The employee was operating a hydraulic torqueing machine, completing a torque sequence on a 16" discharge valve. He was using both hands to pick up and position the hydraulic torqueing machine wrench head onto the bolt. The employee had been working with a coworker who was operating the remote controller of the hydraulic torque wrench head. The coworker then activated the wrench head, which was set at 2800 psi and amputated the right index fingertip of the injured employee.