Turf Tick Products UNIVERSAL AUTOSTACKER, Оригинальное руководство пользователя

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The system function as follows:
When the autosteer-system is not activated, the oil from the steering pump is sent through the
selector-valve (V1) to the steering-orbitrol. When the steering-wheel of the orbitrol is turned,
then oil is sent to the steering cylinder and the steering-wheels will turn. In the original
steering-system of the tractor (before the autosteer-system was mounted), the maximum
pressure of the steering system is set by a pressure relief valve. Sometimes this pressure relief
valve is mounted at the steering pump, sometimes at the orbitrol.
The pressure relief valve O1 of the autosteer system has to be set at approximately the same
value as the original pressure relief valve of the tractor (depending of the tractor will this be
approx. 140 – 190 bar)
When the autosteer-system is activated the selector-valve V1 is switched so that the oil is
pumped to the bidirectional valve V2. When valve V2 is not activated all the oil is guided
back to the reservoir. The hydraulic pressure will be near to 0 bar. For
some orbitrols it is
necessary to block the way between the steering cylinder and the orbitrol when the autosteer is
activated. This is done by the valves V3. These valves are simultaneously switched with valve
V1.
When the bidirectional valve V2 is activated (by the electronics of the steering-unit) than the
oil will be guided to the steering cylinder via a resistance (1 mm in diameter) so that the
cylinder will move very slowly. The maximum pressure is configured by the pressure relief
valve O2. Because of the resistance (of 1mm) most of the oil will be guided via this pressure
relief valve back to the reservoir.
It is very important to configure pressure relief valve O2 as low as possible (somewhere
between 50 and 100 bar). Reason for this is that the lower the steering-pressure is the lower is
the heating of hydraulic oil during steering by the autosteer-system. When the relief valve is
configured too low, then the steering-wheels won’t turn during steering by the autosteer-
system.