Since removing self-locking nuts with an inner plastic ring damages the inner plastic ring, self-locking nuts with an inner plastic ring may only be used once and must be replaced before the underslung travelling crane is installed.

On all side panels:

    Unscrew the self-locking nuts from the travel mechanisms.

On all side panels:

    Loosen spacer discs.

The spacer discs must not stick together.

    Screw on new self-locking nuts.

The nuts must not be tightened because the side panels must be movable for the installation on the crane track.

●   The self-locking nuts are replaced by new self-locking nuts on all travel mechanisms.