Mobilizer HF Group is a leader in manufacturing specialized Jack and Caster assemblies, which provide leveling and mobilization abilities for a deployable shelters such as those used on U-2, Global Hawk, and Predator ground control stations. HF Group's Jack and Caster assemblies feature dual inflatable tires, a caster-dolly mechanism, a jack mechanism, a rachet jack handle, a pedal-actuated brake, and a sand pad. Four Jack and Casters may be attached to a shelter to enable the raising and lowering, and movement capabilities of the shelter. Wheel assemblies swivel freely 360 degrees or can be locked in 45 degree increments to ensure precise positioning. Further, activating the brake ensures immobility and additional shelter stablility. The Jack and Caster can be extended by using the integrated manual jacking mechanisim or by attaching a specialized electric drive motor with a socket attachment. The jacking mechanism implements a mechanical drive mechanism, which ensures fixed positioning over extended periods of time, thereby reducing the need for realignment. Fully loaded, Jack and Caster assemblies enable 25 inches of ground clearance indefinitely. Jack and Caster Key Benefits: Lightweight, cast aluminum construction Dual inflatable tires 360 degree free swivel casting for precise shelter positioning Mechanical drive Mechanically operated (foot) parking brake Locking caster, 45 degree intervals Mechanical steering bar Low maintenance mechanical ratchet handle 10,000 lbs. vertical load capacity Attachment for electrical drive motor to raise and lower jacking strut All load bearings are "Timken" tapered roller bearings HF part number: HF0631104 NSN: 5340-01-525-7931 Accessories Cast aluminum mounting brackets for inboard/outboard positioning Stiffener assemblies for shelter mounting Spare tire with mount Electric drive with socket