Hydraulic transmission repair and test bench

The bench is designed for post-repair running-in and acceptance testing of the hydromechanical transmissions fitted to rail tractors, motor trolleys, maintenance railcars and track machines. During testing it monitors the oil pressure in the torque converter and clutch circuits, the positive engagement of the gear stages and reverse, the torque at the output shaft, temperature and leakage, as well as noise and vibration at characteristic points.

The transmission under test is placed on a mounting trolley, where repair operations are carried out, and moved along the guides to the test station. The input shaft is coupled to a variable-frequency drive motor and the output shaft to a hydraulic brake that generates load across the required range. Torque sensors on both shafts allow the transmission efficiency to be calculated at every operating point.

The bench comprises a bed with guides, a mounting trolley, a drive unit, a loading device with a water cooling system, an oil system with filtration and a cooler, and an operator console with a controller. Run-in programs are defined per transmission type and executed automatically with all parameters recorded; an acoustic enclosure, additional adapter flanges and vibration measurement are offered as options.