¦ Before use always check that all screws and plug-in connections and respective safety devices fit correctly. ¦ Damaged or worn parts must be replaced immediately and the apparatus is not to be used until restored. In case of need, exclusively Original KETTLER replacement parts should be used. ¦ The device is safety tested. ¦ Improper repair or constructional changes (disassembly of original parts, attachment of unapproved parts, etc.) can result in danger to the user. Modifications to the appa