The test rig enables testing of the "mudpumping effect" in the rail bed on railroad tracks. The "mudpumping effect" is the undesirable effect in railroad construction in which the fine-grained subgrade penetrates the track ballast. The test system simulates the load applied to the rails by a moving train at 300 km/h. The load is applied by an Oscillating Oscillator. The force is applied by an oscillating cylinder. The force curve is recorded locally at the test stand for long-term tests of up to 500,000 cycles.