Josam's Play Detector is a heavy-duty suspension parts checking system and is used on all axles to locate worn or loose components prior to alignment or during safety inspections. They simulate the turning, braking and acceleration forces on the steering, suspension and chassis of the vehicle being tested. They will check king pins, torque rods, spring eyes, U-bolts, shackles and all the other parts that locate the axles to the frame. A handheld control unit provides the operator with a light and the control of the travel, direction and frequency of the individual plates.