Wacker Neuson Telehandler TH412 Operator's Manual page 52

3 Introduction
Hydraulic system
The machine is equipped with two hydraulic systems and
one single hydraulic oil reservoir:
- Hydrostatic drive
- Steering and operating hydraulics
The diesel engine permanently drives a hydraulic pump
(variable displacement pump), the oil flow of which is sent
to a hydraulic motor flanged on the gearbox. The force of
the hydraulic motor is transmitted to the rear axle via the
transfer gearbox. At the same time, the front axle is driven
via the cardan shaft connection.
Adjustment is automatic and continuous, but depends on
engine speed and load. The travel speed depends on the
engine speed and machine load. The accelerator pedal
controls machine travel, which starts at the rated engine
speed and reaches full speed at maximum engine speed.
Depending on machine load, the output of the variable
displacement pump is automatically reduced to ensure
the best possible torque. The higher the load on the
machine (for example during loading work or uphill
machine travel), the more the travel speed is reduced.
This type of machine regulation makes the best possible
3-6
use of the entire power range. By controlling the brake-
inch pedal (inching = time-delayed; pedal on the left) it
also has its effect on machine regulation by precisely
slowing down the machine to a standstill at any engine
speed.
The steering and operating hydraulics are supplied with
hydraulic oil by hydraulic gear pumps. The gear pump is
flanged onto the variable displacement pump of the drive.
The hydraulic system is equipped with pressure limiting
valves, filters and an oil radiator.
BA TH412 * 06/2017 * 4512_3-1_Einleitung_en.fm