TM10-3930-660-20 18-19. MLRS  ATTACHMENT  -  REPLACE  (Cont’d) 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. Use metal caps when specified. 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. Remove caps and plugs as hoses are installed. Wipe all sealing surfaces on hydraulic components and hoses clean and dry. Apply film of clean hydraulic oil to all seals as they are installed. REMOVAL 1. DISCONNECT BOOM ELECTRICAL CABLE LEADS (1) AT JUNCTION BOX (2) AND REMOVE BOOM ELECTRICAL CABLE (3). a. Loosen four screws (4) and separate cover (5) from box (2). Only disconnect electrical leads of boom electrical cable (3) during steps lb through  ld. Do not disconnect any other electrical leads inside box during these steps. Tag screw terminals on terminal strips as electrical leads are removed for use during installation. Note that terminals on strips (6) and (7) are not marked. 18-74