The turning radius on a lift truck is also referred to as the turning circle. This piece of information is essential for a machine driver to have. It gives the driver the information of how much space is needed to turn the forklift around. For example, a tighter turning radius allows the machine to operate successfully in crowded areas and tight places, therefore enhancing the forklift's maneuverability. Drivers who do not know this measurement can cause damage to the machinery or to the property.
Make the necessary steering geometry alignment corrections prior to testing the turning radius. The test should start with an operator trainer helping in the cab where they can assist to control the equipment's functions. Another person on the ground uses a spray bottle or a hose to wet the outside and inside of the unit's wheels. Next, drive the machine in a complete circle with the wheels turned to the maximum angle. Repeat the procedure once and if necessary, continue to wet the wheels.
Once this measurement test has been done, measure the watermarks left by the tires with a tape measure, from the midpoint of the tire mark to a similar point across the diameter of the circle. For the outside turning diameter, measure the watermark left by the exterior tires from one side of the circle to the opposite side of the circle. The inside turning diameter could be determined by stretching the tape measure across the circle left by the interior tires. Then, divide these numbers in 2 in order to determine the turning radius. Be certain to note that the turning center is the midpoint of the circle's diameter.
Drop a plumb line from the extreme outside radial extension on the machinery in order to establish the wall-to-wall turning diameter. When this is completed, next locate the point on the pavement directly underneath. This point to the turning center indicates the vehicle clearance radius. As a rule, wall-to-wall turning diameter is twice the equipment clearance radius.