Along with ac motors, Model 8900 incorporates ACR System to promote acceleration, smooth operation, and energy efficiency in dock operations, trailer loading/unloading, and transporting pallets horizontally. Truck is available in 6,000 and 8,000 lb capacities, and fork carriage design has long-wearing components. Optional operator compartment sensor system decelerates moving truck if beams are blocked and will not permit travel until object blocking sensors is removed.