Hydraulic supply for active hydraulic rear axle steering of mobile working machine i.e. mobile crane, has motor driven main pump and wheel-driven spare pump each applying pump-specific output pressure

摘要

The supply has an outgoing supply pressure line (50) for providing the supply pressure for a connectable load i.e. hydraulic guidance circuit. A motor driven main pump (1) and a wheel-driven spare pump (2) apply pump-specific output pressure (10) and are indirectly connected with the supply pressure line over a non-return valve (51A), where the arrangement of the non-return valves ensure that the highest pump-specific output pressure is feedable always into the supply line. The pumps are associated with a common control line (60). An independent claim is also included for a mobile crane comprising an active hydraulic rear axle steering.