Abstract: A test stand and related method for testing a hydraulic oscillator cylinder having an oscillating drive includes gas-filled shock absorbers for reacting oscillating movement of the oscillating drive to simulate operational load conditions of the oscillator cylinder. The shock absorbers are mounted on a rigid structure and preferably abut an oscillating member mountable on the oscillating drive to react the oscillating movement thereof. The oscillating member may be disposed between a pair of rigid members on which the shock absorbers are mounted whereby one set of shock absorbers reacts movement of the oscillating member in one direction and another set reacts movement of the oscillating member in the opposite direction. Translating structure may extend between the oscillating member and oscillating drive and through a hole in one of the rigid members. Guide shafts may guide oscillating movement of the oscillating member. Gas pressure within the shock absorbers may be controlled.

Abstract: A test stand and related method for testing a hydraulic oscillator cylinder having an oscillating drive includes gas-filled shock absorbers for reacting oscillating movement of the oscillating drive to simulate operational load conditions of the oscillator cylinder. The shock absorbers are mounted on a rigid structure and preferably abut an oscillating member mountable on the oscillating drive to react the oscillating movement thereof. The oscillating member may be disposed between a pair of rigid members on which the shock absorbers are mounted whereby one set of shock absorbers reacts movement of the oscillating member in one direction and another set reacts movement of the oscillating member in the opposite direction. Translating structure may extend between the oscillating member and oscillating drive and through a hole in one of the rigid members. Guide shafts may guide oscillating movement of the oscillating member. Gas pressure within the shock absorbers may be controlled.