The loading tray is the platform on which the frame comes first. The sloping side of the platform ensures that the frame is lifted from the ground. The loading wheel should be halfway along the slope of the loading tray.
At the front of the loading tray is also a small “platform” with a hook on it. This activates the mechanism and unlocks the legs. It is therefore important that the chassis is never higher than the loading tray.
Vehicle interface XL36 in combination with pneumatic tire option