The tractor test systems were conducted to evaluate the effect of the modified system and compared to the system used in tractor test station on the value of tractor performance. The developed device is consisted of transducer, signal conditioner and recorded unit. The hydraulic pull dynamometer, strain gage pull dynamometer, load cell, hydraulic PTO dynamometer, magnetic pickup transducers and fifth wheel were used to measure tractor parameter. Statically analysis shows that no significant between devolved device (named system 1) and the system used in tractor test station (named system2). Devolved device is expected to be a worthy one to establish reliable data of the performance parameters of tractors and implements.