Abstract: A suspension rolling tester is provided for measuring the movement of suspensions of wheels to be measured vehicle when the vehicle is rolled. The suspension rolling tester includes a roll input device and measuring devices, wherein the roll input device guides rear wheels or front wheels not to be measured of the vehicle to be measured in the non-restriction state, the measuring devices guide front wheels or rear wheels to be measured which are opposite to the wheels not to be measured, wherein the roll input device applies a rolling force to the rear wheels or front wheels not to be measured, and the measuring devices detect suspension data of the wheels to be measured when the rear wheels or front wheels not to be measured are rolled.

Abstract: The invention inspects a shock absorber installed in a vehicle between a vehicle body and a road wheel by manually moving the vehicle body in a generally vertical direction of the vehicle until the vehicle body initiates vibration in the vertical direction, detecting vertical displacement of the vehicle body, detecting load imposed on road surface by the road wheel, giving, as a damping force, the load detected at moment when the detected displacement is zero, and calculating a first derivative, with respect to time, of the detected displacement at the moment to give the result as a piston speed of the shock absorber at the moment. The damping force against the piston speed is compared with a predetermined damping force against the piston speed to evaluate whether the shock absorber has been deteriorated or not.

Abstract: A compliance tester tests the flexibility of a motor vehicle suspension system which includes a bush. The tester comprises first and second bases between which is defined a fluid chamber whose volume is variable upon a vertical movement of the second base relative to the first base. Horizontally movably disposed on the second base is a table on which, upon testing the flexibility of the suspension system, a tire of the motor vehicle is put. A hydraulically operated power unit connected to the second base is fluidly connected to the fluid chamber. A piston of the power unit is connected to the table, so that when the tire of the vehicle is put on the table thereby compressing the fluid chamber, the power unit pushes the table thereby biasing a contact point of the tire in a given direction.