Ammann APA55/46 Hydraulic Rotator Add-on Compactor, 3 year warranty The APA 55/46, with an operating weight of 370 kg and machine width of 460 mm, is suited for medium-sized excavators with more than 5 tonnes of operating weight. The compactor can be mounted in a few minutes and does not require hydraulic quick coupling devices. Only two hydraulic hoses are needed. The plate is equipped with a twin-shaft directional exciter featuring a relatively high frequency and low amplitude, which helps protect both the excavator and surrounding buildings. Features and Benefits Patented vibration limitation system protects the excavator frame and operator 2-shaft directional exciter Self-blocking mechanical rotating device Rubber bushings prevent metal-on-metal contact under extremely high pressures Runs on hydraulics, reducing emissions and fuel consumption Maintenance-free exciter unit