Fewer hydraulic hoses to lift? Electrical proportional control could be what you need. Contact between the trailer and tractor takes place via an electrical cable and one hydraulic hose for pressure and one for return from the tractor. The crane is controlled with two joysticks mounted inside the cab. As the valves are proportionally controlled, control is performed with sensitivity in the joysticks as opposed to an electrically on-off controlled valve. The controlling is also programmable.
