84
English
The hydrostatic pump physically consists of one
block but is made up of two connected pumps. Each
pump provides the drive engine of the relevant roller
with oil pressure for the driving mechanism. Both
pumps run at the same speed and consequently
provide equal flow rate and power. Each pump has
its own drive: a turnable axis end. Depending on the
angle, the oil stream within the pump will be subject
to more or less ‘choke’ and will be redirected. This
allows for adjustment and control of the spinning
direction and the speed on the rollers.
Alignment of the wheel traction takes place via the operation mechanism of these axis ends.
11.4.9.1 Cruise Controle
When cruise control is engaged, it can happen that the machine deviates from its straight course.
• Temporary or ‘one-off’ deviations can can usually be attributed to fluctuations of the rollers’
grip on the surface. This, in turn, may have to do with an uneven surface, a heterogeneous
structure or a difference in humidity between the left and right roller.
• If the phenomenon occurs on an even surface, the operation of the hydrostatic pumps must be
adjusted.
Proceed as follows :
The cruise control is a relatively simple mechanism. By operating the cruise control lever, a rod
mechanism basically activates the operation of the two individual traction levers.
In other words: one lever (hence one movement) turns the two
steering axes of the hydrostat evenly at an identical angle. As a
result the machine will ride a straight line at constant speed.
Two rods transfer the movement on the cruise control lever
to the steering axes. If under circumstances, the rods become
different in length, the movement of the cruise control lever
will not be translated into the same angle for each axis. The
machine will drift off course as a result. An adjustment device
has been provided on both rods.
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