EPAX ROPAX RPM 7700 VII, Original Operating Manual, Page: 13 / 76

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2.5 Technical data
2.5.1 Technical description
The Epax Systems Jumbo Mobile Compactor consists of the frame, the drive wheels and the steering axle.
The frame contains all drive and control units of the Epax Systems Jumbo Mobile Compactor.
The electrical control system and the drive unit are located in the frame.
Drive
A diesel engine is used to drive the steering and operating hydraulics and the hydraulics used for driving
mode.
The driving hydraulics drive the wheel motors, which transmit power to the front axle.
In the rear, the steering axle is mounted on a ring mount.
Brakes
The travel drive is simultaneously used as a service brake. It affects the front axle. The brake is actuated
using the center position of the joystick (locking position). A switch is used to also activate the parking brake.
Steering
A fully hydraulic steering system using 2 double-acting cylinders and a ring mount is used for steering.
Vehicle frame
The vehicle frame contains the electrical control system and the drive unit
Hydraulic system
The Epax Systems Jumbo Mobile Compactor is equipped with two hydraulic systems supplied from a
hydraulic oil tank:
• hydrostatic travel drive
• steering and operating hydraulics
The hydrostatic travel drive consists of a variable axial piston pump driven by the two wheel motors. The
variable axial piston pump is flange-connected to the diesel engine.
Adjustment is automatic and infinitely variable, but load-dependent. The travel speed is based on the unit’s
load. The joystick is used to start driving. The variable pump is controlled based on the speed of the Epax
Systems Jumbo Mobile Compactor. The higher the load on the Epax Systems Jumbo Mobile Compactor,
the lower the ideal utilization of the overall capacity. The joystick can also be used to affect the control in
such a way that the Epax Systems Jumbo Mobile Compactor is slowed down to a halt.
2. 05