Patent ID: 8640830

Claim:
A double stacker industrial truck comprising: a first mast and a second mast; a first load carriage and a second load carriage; and a hydraulic system comprising: a pump for providing hydraulic fluid to the hydraulic system; a first hydraulic lifting cylinder for moving the first load carriage and a second hydraulic lifting cylinder for moving the second load carriage of the truck; and a flow divider having an inlet, a first outlet, and a second outlet for dividing a flow of hydraulic fluid between the first hydraulic lifting cylinder and the second hydraulic lifting cylinder, wherein: a first directional valve is connected to the second outlet of the flow divider by a duct (D 1 ), said first directional valve is connected to the second hydraulic lifting cylinder by a duct (D 2 ), and said first directional valve is connected to the first hydraulic lifting cylinder by a duct (D 3 ); the first directional valve is arranged to open in a first direction for leading hydraulic fluid through duct (D 2 ) to the second hydraulic lifting cylinder or to open in a second direction for leading hydraulic fluid through duct (D 3 ) to the first hydraulic lifting cylinder.