Abstract: On November 8, 1990, Employee #1 was using a 6 ft Werner ladder, model 6206, to work on a hydraulic compressor. He was pushing a water tube into the center of an 8 in. steel pipe while a coworker watched the pressure gauge. At approximately 8,000 psi, the coupler failed to hold the force. Employee #1 was struck by the compressor unit, sustaining chest injuries and a puncture wound to his right arm. Subsequent investigation revealed that the coupler was not adjusted properly. The rebac in the coupler was at a depth of approximately 1 in., although the specified depth was 3 in. The employer had not instructed employees on job-related hazards.