The spring to be tested will be pre-stressed in a fixture and put under Compression-Decompression cycle. Hydraulic Press will be used for Compression-Decompression cycles. The force to be exerted on spring will be set manually by adjusting Pressure Regulator of Hydraulic system. Stroke length of Compression will be set by locating sensors, alternately stroke length display with set point will be provided. Press will compress or Retract when set limits are reached. The max. ( Peak) & Min. force required for compression will be recorded in each cycle.