TM10-3930-660-20 14-11. STEERING SELECT VALVE   -  REPLACE/REPAIR/TEST This task covers: a. Removal b. Disassembly c. Assembly d. Installation e. Testing of valve solenoids Initial Setup Tools Tool Kit, Automotive Mechanics Materials/Parts Container, 6 Gal. Cap and Plug Test Equipment Ohmmeter Hydraulic Oil (App. C, Item 35) Set Lockwashers (6, 9) O-rings  (13,  16) Tags (App. C, Item 51) Equipment  Condition Vehicle parked on level ground. Batteries disconnected, para. 8-44. 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. 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. 14-23