TM10-3930-660-20 18-8. PRIORITY  VALVE  -  REPLACE  (Cont’d) 4. REMOVE PRIORITY VALVE (4). 5. IF NECESSARY, REMOVE HYDRAULIC BYPASS SWITCH (1) FROM PRIORITY VALVE (4), PARA.  8-51. INSTALLATION Remove caps and plugs as hoses are installed. Wipe all sealing surfaces on valve and hoses clean and dry. 1. IF REMOVED, INSTALL HYDRAULIC BYPASS SWITCH (1) TO VALVE (4), 2. SECURE PRIORITY VALVE (4 MOUNTING HARDWARE. a. Position valve (4) on bracket. b. Install two bolts (7) PARA.  8-51. WITH mounting through  holes (8) on mounting bracket and push bolts through valve body. c. Place a new lockwasher (6) on end of each bolt (7). Apply Loctite 242 to bolts (7) as nuts (5) are installed. d. Place a nut (5) on end of each bolt (7). Tighten both nuts (5) to  secure  valve. 3. CONNECT SIX HYDRAULIC LINES (2) AT FITTINGS (3) OF PRIORITY VALVE (4). 4. CONNECT ELECTRICAL LEADS AT HYDRAULIC BYPASS SWITCH (1). a. Connect electrical lead 10 to terminal C of switch (1). b. Connect electrical lead 91 to terminal NC of switch (1). 18-36