Challenger Techstar CVT MT525B Series, Operators Instruction Book

Page: 230 / 248

7 . ACCESSORIES AND OPTIONS
7.92 Challenger MT500B EU
7.15 - FRONT LINKAGE
7.15.1 - General
The front linkage should be used in compliance with safety
instructions. It should be used exclusively for agricultural
purposes, i.e. for hitching mounted and pushed agricultural
machinery.
The front linkage can carry or push an implement.
The design of the linkage and tractor allows the use of
heavy implements, but it is advisable to avoid submitting
the linkage to excessive loads.
7.15.2 - Use
IMPORTANT: Position the circuit valves located at the
rear of the tractor as shown on the decal.
The front linkage is controlled by one of the spool valve
control levers or by Joystick 1 (Fig. 231) located in the cab
(depending on fitted options).
The maximum flow rate is adjusted in the spool valve block
at the rear of the tractor, either from the cab (hydraulic con-
trols) or using the electrohydraulic controls of the SMS
(Spool Valve Management System).
Controlling the depth:
For toothed implements, the depth is controlled by of the
implement depth wheels; in this case set the spool valve
to floating position (no load transfer takes place).
Controlling the work depth of the implement after setting
the position:
An average depth level should be set using the height /
depth control (load transfer is recommended to improve
tractor tyre grip).
It is then possible to use the draft control mode of the Front
Dual Control to adjust the work depth depending on the
traction load applied to the rear linkage, especially when us-
ing a front and rear plough.
For crushing implements, the tractor load must be trans-
ferred to the implement. This is obtained by pushing the le-
ver or SMS control forwards, as long as the linkage is
double acting.
Mounted implements (ballasting, hoppers, etc.) are raised
to avoid decreasing ground clearance.
• External controls
The external lifting / lowering controls 3 (Fig. 232) can only
operate with the engine running.
Spool valve to be used according to colour
Open
centre
LS
Mech
LS
Joystick
Model fitted with mechanical spool
valves
Red Green Green
Model fitted with 3 or 4 “electric” +
FRONT / BACK Dual Control spool
valves
Black
Fig. 230
Z2-403-03-04
Z2-478-05-03
Fig. 231
1
2
Fig. 232
Z2-399-03-04
3