A system for servicing a turbomachine casing , the turbomachine casing having adjacent segments joined with a set of threaded fasteners , the system comprising: a threaded fastener tensioning device sized to fit over ends of a threaded fastener in the set of threaded fasteners , the threaded fastener tensioning device including: a retention component for retaining a first end of the threaded fastener ; and a tensioner for tensioning or de-tensioning a second end of the threaded fastener ; the system further comprising a mounting system coupled with the threaded fastener tensioning device , the mounting system for retaining the threaded fastener tensioning device proximate the adjacent segments of the turbomachine casing , wherein the mounting system includes a mounting arm coupled with the threaded fastener tensioning device , characterized in that the mounting system further includes a rotatable retention component between the mounting arm and the threaded fastener tensioning device , the rotatable retention component permitting movement of the mounting arm relative to the threaded fastener tensioning device , the rotatable retention component including a locking mechanism for locking threaded fastener tensioning device along a range of angles relative to mounting arm . a threaded fastener tensioning device sized to fit over ends of a threaded fastener in the set of threaded fasteners , the threaded fastener tensioning device including: a retention component for retaining a first end of the threaded fastener ; and a tensioner for tensioning or de-tensioning a second end of the threaded fastener ; the system further comprising a mounting system coupled with the threaded fastener tensioning device , the mounting system for retaining the threaded fastener tensioning device proximate the adjacent segments of the turbomachine casing , wherein the mounting system includes a mounting arm coupled with the threaded fastener tensioning device , characterized in that the mounting system further includes a rotatable retention component between the mounting arm and the threaded fastener tensioning device , the rotatable retention component permitting movement of the mounting arm relative to the threaded fastener tensioning device , the rotatable retention component including a locking mechanism for locking threaded fastener tensioning device along a range of angles relative to mounting arm . a retention component for retaining a first end of the threaded fastener ; and a tensioner for tensioning or de-tensioning a second end of the threaded fastener ; the system further comprising a mounting system coupled with the threaded fastener tensioning device , the mounting system for retaining the threaded fastener tensioning device proximate the adjacent segments of the turbomachine casing , wherein the mounting system includes a mounting arm coupled with the threaded fastener tensioning device , characterized in that the mounting system further includes a rotatable retention component between the mounting arm and the threaded fastener tensioning device , the rotatable retention component permitting movement of the mounting arm relative to the threaded fastener tensioning device , the rotatable retention component including a locking mechanism for locking threaded fastener tensioning device along a range of angles relative to mounting arm . <EOS>