The turning radius on a forklift is also known as the turning circle. This information is important for a machinery driver to have. It gives the operator the information of how much space is required to turn the lift truck around. For example, a tighter turning radius allows the equipment to successfully function in crowded areas and restricted places, therefore improving the forklift's maneuverability. Operators who are not aware of this measurement can cause damage to the property or to the machinery.
Before testing the turning radius, check the steering geometry alignment and correct it if it requires adjustment. Begin the test with having the trained driver inside the cab to control the machine's functions. A second person on the ground utilizes a spray bottle or a hose to wet the inside and outside of the unit's wheels. Next, drive the equipment in a complete circle with the wheels turned to the maximum angle. Repeat the procedure once and continue if necessary to wet the wheels.
After this measurement test has been done, measure the watermarks left by the tires utilizing a tape measure, from the midpoint of the tire mark to a similar point across the circle's diameter. For the outside turning diameter, measure the watermark left by the outside 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 diameter of the circle.
Drop a plumb line from the extreme outside radial extension on the machine in order to establish the wall-to-wall turning diameter. Once this is accomplished, next locate the point on the pavement directly beneath. This point to the turning center indicates the equipment clearance radius. As a rule, wall-to-wall turning diameter is twice the vehicle clearance radius.