The forklift's turning radius is also called the turning circle, that is important information for the operator to have. It gives the operator the knowledge of how much space is needed to turn the forklift around. Like for instance, a tighter turning radius enables the machine to successfully operate in tight places and congested areas, thus enhancing the maneuverability of the lift truck. Operators who do not know this measurement may 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. Start the test with having the trained operator in the cab to control the equipment's functions. A second individual on the ground utilizes a hose or a spray bottle to wet the outside and inside of the unit's wheels. After that, drive the machinery in a whole circle with the wheels turned to the maximum angle. Repeat the process once and if necessary, continue to wet the wheels.
After this measurement test has been done, measure the watermarks left by the tires using a tape measure, from the tire mark's midpoint to a similar point across the diameter of the circle. For the outside turning diameter, measure the watermark left by the outside tires from one side of the circle to the circle's opposite side. The inside turning diameter could be established by stretching the tape measure across the circle left by the inner tires. After that, divide these numbers in 2 to be able to establish the turning radius. Be certain to note that the turning center is the midpoint of the diameter of the circle.
In order to determine the wall-to-wall turning diameter, drop a plumb line from the extreme outside radial extension on the machinery. After this is done, the next step is to find the point on the pavement directly beneath. This point to the turning center indicates the vehicle clearance radius. As a rule, wall-to-wall turning diameter is twice the clearance radius of the machinery.