ST-HBT-09 Hydraulic Warp Beam Low Lift Trolley. The prismatic forks drive underneath the warper’s beams or warp beams and lift them hydraulically. An anti-spread device is used for longer forks. The load is lifted by means of some pump strokes executed with the drawbar. With the lowering handle, the load is gently deposited on the floor. Polyamide wheels ensure smooth running on even ground. Polyurethane wheels are recommended for rough ground.