The JR Series JR-150-27 is a Pneumatic (Air over Hydraulic) Jack and is a versatile model capable of working with a great variety of mining equipment when used with the appropriate extensions. The available options for this jack include but are not limited to, manual load locks (locking collars), pneumatic remote and foam tires. This jack is commonly used with CAT777, 789, 793, 789, 785, 793, Komatsu 930. With 150-Ton capacity and the ability to work with extensions. Large tire make positioning this jack incredibly easy.