TM10-3930-660-20 14-7. STEERING  HOSES, LINES, AND FITTINGS - REPLACE This task covers: a. Removal b. Installation Initial Setup Tools Materials/Parts Tool Kit, Automotive Mechanics Container, 6 Gal. Tags (App. C, Item 51) Cap and Plug Set Equipment  Condition Vehicle parked on level ground. Hydraulic oil in the system can be under pressures over 3000 psi with the engine OFF. ALWAYS relieve pressure in hydraulic lines before attempting to remove any component in the hydraulic system. With engine OFF, starter switch in RUN position and MLAS attachment on the ground, move control levers through all operating positions several times to relieve  line  pressure. Relieve pressure in hydraulic oil tank by loosening filler cap  very  slowly. Failure to follow these precautions could result in serious personal injury. At operating temperatures, hydraulic oil is hot and under pressure. Hot oil can cause  injuries. Allow hydraulic oil to cool before disconnecting any hydraulic lines. 14-11