Auto Reset - Sumo Subsoiler Operator's Manual And Parts List

4.3 Auto Reset hydraulic circuit
1) To lift the legs up and out of the work position; pressurize line B (the lower of the two hoses
entering the valve block & marked "B" on the valve itself). The legs will lift as oil is returned to
the tractor through Line A.
2) To lower the legs back down and into the work position; pressurize line A, the legs will lower one
by one. Keep pumping until all of the legs come to a stop at the end of their stroke. Keep
pumping for a few more seconds and the two lines will then pressure up. Keep an eye on the
gauge on the right hand side of the machine as this displays the leg trip resistant pressure. The
system needs then to be put into the "float" or pressureless state between the tractor and the valve
so that any back pressure from the tractor does not affect the preset valve pressures. Putting the
system into "float" means the factory set pressure readings of 80bar on the full bore side of the
ram (gauge on RHS of machine) and 20bar on the rod side of the ram. This is unless of course
they have been adjusted to suit local conditions. The resistant pressure in adjustable up to a
maximum of 150bar
3) To increase the trip resistance of the legs – the knob marked X should be wound in. The lift and
lower process should then be repeated.
Page 9
A
B
X
A
B