Thermographic inspection, through the use of portable infrared imagers, has been performed on over two thousand pumping units in several active Permian Basin oil fields in the past two years. An infrared imager with camera adaptability was used to inspect saddle bearings, equalizer bearings, wrist pin bearings, exterior gearbox bearings, electric motor and related switch gear on each beam-type pumping unit. In some instances, transformers were also scanned for thermal differentials. This technique detects and isolates abnormal variations in the radiant energy emitted from the bearings, motor and switch gear. Thus, qualitative and quantitative data on each problem bearing or electrical component was precisely established. Thermograms and photographs were taken to document the condition.