(3) Remove nuts (4) and washers (2). Remove shock mounts from frame (5). (4) Remove adaptor (13) from pressure switch (14).  Unscrew and remove mounting nut and washer securing pressure switch to box and remove pressure switch (14).  When damaged only, remove the two lug terminals (15) from pressure switch leads. (5) Remove tubing elbow (16) and connector (17) from solenoid valve (19) only when replacement is required, or repair to solenoid (19) is required.  Remove the corner screw holding box inner panel and ground leads from solenoid valve (19) and safety relay (22).  Remove diode subassembly (21) from box.  Unscrew and remove connector (18) and withdraw solenoid valve (19) from mounting hole. (6) Only when necessary, remove terminal lugs (20) from solenoid switch (19) leads. (7) Remove the remaining three screws attaching box inner panel in place.  Lift the panel from the box and remove nut (26), lock washer (27), and screw (28) which attach the safety relay (29) to the box panel.  Only when damaged, unsolder and remove wire assemblies (22, 20 and 25) and wire lead (23) from control relay (29). (8) To avoid losing parts until ready to assemble, attach lower inner panel in place in the control box assembly (30) with the four corner screws removed during disassembly. b. Cleaning.  Refer to paragraph 6-3.a for general cleaning instructions. (1) Clean components with trichloroethane, per Federal Specification O-T-620, or equivalent. (2) Allow parts to dry thoroughly before attempting to operate the equipment. c. Inspection.  Refer to paragraph 6-3.b for general inspection instructions. (1) Test solenoid valve as follows:   (a) Using a multimeter, check for continuity across coil of the solenoid valve.  Meter should indicate zero (0) ohms. (b) Connect solenoid valve coil leads across the terminals of a 12 volt DC power source.   A metallic click indicates the solenoid valve is operating properly. (2) Test pressure switch as follows: (a) Install pressure switch to be tested in test setup shown in Figure 6-10 or equivalent. NOTE The test setup shall incorporate a master pressure gauge of known accuracy together with suitable pressure regulating and controlling apparatus. The C lead is common, NO lead is normally open, and the NC lead is normally closed. (b) Adjust pressure source until pressure gauge indicates 3,300 psig (22,754 KPa). (c) Slowly increase pressure until lamp Alights. Lamp B shall light between 3,250 (22,392 KPa) and 3,350 psig (23,081 KPa). Figure 6-10.   Pressure Switch Test Setup 6-38