DMC developed the software to control a system for the hydraulic testing of axle-type specimens. These specimens are gripped in a rotating jaw, where the system applies varying loads to them through "V" blocks. The specimens can either be run dry or with lubrication. As the test is run, specimen temperature, fluid temperature, load, speed, torque, and wear measurements are recorded. Using this data, the friction, wear, and extreme pressure properties of fluids are evaluated. The system uses LabVIEW to control load and speed through PID loops. Temperature is controlled by cascading PID control of the heater element with the specimen or fluid PID loop. The software allows manual operation, as well as defining and running auto-test profiles. In addition, data analysis on current and old tests, including trending and variable comparisons, can be done while a test is running.