Description
78 - 131
Operating manual, Dumper – 3012 PLUS
Status 28 April 2015
Bergmann Maschinenbau GmbH & Co. KG
8.2.3. Auxiliary brake
When releasing the accelerator pedal, the hydrostatic travel drive slows down the truck so that, under
normal load conditions, the service brake often does not need to be used. It therefore serves as a wear-
proof auxiliary brake.
8.3. Working and steering hydraulics
All working cylinders of the working equipment and the steering cylinder are supplied by a gear pump.
The hydraulic steering system for the operation of the steering cylinder is supplied through a priority
valve. The oil not required for steering is available for the working cylinders of the working equipment.
The oil flow rate depends on the engine speed: at low engine speed, the trough movements controlled by
the joystick are slower, at high engine speed they are faster. As the control valve is designed as a
proportional valve, the trough can be moved quite gently with the joystick (at constant engine speed). The
steering valve is located in the right section of the front frame and is operated electrically. It supplies the
trough tilt cylinder / scissor-type lifter.
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