Richiger EA 910, Operator'S Manual

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As will be seen in this manual, there are frequent references to the first lever, the second lever, and the third lever of the valve that regulates hydraulic
flow rates, and thus operating speeds. In the diagram below can be seen the first and second levers (which open and close the hydraulic cylinders)
mounted on valve sections to the left of the control knob, and the third lever (which drives the roller) mounted on a valve section to the right of the
control knob.
The diagram shows the speed effect that turning the knob clockwise or anticlockwise, in combination with each specific lever, will have on the different
hydraulic circuits.
For example, setting roller speed on initiating extraction is simpler if starting from low revs and then increasing them as necessary. In this case the
knob can initially be turned completely clockwise, in which position the roller will not move at all, and then progressively be turned counterclockwise
until the desired rpm are attained. In another example, if one of the cylinders does not move when the corresponding lever is operated, it would
indicate that the knob is turned completely anticlockwise and no oil is flowing through that circuit. It will be therefore necessary to turn it clockwise.
04
A word about the hydraulic controls.
905