Liebherr Truck-mounted concrete pumps - Manual (Page 11)

11
Reliable hydraulics
Open hydraulic system
Liebherr concrete pumps function with an open hydraulic circuit and precision
control. This ensures high pump outputs with excellent efficiency, as well as a
powerful changeover from the S-pipe.
The advantages are astounding:
Pump cylinder and S-pipe changeover are pressurised by the main pump
• No storage charging pump necessary,
• No feed pump necessary
• No pressure storage necessary (no risk of accident)
• Therefore full pressure or increased power with S-pipe changeover (up to 320 bar)
• Servicing is simplified
• Improved oil cooling due to increased oil volumes
• Constant swing times for S-pipe, independent of concrete consistency
High-grade hydraulic components from
renowned manufacturers guarantee
optimum operational safety.
High-grade components
The hydraulic system is significantly responsible for operation of the concrete
pump. Reliability, as well as the extent of servicing work which may be required,
is largely dependent upon the quality of components in the hydraulic system.
Liebherr therefore only use components from renowned manufacturers which
have undergone meticulous testing. The hydraulic circuits are monitored by a
diagnostic module.
Hydraulics
Distributor boom
Valve block
The diagnostic module allows an
overall view of the functions of
the hydraulic circuits.