TM 10-3930-671-24 13.3. Triple Stage Upright (TSU) Triple Stage Upright Assembly....................................................... F-508 Primary Lift Cylinder - TSU Upright ................................................ F-509 Final Lift Cylinder - TSU Upright..................................................... F-510 Lift Cylinder Piping - TSU Upright .................................................. F-511 Lift Chain - TSU Upright ................................................................. F-512 F-507