# 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.

Red piston overstroke indicator.
Red piston overstroke indicator.

Continually monitor the piston stroke during the tensioner 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 pistons until the pistons 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, can result in failure of the tensioner seal and will eventually cause a release of high pressure fluid which can 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.