of the plough depth
wheel.
V 901
V 902
2
14
3
COST/L
COST/AREA
UNITS
TRAIL IMP
ADJ. TRAI
-----DUAL----
FRONT CTRL
REAR CTRL
FRONT ADJ
REAR ADJ
Fig. 14
1 2
6
A
B
E
F
I
J
M
N
C
D
G
H
K
L
O
P
Fig. 15
V 903
V 904