If the lower groove can be seen on the tensioning nut, the bearing disc must be replaced.

    Secure the crane girder (e.g. using a suitable lashing strip) to prevent it falling.

    Relieve the load on the crane girder to such an extent that the weight is no longer exerted on the crane girder suspension.

    Pull the locking pin out.

    Dispose of the locking pin. It must not be used again.

    Take the washer off the threaded rod.

    Loosen the locknut.

    Hold the tensioning nut tight and screw the threaded rod upwards and out of the tensioning nut.

    Take the circlip off the tensioning nut.

    Pull the tensioning nut down and out of the clamping joint.

    Take the bearing disc off the tensioning nut.

    Fit a new bearing disc to the tensioning nut.

    Push the tensioning nut into the clamping joint from below.

    Insert the circlip in the upper groove on the tensioning nut.

The lower groove must remain free and is used to check the bearing disc wear.

    Hold the tensioning nut firmly and screw the threaded rod into the tensioning nut from above.

    Secure using the locknut.

    Insert the washer from below.

    Push a new locking pin in place and secure it.