4 . MAINTENANCE AND ADJUSTMENTS
4.27
4
Before reactivating the ELC calculator, ensure that settings
(A) (depth) and (C) (selection) cannot cause any dangerous
movements of the drawbars.
4.14 - STEERING
CAUTION: the steering type is set to hydro-
static power steering When the engine stops,
the booster pump no longer supplies the sys-
tem. Hydrostatic steering then passes auto-
matically to manual operation mode which requires
greater effort when turning the steering wheel. This
mechanism therefore ensures safe operation in all con-
ditions of use.
IMPORTANT: However, it should be remembered that
hydraulic systems can only operate effectively if main-
tained in perfect condition, the recommended fluids are
used and the tightening of the various unions and
sump oil level are checked regularly.
4.15 - AUXILIARY HYDRAULICS SYSTEM
General
Tractors are designed to be fitted with up to 5 spool valves.
4.15.1 - Flow Control Valve
The oil flow from the spool valve can be modified depend-
ing on implement requirements, including when maximum
flow is not required, for example for a specific application
or when the speed of the hydraulic motors needs adjusting
(using the spool valve specific to the motor concerned.
It is also useful for keeping available a flow of oil for the si-
multaneous use of the linkage and of the auxiliary hydrau-
lics.
To regulate the flow of oil, turn the knob 1 of the relevant
spool valve (Fig. 48).
Zero leak option
All spool valves have a small internal leakage, which may
result in small changes in the implement settings. This
spool valve avoids this problem.
Other spool valves not available from the company can be
obtained through your dealer from the supplier. However,
in such cases the company disclaims any liability for possi-
ble consequences.
4.15.2 - Type of controls available (Fig. 49):
1. Control for mechanical spool valve.
2. Control for electric spool valve.
4.15.3 - Hose connection
A colour (A) on the cover indicates the auxiliary spool valve
to connect.
IMPORTANT: The two hoses of one ram must be con-
nected on the same auxiliary spool valve.
Ensure male and female couplers are kept clean at all
times.
Fig. 48
1
Z2-483-05-03
Z2-482-05-04
Fig. 49
Z2-104
A
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