TM10-3930-660-20 18-31. FORK SIDESHIFT CYLINDERS - REPLACE This task covers: a. Removal b. Installation Initial Setup Tools Materials/Parts Tool Kit, Automotive Mechanics Cotter Pins (7, 12) Fluid Container, 1 Gal. Cap and Plug Set Loctite 242 (App. C, Item 39) Tags (App. C, Item 51) Shop Equipment, Automotive Thrust Bushings (15) Maintenance, Common #2 Less Power Equipment  Condition Personnel  Required Vehicle parked on level ground. Two  Personnel Parking brake set. Wheels blocked. Boom in horizontal position, Reference properly supported. TM10-3930-660-10 Fork autoleveler switch and cover removed, para. 8-55. WARNING 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 MLRS 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. WARNING At operating temperatures, hydraulic oil is hot and under pressure. Hot oil can cause injuries. Allow hydraulic oil to cool before disconnecting any hydraulic CAUTION Wipe the area clean around all hydraulic connections to be opened during removal and disassembly. Cap oil lines and plug holes after removing lines. Contamination of the hydraulic system could result in premature failure. If more than one hydraulic line is to be removed, identify lines to assure proper installation. Use suitable container to catch any hydraulic oil that may drain from  system. 18-121