Abstract: A method for balancing a rotor of an alternator in a diesel-electric locomotive in which the rotor is drivingly coupled to a power output shaft of a diesel engine. A speed sensor and a vibration sensor are coupled to the rotor for providing output signals representative of instantaneous rotational velocity and instantaneous amplitude of vibrational motion of the rotor, respectively. In the inventive method, the rotor is accelerated to a first preselected rotational velocity and a first rotor unbalance is determined from the velocity and vibration signals. The rotor is then accelerated to a second preselected rotational velocity and a second rotor unbalance is determined. The first and the second rotor unbalance determinations are combined to identify a first correction weight and position thereof for minimizing the first and the second rotor unbalance. The identified weight is installed and the process repeated until the unbalance is corrected such that vibration is less than a preselected maximum value.

Abstract: A method of adjusting the weight distribution of a locomotive having a pair of interchangeable 3-axle asymmetrical truck assemblies comprising loading the locomotive body with its normal supply of fuel, water, etc.