TM10-3930-660-20 18-15. CARRIAGE TILT CYLINDER -  REPLACE (Cont’d) 4. 5. 6. 7. REMOVE MLRS CONTROL VALVE COVER (7). a. Disconnect two light wires (3). b. Remove two bolts (4), two lockwashers (5), and two nuts (6) which secure MLRS control valve cover  (7).   Discard lockwashers (5). c. Remove MLRS cover (7). DETERMINE WHICH CYLINDER TO REMOVE Determine which carriage tilt cylinder is to be removed. REMOVE ROD PIVOT PIN (2). a. Remove bolt (13) and locknut (14) which secure cylinder rod pivot pin (2).   Discard locknut (14). b. Remove pivot pin (2). RETRACT CARRIAGE TILT CYLINDER Move MLRS joystick to carriage “up” position to retract cylinder. Return joystick to neutral position as soon as disconnected cylinder is fully retracted. This will prevent the carriage from being tilted by the other attached   cylinder. 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. 18-59