18 Operators Manual
Wing pressure can be checked and adjusted
as follows. Always minimise tractor oil flow
rate provided folding speed is adequate.
Excessive oil flow leads to high temperatures,
inconsistent and inefficient valve operation.
This circuit is controlled by
overcentre locking valves
located in the valve manifold
block. These positively lock oil
pressure holding the wings until
pressurised by the tractor when folding or
unfolding to release it.
System pressure can
be retained even after depressurisation of
the tractor quick release couplings
.
Take extreme care when
checking the valve and circuits
adjacent.
Under no
circumstances attempt to
loosen or remove fittings
without prior reference to your TILLSO
authorised Dealer or TILLSO directly.
With the machine in working setting, tilt
forwards to raise the rear end half-way to 45°,
then pressure the wings to unfold fully.
Pressure the circuit until the gauge has
reached a constant maximum value. Return
the machine to ground contact and check for
evenness of ground pressure. Note the
gauge (holding down) pressure at this point.
If excessive down pressure is present at the
wing tips, pressure in the circuit should be
reduced. Adjust valve 3 anticlockwise to do
this. To confirm the setting is improved,
partially tilt the machine forwards, then
partially fold the wings. This releases
pressure in the circuit. Then unfold fully and
pressurise as above before returning the
machine to its working position. The gauge
should now read a reduced value. Continue
this operation sequence until the desired
down pressure is achieved.
Should the pressure require increasing,
repeat the above sequence whilst turning the
valve clockwise
The amount of over-centre valve holding
pressure resisting oil leakage back to the
tractor is adjusted by valves 1 and 2;
clockwise to increase hold pressure. These
valves can be used to reduce the holding
pressure if de-pressurisation is required.
Consult TILLSO if this is required.
4.7.3 Outer wing float (12m)
A spring controls the weight transferred from
the inner to outer wings. This is shimmed
during assembly. A stop bolt limits the down
float with shims to fine tune this.
Consult TILLSO if any servicing is needed on
this component. A clamp bolt is needed to
release the spring pressure when unpinning
the outer wings to allow the unit to be taken
apart.
4.8 Work Instructions
Driving speed:
12 -15 km/h for raking; 6-8 km/h for
cultivation rolling is normal.
This depends on the field conditions (type of
soil, surface trash, etc.).
Drive more slowly if the conditions are difficult
or a firmer finish is required.
