Tensioner Operating Procedure

Pressurize the system initially to 70 barg (1000 Lb/in²) and check the pressure gauge on the hydraulic pump unit to ensure the pressure is steady.

If the pressure drops, release system hydraulic pressure to zero and investigate for leaks.

While the system is at zero pressure, tighten any leaking connections.

All investigation, maintenance, or leak repair work must be carried out when the tensioning system is at zero pressure.

Re-pressurize the system to 70 bars (1000 Lb/in²) and when the pressure is steady with no leaks in the system, continue to pressurize the system up to the required hydraulic pressure.

Continually monitor the tensioner for piston over-stroke as indicated by the appearance of the red stroke indicator.

If the red stroke indicator appears before the required hydraulic pressure has been achieved, go to step (9) and (10), then re-commence the tensioning procedure.

When the required hydraulic pressure is achieved, stop the pump, maintaining the system pressure.

Check the pressure gauge on the hydraulic pump unit to ensure the pressure is holding steady.

When the hydraulic pressure is steady, approach the tensioners and insert the round bar provided into the holes in the nut socket (if used) or nut.

Use the round bar to rotate the nut down onto the joint face. Ensure that the nut is fully seated on the joint face.

Apply force to the round bar to ensure the nut is firmly seated.

Release system hydraulic pressure to zero.

If the pistons are close to their fully extended position, the Airbac-S system will push the pistons to the zero-stroke position, when the hydraulic pressure has been released.

If assistance is required to return the piston use a tommy bar inserted into the thread inserts and wind the pistons down to their zero-stroke position.