TM10-3930-660-20 18-30. HYDRAULIC OIL FILTER - REP- This task covers: a. Removal b.  Installation Initial Setup Tools Materials/Parts Tool Kit, Automotive Mechanics Container, 1 Gal. Hydraulic Oil (App. c, item 35) Strap Wrench, 1-6” Capacity Lockwashers  (9) Loctite 242 (App. C, Item 39) Cap and Plug Set Loctite 59241 (App. C, Item 42) Tags (APP. C, Item 51) Equipment  Condition Vehicle parked on level ground. Transmission cover removed, para.  16-6. Hydraulic tank drained, para. 5-10. 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. 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. NOTE 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. 18-119