Maximum Stroke Indicator
The maximum approved stroke of the hydraulic nut is indicated by a red line hard stamped into the circumference of the piston.
Continually monitor the piston stroke during pressurization. If the maximum piston stroke indicator becomes visible on any of the hydraulic nuts before the target pressure is reached, immediately stop the pump and release the pressure to zero. Rotate the hydraulic nut body down on the bolt by using a tommy bar until the loadcells are shut down into the zero stroke position. Recommence the tensioning procedure.
Failure to stop the tensioning sequence once the red piston indicator becomes visible may result in failure of the hydraulic nut seal and will eventually cause a release of high pressure fluid which could lead to injury or death.
Escaping high pressure oil can penetrate the skin and is extremely dangerous. Seek urgent medical attention if oil penetrates skin.
