MATERIAL HANDLING MACHINE

Raising and lowering the driver’s cabin often places high demands on the comfort function. Smooth starting and braking are required, as well as leak-free holding in the raised position. The cabin control is a 4/3-way valve designed for operation with a constant displacement pump. The integrated inlet pressure compensator reduces pressure losses to a minimum. The main spool can be adjusted electrically-proportionally; with switching actuation, a ramp is imposed on the control spool through an internal circuit. Output A is locked leak-free by an unlockable check valve.

Lowering brake valves of this design ensure that pulling loads on the kinematic cylinder can be lowered in a controlled manner. The LHC type valves have integrated additional vibration damping. Furthermore, these valves are opened independently of load pressure.